Is I50.31 a billable ICD-10-CM code?

Yes. I50.31 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does I50.31 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 I50.31?

I50.31 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above I50.31 (I50.3) and apply to it just the same.

I50.31

I50.31 — Acute diastolic (congestive) heart failure

Billable / specific codeICD-10-CM

I50.31 is a billable, specific ICD-10-CM code for acute diastolic (congestive) heart failure. It is valid for submission on a claim.

Excludes1 inherited from the categories above I50.31

These are not written on I50.31, but they bind it: a note on a category applies to every code beneath it. Billing I50.31 with anything listed here is a denial.

Written on I50.3 — Diastolic (congestive) heart failure

combined systolic (congestive) and diastolic (congestive) heart failure (I50.4-)

Excludes2 inherited from the categories above I50.31

Also inherited, and the opposite of Excludes1: these conditions are not part of I50.31, but a patient can have both, so you may code both.

Written on I50 — Heart failure

cardiac arrest (I46.-)
neonatal cardiac failure (P29.0)

Risk adjustment

I50.31 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 225 Acute Heart Failure (Excludes Acute on Chronic)0.360 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

I50.31 is named in 65 Medicare coverage policies — 65 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A52458Automatic External Defibrillators - Policy Article
A52458Automatic External Defibrillators - Policy Article
A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography

How I50.31 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 I50.31.

Failure, failed›heart›diastolic›acute(congestive)

Code history

I50.31 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share I50.3. If I50.31 is not quite right, the correct code is usually one of these.

Questions about I50.31

Is I50.31 a billable ICD-10-CM code?: Yes. I50.31 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does I50.31 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 I50.31?: I50.31 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above I50.31 (I50.3) and apply to it just the same.