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ICD-10-CM 2027 diagnosis code

I5ANon-ischemic myocardial injury (non-traumatic)

✓ Billable / specificCC — complication/comorbidity

I5A is a valid, billable ICD-10-CM code for non-ischemic myocardial injury (non-traumatic). It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2022 (effective October 1, 2021). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About I5A

I5A is the ICD-10-CM diagnosis code for Non-ischemic myocardial injury (non-traumatic). It belongs to block I30-I5A (other forms of heart disease) and chapter 9 (diseases of the circulatory system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Don't report I5A together with the conditions in its Excludes1 note: acute myocardial infarction (I21.-) and injury of heart (S26.-).

The conditions in its Excludes2 note aren't part of I5A, but may be coded alongside it if the patient has both: other acute ischemic heart diseases (I24.-).

Code first the underlying cause, if known and applicable, such as: acute kidney failure (N17.-), acute myocarditis (I40.-), cardiomyopathy (I42.-), chronic kidney disease (CKD) (N18.-) and 8 more.

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 314 (Other Circulatory System Diagnoses with MCC, relative weight 2.0873), DRG 315 (Other Circulatory System Diagnoses with CC, relative weight 0.9508) and DRG 316 (Other Circulatory System Diagnoses without CC/MCC, relative weight 0.6677), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It was added in FY2022, effective October 1, 2021.

Coding notes

Applicable toConditions and synonyms classified to this code
  • Acute (non-ischemic) myocardial injury
  • Chronic (non-ischemic) myocardial injury
  • Unspecified (non-ischemic) myocardial injury
Excludes1Not coded here — never report together with this code
  • acute myocardial infarction (I21.-)
  • injury of heart (S26.-)
Excludes2Not included here — may be reported together if both conditions exist
  • other acute ischemic heart diseases (I24.-)
Code firstSequence the underlying condition first
  • 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)

Notes that apply from higher levels

Instructions written at a parent level also apply to I5A.

Broader instructions also apply from Chapter 9: Diseases of the circulatory system.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to I5A.

Codes whose notes reference I5A

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2022 (effective 10/1/2021): Added
  • No changes since FY2022.

Common questions about I5A

Is I5A billable?

Yes. I5A is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can I5A be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict I5A as a principal diagnosis.

Is I5A a CC or MCC?

I5A is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does I5A group to?

I5A is used in the MS-DRG v44.0 logic for MS-DRG 314 (Other Circulatory System Diagnoses with MCC), MS-DRG 315 (Other Circulatory System Diagnoses with CC) and MS-DRG 316 (Other Circulatory System Diagnoses without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.