---
title: "ICD-10-CM M79.0: Rheumatism, unspecified | BillingBrief"
description: "ICD-10-CM code M79.0: Rheumatism, unspecified. Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/icd10/m79.0/"
language: "en"
---

# M79.0 Rheumatism, unspecified

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

**Official ICD-10-CM description:** Rheumatism, unspecified

## Coding notes

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

### Excludes1

Not coded together with this code. The exception is when the two conditions are unrelated to each other.

-   fibromyalgia ([M79.7](https://billingbrief.com/icd10/m79.7/))
-   palindromic rheumatism (M12.3-)
-   psychogenic rheumatism (F45.8)
-   soft tissue pain, psychogenic (F45.41)

## Related codes

-   [`M79.10` Myalgia, unspecified site ICD-10-CM](https://billingbrief.com/icd10/m79.10/)
-   [`M79.11` Myalgia of mastication muscle ICD-10-CM](https://billingbrief.com/icd10/m79.11/)
-   [`M79.12` Myalgia of auxiliary muscles, head and neck ICD-10-CM](https://billingbrief.com/icd10/m79.12/)
-   [`M79.18` Myalgia, other site ICD-10-CM](https://billingbrief.com/icd10/m79.18/)
-   [`M79.2` Neuralgia and neuritis, unspecified ICD-10-CM](https://billingbrief.com/icd10/m79.2/)
-   [`M79.3` Panniculitis, unspecified ICD-10-CM](https://billingbrief.com/icd10/m79.3/)
-   [`M79.4` Hypertrophy of (infrapatellar) fat pad ICD-10-CM](https://billingbrief.com/icd10/m79.4/)
-   [`M79.5` Residual foreign body in soft tissue ICD-10-CM](https://billingbrief.com/icd10/m79.5/)

## Common questions

### Is M79.0 a billable code?

Yes. M79.0 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

M79 Other and unspecified soft tissue disorders, not elsewhere classified

Chapter

Diseases of the musculoskeletal system and connective tissue

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/).