Is I51.4 a billable ICD-10-CM code?

Yes. I51.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does I51.4 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 I51.4?

I51.4 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

I51.4

I51.4 — Myocarditis, unspecified

Billable / specific codeICD-10-CM

I51.4 is a billable, specific ICD-10-CM code for myocarditis, unspecified. 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.

acute or subacute myocarditis (I40.-)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Chronic (interstitial) myocarditis
Myocardial fibrosis
Myocarditis NOS

Other codes that can never be billed with I51.4

These codes carry an Excludes1 note pointing at I51.4. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading I51.4 alone.

I09.0Rheumatic myocarditis

Risk adjustment

I51.4 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 227 Cardiomyopathy/Myocarditis0.189 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

I51.4 is named in 17 Medicare coverage policies — 17 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)
A56476Billing and Coding: Cardiac Radionuclide Imaging

How I51.4 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to I51.4.

Acardiotrophia
Myocarditis(with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile)
Arteriosclerosis, arteriosclerotic›myocarditis

Related codes at this level

Codes that share I51. If I51.4 is not quite right, the correct code is usually one of these.

Questions about I51.4

Is I51.4 a billable ICD-10-CM code?: Yes. I51.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does I51.4 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 I51.4?: I51.4 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.