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

Clinical notes

Code first

This code represents a manifestation of an underlying disease. Coding convention requires the underlying (etiology) code to be sequenced first, with this code listed second.

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)

Excludes1 (not coded here)

An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).

acute myocardial infarction (I21.-)
injury of heart (S26.-)

Excludes2 (not included here)

An Excludes2 note means the excluded condition is not part of this one, but a patient can have both at the same time — in that case both codes may be reported together.

other acute ischemic heart diseases (I24.-)

Also known as

Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.

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

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

•Laterality-specific codes exist for this condition — confirm the affected side is documented.
•Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
•This code represents a manifestation. Documentation should identify the underlying condition, which must be coded first.
•As a general rule, code to the highest level of specificity supported by the documentation in the medical record.

Related codes in this category

Associated MS-DRGs

I5A can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.

Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.