Certified Medical Coding Specialist ICD-10-CM Diagnosis Coding

Question 1

Which ICD-10-CM code category is used to report type 2 diabetes mellitus without complications?

Accepted Answer

E11.9

Answer

E11.9 is the ICD-10-CM code for type 2 diabetes mellitus without complications.

Question 2

In ICD-10-CM, what does the 7th character 'A' typically indicate in injury codes?

Accepted Answer

Initial encounter

Answer

The 7th character 'A' in ICD-10-CM injury codes designates the initial encounter for active treatment.

Question 3

Which ICD-10-CM guideline requires coding the underlying condition first, followed by the manifestation?

Accepted Answer

Etiology/manifestation convention

Answer

The etiology/manifestation convention requires the underlying disease to be sequenced first, with the manifestation code listed secondarily.

Question 4

An Excludes1 note in ICD-10-CM means:

Accepted Answer

The excluded condition cannot be coded together with the code above it

Answer

Excludes1 indicates a pure exclusion — the two conditions cannot occur together, so both codes should never be assigned simultaneously.

Question 5

Which section of ICD-10-CM contains codes for factors influencing health status, such as vaccination status?

Accepted Answer

Z codes

Answer

Z codes (Z00–Z99) in ICD-10-CM classify factors influencing health status and contact with health services, including vaccination status.

Certified Medical Coding Specialist Practice Test