Is I5A a billable ICD-10-CM code?

Yes. I5A is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does I5A 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 I5A?

I5A carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

I5A

I5A — Non-ischemic myocardial injury (non-traumatic)

Billable / specific codeICD-10-CM

I5A is a billable, specific ICD-10-CM code for non-ischemic myocardial injury (non-traumatic). 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 myocardial infarction (I21.-)
injury of heart (S26.-)

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

other acute ischemic heart diseases (I24.-)

Code first

The underlying condition must be sequenced before this code.

the underlying cause, if known and applicable, such as:
acute kidney failure (N17.-)
acute myocarditis (I40.-)
cardiomyopathy (I42.-)
chronic kidney disease (CKD) (N18.-)
heart failure (I50.-)
hypertensive urgency (I16.0)
nonrheumatic aortic valve disorders (I35.-)
paroxysmal tachycardia (I47.-)
pulmonary embolism (I26.-)
pulmonary hypertension (I27.0, I27.2-)
sepsis (A41.-)
takotsubo syndrome (I51.81)

Inclusion terms

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

Acute (non-ischemic) myocardial injury
Chronic (non-ischemic) myocardial injury
Unspecified (non-ischemic) myocardial injury

Risk adjustment

I5A 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

I5A is named in 8 Medicare coverage policies — 8 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A53775Billing and Coding: Frequency and Duration for Cardiac Rehabilitation and Intensive Cardiac Rehabilitation
A56391Billing and Coding: Implantable Automatic Defibrillators
A56391Billing and Coding: Implantable Automatic Defibrillators
A57083Billing and Coding: B-type Natriuretic Peptide (BNP) Testing

How I5A 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 I5A.

Injury›myocardial(acute) (chronic) (non-ischemic) (non-traumatic)
Injury›heart›non-traumatic(acute) (chronic) (non-ischemic)

Questions about I5A

Is I5A a billable ICD-10-CM code?: Yes. I5A is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does I5A 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 I5A?: I5A carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.