2027 ICD-10-CM Diagnosis Code I5ANon-ischemic myocardial injury (non-traumatic)

ICD-10-CM Codes›I00–I99›I30-I5A›non-traumatic

ICD-10-CM I5A
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

I5A is a billable ICD-10-CM diagnosis code for non-ischemic myocardial injury (non-traumatic). It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 314 through 316. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 66 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other and ill-defined heart disease.

Code Identity

ICD-10-CM Code
I5A
Billable Status
Yes — Valid for Submission
Code Describes
Non-ischemic myocardial injury (non-traumatic)
Short Description
Non-ischemic myocardial injury (non-traumatic)
Same as the full description in the CMS dataset.
Chapter
I30-I5A
Other forms of heart disease

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI30-I5AOther forms of heart disease
Categorynon-traumaticNon-ischemic myocardial injury (I5A)
This CodeI5ANon-ischemic myocardial injury (non-traumatic)

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I5A: its own notes plus those printed at Chapter 9. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

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

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

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

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On I5A itself
  • other acute ischemic heart diseases (I24.-)
From Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Code First

The underlying condition named in the note is 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)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name I5A, its category, or a range that includes it.

Excludes2 2

These codes carry an Excludes2 note naming I5A: its condition is not part of those codes, and both may be reported when the patient has both.

  • I24 Other acute ischemic heart diseases
    non-ischemic myocardial injury (I5A)
  • I25 Chronic ischemic heart disease
    non-ischemic myocardial injury (I5A)

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR CIR015
Other and ill-defined heart disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Heart Diseases

Heart disease is a general term that includes many types of heart problems. It's a type of cardiovascular disease, which means heart and blood vessel disease.

The full article covers:

  • What is heart disease?
  • What are the types of heart disease?
  • What causes heart diseases?
  • Who is more likely to develop heart diseases?
  • What are the symptoms of heart disease?
  • How are heart diseases diagnosed?
  • What are the treatments for heart disease?
  • Can heart diseases be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code History & ChangesHistory

Replacement I5A replaces the following previously assigned code(s):

  • I21.A9 - Other myocardial infarction type
FY 2022AddedAdded to the ICD-10-CM code setEffective October 1, 2021.
FY 2023–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About I5AOverview

What is the ICD-10 code for non-ischemic myocardial injury (non-traumatic)?

The ICD-10-CM code for non-ischemic myocardial injury (non-traumatic) is I5A. It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is I5A (Non-ischemic myocardial injury (non-traumatic)) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report non-ischemic myocardial injury (non-traumatic) on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does I5A group to?

When non-ischemic myocardial injury (non-traumatic) is the principal diagnosis on an inpatient stay, it groups to MS-DRG 314, 316, 315, with relative weights from 0.6678 to 2.0871 depending on complications. Higher weights mean higher Medicare reimbursement.

Is I5A a CC or MCC?

CMS lists I5A as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 66 closely related codes in its exclusion list.

Can I5A be reported with a code from I21?

Not as a rule. The Excludes1 note on I5A lists "acute myocardial infarction (I21.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).