A code needs a 7th character but is only five characters long. What goes in the empty sixth place?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.5
A code title ends "in diseases classified elsewhere". Where may the code be sequenced?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.13
A main term in the Alphabetic Index is followed by "see also". Must the coder go to the other term?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.16
Accidental poisoning by penicillin, initial encounter. Which of these is written as a valid code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.4; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
The Alphabetic Index links two conditions with the word "with". The provider documents both and does not link them. How are they coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.15
An instruction in the Tabular List and a guideline disagree. Which is followed?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I (opening)
Show all 175 questions (169 more)
Conventions (Section I.A), continued
Dementia in Parkinson's disease. No dyskinesia or fluctuations are mentioned, the severity of the dementia is not stated, and there is no behavioral disturbance. Which order is right?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.13; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
F45.8, Other somatoform disorders, has an Excludes1 note for sleep related teeth grinding (G47.63). A patient has psychogenic dysmenorrhea and, unrelated to it, sleep related teeth grinding. What is reported?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.12.a; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
How many characters does every ICD-10-CM category have?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.2
In the Alphabetic Index, what does NEC on an entry tell the coder?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.6.a
On what is the assignment of a diagnosis code based?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.19
The record gives a detail that no existing code captures. Which kind of code is used?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.9
The record says "appendicitis" and nothing more. Which code is assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.18; Alphabetic Index, main term Appendicitis; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
Tuberculosis of joints, with no bone involved, is classified to subcategory A18.0, Tuberculosis of bones and joints. Which convention explains this?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.14
What are the words in parentheses after a term called?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.7
What do brackets around a code mean in the Alphabetic Index?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.7 and I.A.13
What does a "code also" note say about sequencing?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.17
What does an Excludes1 note mean?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.12.a
What does an Excludes2 note allow?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.12.b
Which abbreviation is the equivalent of "unspecified"?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.6
Which level of the classification may be reported: a category, a subcategory or a code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.3
Which part of ICD-10-CM is a structured list of codes divided into chapters by body system or condition?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.A.1
General coding rules (Section I.B) 21
A code carries the note "Code, if applicable, any causal condition first". The causal condition is unknown. May the code be the principal diagnosis?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.7
A condition described at discharge as "threatened" did not occur, and the Index lists no "threatened" or "impending" subterm for it. What is coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.11
A condition is documented as both acute and chronic, and the Index has separate subentries at the same indentation level. How is it coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.8
A condition is on both sides of the body, and the classification has no bilateral code for it. What is assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.13
A confirmed disease and a symptom that is routinely part of it are both documented. What is coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.5
A nurse documents the stage of a pressure ulcer that the provider has diagnosed. May the stage be coded from the nurse's note?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.14
A syndrome has no guidance in the Alphabetic Index. What is coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.15
At discharge the provider documents a "borderline" diagnosis, and the Index has no borderline entry for it. How is it coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.17
Cataracts in both eyes are operated on in separate encounters, and the first eye is fully treated. Which code describes the second encounter?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.13
How long after the acute illness or injury may a sequela code be used?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.10
How many sites does the classification mean by "multiple"?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.20
How many times may one diagnosis code be reported for an encounter?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.12
In what order are the two codes for a sequela generally sequenced?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.10
No definitive diagnosis is established by the end of the encounter. What is reported?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.18
One combination code fully identifies both documented conditions. What is assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.9
Pneumonia is diagnosed, but its type is not known by the end of the encounter. Which code fits?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.18; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
What does a dash at the end of an Alphabetic Index entry mean?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.1
What is the first step in locating a code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.1
What must the documentation show before a condition is coded as a complication of care?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.16
When may a three-character code be reported?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.2
Which of these may be reported only as a secondary diagnosis?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.B.14
Infections and sepsis (Chapter 1) 17
A patient is admitted with pneumonia. Sepsis develops two days after admission. What is sequenced first?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.d.4
A patient once had an HIV-related illness and has no symptoms today. Which code applies?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.a.2.g
A patient with HIV disease is admitted for a traumatic injury unrelated to it. What is the principal diagnosis?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.a.2.c
A patient with no signs or symptoms comes in to be tested for HIV. Which code is assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.a.2.i; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
A postprocedural infection leads to postprocedural septic shock. Which shock code is assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.d.5.c
A provider documents "urosepsis". What does the coder do?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.d.1.a.ii
An infection is classified outside Chapter 1, and its code names no organism. How is the organism shown?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.b
An inpatient's record at discharge says "possible HIV infection". How is HIV coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.a.1
Blood cultures are negative, and the provider documents sepsis on clinical evidence. What does the guideline say?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.d.1.a.i
"HIV positive" is documented, with no symptoms and no HIV-related illness. Which code is assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.a.2.e; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
May a code from subcategory R65.2, Severe sepsis, be the principal diagnosis?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.d.3
"MRSA nasal swab positive" is documented as colonization, with no infection. Which code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.e.1.c; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
Pneumonia due to MRSA. What is reported?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.e.1.a; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
Sepsis and an acute organ dysfunction are documented, and the record ties the dysfunction to another medical condition. Is a severe sepsis code assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.d.1.a.iv
Sepsis is diagnosed, and neither the type of infection nor the organism is specified. Which code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.d.1.a; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
Sepsis with septic shock. The organism is not documented, and no procedure is involved. Which codes, in which order?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.d.2; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
When is a code from category Z16, Resistance to antimicrobial drugs, added?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.1.c
Neoplasms (Chapter 2) 14
A breast cancer was excised years ago. There is no further treatment and no evidence of the disease. Which code describes it?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.2.d and I.C.2.m; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
A patient is admitted for brachytherapy (implanted radioactive elements). What is the principal diagnosis?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.2.e.2
A patient is admitted for chemotherapy and develops dehydration during the stay. How are the codes sequenced?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.2.e.3
A patient with a primary cancer and a metastasis is admitted, and treatment is directed at the metastasis only. What is the principal diagnosis?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.2.b
A pregnant patient has a malignant neoplasm. What is sequenced first?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.2.l.3
A primary malignant neoplasm overlaps two sites that are next to each other, and the combination is not indexed elsewhere. How is it classified?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.2
An admission is to manage anemia associated with a malignancy, and only the anemia is treated. What is sequenced first?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.2.c.1
An admission is to manage anemia caused by an adverse effect of chemotherapy, and only the anemia is treated. What is sequenced first?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.2.c.2
An encounter is for a pathological fracture due to a neoplasm, and treatment is focused on the fracture. What is sequenced first?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.2.l.6
An encounter is solely for chemotherapy for a malignancy. Which code is first-listed?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.2.e.2; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
Can a Chapter 18 symptom code replace an existing malignancy as the principal diagnosis?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.2.g
"Cancer" is documented, and no primary site can be determined. Which code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.2.k; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
The record says "adenoma". Where does the coder look first?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.2
When is C80.0, Disseminated malignant neoplasm, unspecified, used?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.2.j
Diabetes and obesity (Chapter 4) 11
A patient with type 2 diabetes is treated with both insulin and oral hypoglycemic drugs. Which long-term drug codes are assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.4.a.3
A type 2 patient is given insulin for a short time during an encounter to bring blood sugar under control. Is Z79.4 assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.4.a.3
An insulin pump fails and the patient receives too little insulin. What is the first-listed code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.4.a.5.a
Both class 3 obesity and morbid obesity are documented. What is coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.4.b.1
"Diabetes mellitus" is documented with no type and no complications. Which code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.4.a.2; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
How many codes from categories E08 to E13 may be assigned for one patient?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.4.a
Postpancreatectomy diabetes takes a code from category E13 and a code from subcategory Z90.41. Which other code does the guideline assign?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.4.a.6.b.i; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
The provider writes that a patient's type 2 diabetes is "resolved". May E11.A, in remission, be assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.4.a.1.b
The record gives no type of diabetes but says the patient uses insulin long term. No complications. What is reported?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.4.a.3; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
What are the codes E10.A- used for?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.4.a.1.a
Which categories identify secondary diabetes mellitus?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.4.a.6
Circulatory system (Chapter 9) 17
A patient had a cerebral infarction years ago and has no neurologic deficits. Which code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.d.3; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
A patient has a new type 1 myocardial infarction three weeks after an initial type 1 infarction. How is the new one coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.e.4
A patient has hypertension, heart disease and chronic kidney disease. Which category is used?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.a.3
A type 1 NSTEMI evolves to a STEMI. Which is coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.e.1
A type 2 myocardial infarction is described as an NSTEMI. Which code is assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.e.5
"Acute myocardial infarction" is documented with no type and no site. Which code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.e.2; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
Atherosclerotic heart disease of a native coronary artery with angina pectoris; the type of angina is not specified. What is reported?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.b; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
Dominance is not documented, and the patient is ambidextrous. What is the default for a hemiplegia code from I69?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.d.1
For how long may an acute myocardial infarction code from I21 continue to be reported?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.e.1
Hemiplegia after a cerebral infarction affects the left side. Dominance is not documented, and the patient is not ambidextrous. Which code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.d.1; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
How is hypertensive cerebrovascular disease sequenced?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.a.4
How many codes does secondary hypertension need?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.a.6
Hypertension and chronic kidney disease, stage 3a. What is reported?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.a.2; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
Hypertension and heart failure are both documented, and the provider does not link them. What is reported?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.a.1; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
"Hypertensive urgency" is documented in a patient with essential hypertension. What is reported?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.a.10; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
Resistant hypertension is documented. How is I1A.0 used?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.a.12
"Transient hypertension" is documented in a patient who is not pregnant and has no established diagnosis of hypertension. Which code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.9.a.7; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
Pregnancy and childbirth (Chapter 15) 14
A mother delivers at home, is then admitted for routine postpartum care, and has no complications. Which code is principal?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.15.o.4; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
A patient is admitted in the second trimester for a pregnancy complication that develops then, and she stays into the third trimester. Which trimester does the code show?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.15.a.4
A pregnant patient has pre-existing diabetes mellitus. What is sequenced first?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.15.g
A pregnant patient is treated for a sprained wrist, and the provider documents that the pregnancy is incidental to the encounter. Which pregnancy code is used?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.15.a.1; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
A routine prenatal visit in the second trimester of a normal first pregnancy, with no complications. Which code is first-listed?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.15.b.1; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
Gestational diabetes during pregnancy is treated with both diet and insulin. Which code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.15.i; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
How long is the postpartum period?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.15.o.1
On whose record are Chapter 15 codes used?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.15.a.2
The provider documents gestation of 39 weeks and 6 days. Which code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.15.a.7; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
When may codes from O09, Supervision of high-risk pregnancy, be used?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.15.b.2
Where do Chapter 15 codes stand in sequencing against codes from other chapters?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.15.a.1
Which codes are not used for puerperal sepsis?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.15.k
Which outcome of delivery code may be used with O80, Encounter for full-term uncomplicated delivery?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.15.n.3
Which record carries a code from Z37, Outcome of delivery?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.15.b.5
Injuries, poisoning and external causes (Chapters 19 and 20) 25
A contusion and a fracture are at the same site. Is the contusion coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.b.1
A fracture of the upper end of the right tibia is treated for the first time. It is not documented as open or closed. Which code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.c; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
A patient delays seeking treatment for a fracture. Which kind of 7th character is used at the first treatment?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.c.1
A patient stops a prescribed medication on their own initiative. How is this classified?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.e.5.c
A patient takes penicillin exactly as prescribed and develops a rash. Initial encounter. Which drug code follows the code for the rash?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.e.5.a; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
A patient with known osteoporosis breaks a bone in a minor fall that would not usually break a healthy bone. Which category is used?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.c.1
A reaction results from a correctly taken prescription drug combined with alcohol. How is it classified?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.e.5.b.iv
A scar is treated as a sequela of an old burn. How are the codes arranged?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.a
An open fracture of the upper end of the right tibia is treated for the first time. The Gustilo type is not specified. Which code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.c.1; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
An overdose of penicillin, initial encounter. The record does not state the intent. Which code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.e.5.b; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
By the rule of nines behind categories T31 and T32, what share of the body surface is each leg?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.d.6
For a suspected case of abuse, are external cause and perpetrator codes reported?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.f
How is aftercare of an injury coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.a
How often is a place of occurrence code from Y92 generally assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.20.b
Is a Chapter 20 external cause code needed with T36.0X1-, Poisoning by penicillins, accidental?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.20.a.8
Is there a national requirement to report ICD-10-CM external cause codes?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.20
May an external cause code be the first-listed diagnosis?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.20.a.6
The medical record states that an adult patient was abused. Is it coded as confirmed or suspected?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.f
Second and third degree burns of the right thigh, initial encounter. What is assigned for the thigh?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.d.2; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
Two events cause separate injuries: a transport accident and confirmed child abuse. Which external cause code is listed first?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.20.f
What decides whether an injury code takes 7th character A, initial encounter?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.a
What does ICD-10-CM call a burn caused by a chemical?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.d
When is a transplant complication code from T86 assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.g.3.a
Where must a code found in the Table of Drugs and Chemicals be checked before it is assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.e.1
Which 7th character is used for routine care during the healing or recovery phase of an injury?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.19.a
Z codes (Chapter 21) 13
A follow-up examination after completed treatment for breast cancer finds no recurrence. Which code is first-listed?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.21.c.8; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
A Pap smear is done as part of a routine pelvic examination. Is a separate screening code needed?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.21.c.5
A patient is observed for a suspected condition and has symptoms related to it. May an observation Z code be used?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.21.c.6
A patient is transferred after receiving tPA at another facility within the last 24 hours. On which facility's record is Z92.82 assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.21.c.3
A patient takes antibiotics for a week for acute bronchitis. Is a code from Z79, Long term (current) drug therapy, assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.21.c.3
A patient with a symptom has a test to confirm or rule out a suspected diagnosis. Is this a screening?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.21.c.5
A routine examination finds nothing abnormal, and it is coded before test results are back. Which code is acceptable?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.21.c.12
A Z code describes an encounter at which a procedure is performed. What else is needed?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.21.b
At a follow-up visit the treated condition is found to have recurred. What is coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.21.c.8
Is Z94.1, Heart transplant status, used with a code from T86.2, Complications of heart transplant?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.21.c.3
What does a personal history Z code say about the condition?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.21.c.3 and I.C.21.c.4
When may a body mass index (BMI) code be assigned?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.21.c.3
Which donations do the codes in category Z52, Donors of organs and tissues, not identify?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section I.C.21.c.9
Principal, additional and outpatient diagnoses (Sections II to IV) 21
A discharge summary lists a resolved condition from an earlier admission that has no bearing on the current stay. Is it reported?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section III.A
A general medical examination finds a new condition. What is first-listed?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section IV.P
A patient is admitted for a condition, and the planned treatment is not carried out because of unforeseen circumstances. What is the principal diagnosis?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section II.F
A patient is seen only for a preoperative cardiovascular evaluation before cataract surgery. What is sequenced first?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section IV.M; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
A patient presents for same-day surgery, and the surgery is cancelled because of a contraindication. What is first-listed?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section IV.A.1
A related definitive diagnosis has been established. May a Chapter 18 symptom code be the principal diagnosis?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section II.A
After outpatient surgery a patient is admitted to the same hospital because of a complication. What is the principal diagnosis?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section II.J
An admission is for rehabilitation after a hip replacement done for severe osteoarthritis of the hip. Which code is first-listed?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section II.K; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
An admission is for rehabilitation after a hip replacement for an intertrochanteric fracture of the right femur. Which code is first-listed?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section II.K; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
An inpatient's laboratory result is outside the normal range, and the provider has not commented on it. Is it coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section III.B
An office visit note says "suspected pneumonia". How is the outpatient encounter coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section IV.H
An outpatient diagnostic test has been interpreted by a physician, and the final report with a confirmed diagnosis is available at the time of coding. What is coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section IV.K
An outpatient has routine laboratory testing with no signs, symptoms or associated diagnosis. Which code?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section IV.K; code titles from the FY 2027 ICD-10-CM code descriptions file (cms.gov)
At discharge from an acute care hospital the diagnosis is written as "probable pneumonia". How is it coded for the inpatient stay?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section II.H
For ambulatory surgery, the postoperative diagnosis is confirmed and differs from the preoperative one. Which is coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section IV.N
How does the Uniform Hospital Discharge Data Set define the principal diagnosis?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section II
How often may a chronic disease treated on an ongoing basis be coded?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section IV.I
To which settings does the uncertain diagnosis rule of Section II.H apply?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section II.H
Two diagnoses equally meet the definition of principal diagnosis, and nothing in the Index, the Tabular List or the guidelines gives an order. Which is first?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section II.C
What is the outpatient term used in place of "principal diagnosis"?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section IV.A
Which of these makes a condition a reportable "other diagnosis"?ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, Section III
How this list was compiled: Our own questions, written from the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (October 1, 2026 through September 30, 2027), published by the Centers for Medicare & Medicaid Services and the National Center for Health Statistics (https://www.cms.gov/files/document/fy-2027-icd-10-cm-coding-guidelines.pdf, linked from https://www.cms.gov/medicare/coding-billing/icd-10-codes, read 2026-10-08). The topics follow the order of the guidelines: Section I.A conventions, Section I.B general rules, the chapter guidelines for Chapters 1, 2, 4, 9, 15, 19 with 20, and 21, then Sections II, III and IV. The bank holds 22, 21, 17, 14, 11, 17, 14, 25, 13, 21 questions in that order. Code numbers and titles are from the FY 2027 code descriptions file and the Alphabetic Index of the same page (2027 Code Descriptions in Tabular Order; 2027 Code Tables, Tabular and Index), read 2026-10-08. Licence: Questions, choices and explanations are original work of this site. Code titles are from the federal ICD-10-CM files.
How it works
These 175 ICD-10-CM practice questions are our own, written from the FY 2027 Official Guidelines. Unofficial: not affiliated with or endorsed by the Centers for Disease Control and Prevention, the National Center for Health Statistics or the Centers for Medicare & Medicaid Services.
Read the full guide
What the questions follow
The ICD-10-CM Official Guidelines for Coding and Reporting for fiscal year 2027, in effect October 1, 2026 through September 30, 2027, read at cms.gov on October 8, 2026. Topics run in the guidelines' order: conventions, general rules, eight chapters, then principal, additional and outpatient diagnoses.
ICD 10 coding practice with cases
About a quarter of the questions are ICD 10 test cases: a short diagnostic statement and codes to choose from, settled by a rule. Code titles come from the FY 2027 code descriptions file.
A code set, not one exam
ICD-10-CM has no official length, time limit or pass mark to copy. Exam mode asks 25 questions and gives the number right.
Codes and rules change each October 1, so an older code book may disagree with fiscal year 2027.
Questions and answers
Is this ICD 10 practice test free?
Yes. It is free with no sign-up, and it covers ICD-10-CM diagnosis coding only, not ICD-10-PCS or any other procedure code set.
Does it give ICD 10 test questions and answers?
Yes. After each choice the right answer shows with a short reason and its guideline section, such as I.C.9.a, so these ICD 10 questions and answers can be checked in the federal file.
Is there an ICD-10-CM practice questions and answers PDF?
After a set, Print opens a question sheet that you can lengthen, with its answer key if you tick the box. The print window of your browser can save it as a PDF.
Are these ICD 10 CM practice questions from a real exam?
No. Every one of these ICD 10 practice questions is our own, written from the federal guidelines, and none is copied or reworded from a certification exam, a code book or a prep site.