Is I39 a billable ICD-10-CM code?

Yes. I39 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does I39 sit in the tabular list?

Diseases of the circulatory system (I00-I99), in the block Other forms of heart disease (I30-I5A).

What cannot be coded together with I39?

I39 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

I39

I39 — Endocarditis and heart valve disorders in diseases classified elsewhere

Billable / specific codeICD-10-CM

I39 is a billable, specific ICD-10-CM code for endocarditis and heart valve disorders in diseases classified elsewhere. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

endocardial involvement in:
candidiasis (B37.6)
gonococcal infection (A54.83)
Libman-Sacks disease (M32.11)
listerosis (A32.82)
meningococcal infection (A39.51)
rheumatoid arthritis (M05.31)
syphilis (A52.03)
tuberculosis (A18.84)
typhoid fever (A01.02)

Code first

The underlying condition must be sequenced before this code.

underlying disease, such as:
Q fever (A78)

Risk adjustment

I39 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

I39 is named in 23 Medicare coverage policies — 23 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
A52868Billing and Coding: Transesophageal Echocardiography (TEE)
A52868Billing and Coding: Transesophageal Echocardiography (TEE)

Questions about I39

Is I39 a billable ICD-10-CM code?: Yes. I39 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does I39 sit in the tabular list?: Diseases of the circulatory system (I00-I99), in the block Other forms of heart disease (I30-I5A).
What cannot be coded together with I39?: I39 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.