---
title: "ICD-10-CM I25.6: Silent myocardial ischemia | BillingBrief"
description: "ICD-10-CM code I25.6: Silent myocardial ischemia. Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/icd10/i25.6/"
language: "en"
---

# I25.6 Silent myocardial ischemia

ICD-10-CM · [CMS code reference](#source)

**Official ICD-10-CM description:** Silent myocardial ischemia

## Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

### Excludes2

Not part of this code, but both can be coded when both are documented.

-   non-ischemic myocardial injury (I5A)

### Use additional code

Add a second code for the following, when documented.

-   code to identify:
-   chronic total occlusion of coronary artery ([I25.82](https://billingbrief.com/icd10/i25.82/))
-   exposure to environmental tobacco smoke (Z77.22)
-   history of tobacco dependence ([Z87.891](https://billingbrief.com/icd10/z87.891/))
-   occupational exposure to environmental tobacco smoke (Z57.31)
-   tobacco dependence (F17.-)
-   tobacco use ([Z72.0](https://billingbrief.com/icd10/z72.0/))

### Code also

A second code may be needed. Sequencing depends on the encounter.

-   the presence of hypertension ([I10](https://billingbrief.com/icd10/i10/)\-I1A)

## Related codes

-   [`I25.3` Aneurysm of heart ICD-10-CM](https://billingbrief.com/icd10/i25.3/)
-   [`I25.41` Coronary artery aneurysm ICD-10-CM](https://billingbrief.com/icd10/i25.41/)
-   [`I25.42` Coronary artery dissection ICD-10-CM](https://billingbrief.com/icd10/i25.42/)
-   [`I25.5` Ischemic cardiomyopathy ICD-10-CM](https://billingbrief.com/icd10/i25.5/)
-   [`I25.700` Atherosclerosis of coronary artery bypass graft(s), unspecified, with unstable angina… ICD-10-CM](https://billingbrief.com/icd10/i25.700/)
-   [`I25.701` Atherosclerosis of coronary artery bypass graft(s), unspecified, with angina pectoris… ICD-10-CM](https://billingbrief.com/icd10/i25.701/)
-   [`I25.702` Atherosclerosis of coronary artery bypass graft(s), unspecified, with refractory angina… ICD-10-CM](https://billingbrief.com/icd10/i25.702/)
-   [`I25.708` Atherosclerosis of coronary artery bypass graft(s), unspecified, with other forms of… ICD-10-CM](https://billingbrief.com/icd10/i25.708/)

## Common questions

### Is I25.6 a billable code?

Yes. I25.6 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/icd-10-codes).
ICD-10-CM FY2027 (effective October 1, 2026).

Code set

ICD-10-CM

Category

I25 Chronic ischemic heart disease

Chapter

Diseases of the circulatory system

Billable

Yes

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).