Free COC ICD-10-CM Coding Questions and Answers

Question 1

A patient reports to the ASC for excision of a lipoma of the neck. The lab report later indicated a diagnosis of malignant neoplasm of the neck. What diagnosis code(s) are reported?

Accepted Answer

C76.0

Answer

Explanation:
ICD-10-CM guideline IV.N Ambulatory surgery states if the postoperative diagnosis is known to be different from the preoperative diagnosis at the time the diagnosis is confirmed, select the postoperative diagnosis for coding since it is the most definitive. In the Table of Neoplasms, look up neck NEC/ malignant primary/ which directs to C76.0. Verify this code in the tabular.

Question 2

What is the diagnosis code for a furuncle of the groin?

Accepted Answer

L02.224

Answer

Explanation:
A furuncle is coded differently than a carbuncle in ICD-10-CM. Always use the ICD-10-CM Index to find the correct code. In the ICD-10-CM Index, look up Furuncle/ groin/ which directs to L02.224. Verify this code in the tabular. L02.234 is the code for carbuncle of groin and is incorrect for this question, as are L02.32 Furuncle of buttock, and L02.214 cutaneous abscess of groin.

Question 3

What is the diagnosis code for post-traumatic osteoarthritis of the left elbow?

Accepted Answer

M19.122

Answer

Explanation:
In the ICD-10-CM index, look up Osteoarthritis/ post-traumatic/ elbow/ which directs to M19.12-. Checking the tabular, the correct code is M19.122 which indicates the left elbow.

Question 4

A 6-year-old boy is diagnosed with childhood asthma with exacerbation by the emergency room physician. His caretakers are chain smokers and the physician documents exposure to environmental tobacco smoke. What diagnosis code(s) are reported?

Accepted Answer

J45.901, Z77.22

Answer

Explanation:
In the ICD-10-CM index, look up Asthma/ childhood/ with exacerbation (acute) which points to J45.901. Verify this code in the tabular. There is an instructional note under category J45 which states to use an additional code to identify exposure to environmental tobacco smoke (Z77.22). Verify this code in the tabular. It would be inappropriate to code tobacco use (Z72.0) on this encounter for the child because it is not the child who is a chain smoker. Also, there is an Excludes1 note under Z77.22 for tobacco use (Z72.0) indicating that these codes cannot be coded together.

Question 5

Cardiomegaly due to hypertension with chronic kidney disease. What diagnosis code(s) are reported?

Accepted Answer

I13.10, N18.9

Answer

Explanation:
Cardiomegaly is an enlarged heart. If it were the only diagnosis it would be coded with I51.7. Since cardiomegaly is due to hypertension, we look up the ICD-10-CM index, Hypertension/ heart (disease) (conditions in I51.4-I51.9 due to hypertension with kidney disease), which directs us to see Hypertension, cardiorenal. Lookup Hypertension / cardiorenal (disease)/ without heart failure/ which points to I13.10. This is covered by guideline I.C.9.a.3 Hypertensive Heart and Chronic Kidney Disease. Here it states ""If a patient has hypertension, heart disease, and chronic kidney disease then a code from I13 should be used, not individual codes for hypertension, heart disease, and chronic kidney disease, or codes from I11 or I12. Note, in this scenario the stage of chronic kidney disease is not stated. Verifying the code I13.10 we see that it is correct for "Hypertensive heart and chronic kidney disease without heart failure, with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease" However, there is an instructional note to use additional code to identify the stage of chronic kidney disease (N18.1 -N18.4, N18.9). Code N18.9 is appropriate for unspecified chronic kidney disease.

COC - Certified Outpatient Coder Practice Test

COC - Certified Outpatient Coder Practice Test

Free COC ICD-10-CM Coding Questions and Answers