2026 ICD-10-CM Diagnosis Code I5ANon-ischemic myocardial injury (non-traumatic)
ICD-10-CM Codes›I00–I99›I30-I5A›non-traumatic
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
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 2026 (October 1, 2025 through September 30, 2026) 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 63 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other and ill-defined heart disease.
Code Identity
Code Classification
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Acute (non-ischemic) myocardial injury
- Chronic (non-ischemic) myocardial injury
- Unspecified (non-ischemic) myocardial injury
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
- 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
Type 1 Excludes
Type 2 Excludes
- other acute ischemic heart diseases I24
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
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.
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
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, 2025 through September 30, 2026.
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, 2025 through September 30, 2026.
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, 315, 316, with relative weights from 0.6821 to 2.0852 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 2026. 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 63 closely related codes in its exclusion list.
