---
title: "ICD-10-CM I25.85: Chronic coronary microvascular dysfunction | BillingBrief"
description: "ICD-10-CM code I25.85: Chronic coronary microvascular dysfunction. Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/icd10/i25.85/"
language: "en"
---

# I25.85 Chronic coronary microvascular dysfunction

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

**Official ICD-10-CM description:** Chronic coronary microvascular dysfunction

## Coding notes

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

### Also covers

-   Chronic (presentation of) coronary microvascular disease
-   Coronary microvascular dysfunction NOS

### 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

-   [`I25.810` Atherosclerosis of coronary artery bypass graft(s) without angina pectoris ICD-10-CM](https://billingbrief.com/icd10/i25.810/)
-   [`I25.811` Atherosclerosis of native coronary artery of transplanted heart without angina pectoris ICD-10-CM](https://billingbrief.com/icd10/i25.811/)
-   [`I25.812` Atherosclerosis of bypass graft of coronary artery of transplanted heart without angina… ICD-10-CM](https://billingbrief.com/icd10/i25.812/)
-   [`I25.82` Chronic total occlusion of coronary artery ICD-10-CM](https://billingbrief.com/icd10/i25.82/)
-   [`I25.83` Coronary atherosclerosis due to lipid rich plaque ICD-10-CM](https://billingbrief.com/icd10/i25.83/)
-   [`I25.84` Coronary atherosclerosis due to calcified coronary lesion ICD-10-CM](https://billingbrief.com/icd10/i25.84/)
-   [`I25.89` Other forms of chronic ischemic heart disease ICD-10-CM](https://billingbrief.com/icd10/i25.89/)
-   [`I25.9` Chronic ischemic heart disease, unspecified ICD-10-CM](https://billingbrief.com/icd10/i25.9/)

## Common questions

### Is I25.85 a billable code?

Yes. I25.85 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/).