2026 ICD-10-CM Diagnosis Code M06.279Rheumatoid bursitis, unspecified ankle and foot

ICD-10-CM Codes›M00–M99›M05-M14›M06

ICD-10-CM M06.279
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M06.279 is a billable ICD-10-CM diagnosis code for rheumatoid bursitis, unspecified ankle and foot. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 545 through 547. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Rheumatoid arthritis and related disease.

Code Identity

ICD-10-CM Code
M06.279
Billable Status
Yes — Valid for Submission
Code Describes
Rheumatoid bursitis, unspecified ankle and foot
Short Description
Rheumatoid bursitis, unspecified ankle and foot
Same as the full description in the CMS dataset.
Parent Code
M06.27
Rheumatoid bursitis, ankle and foot

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM05-M14Inflammatory polyarthropathies
CategoryM06Other rheumatoid arthritis
This CodeM06.279Rheumatoid bursitis, unspecified ankle and foot

Clinical ClassificationClinical

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

CCSR MUS003
Rheumatoid arthritis and related disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Bursitis

A bursa is a small, fluid-filled sac that acts as a cushion between a bone and other moving parts, such as muscles, tendons, or skin. Bursitis occurs when a bursa becomes inflamed. People get bursitis by overusing a joint. It can also be caused by an injury. It usually occurs at the knee or elbow.

Read the full article at MedlinePlus

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

Convert M06.279 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
714.0 Rheumatoid arthritis
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M06.279Overview

Is M06.279 (Rheumatoid bursitis, ankle and foot) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report rheumatoid bursitis, unspecified ankle and foot on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M06.279 group to?

When rheumatoid bursitis, unspecified ankle and foot is the principal diagnosis on an inpatient stay, it groups to MS-DRG 545, 546, 547, with relative weights from 0.8362 to 2.4817 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M06.279?

Under the General Equivalence Mappings, rheumatoid bursitis, unspecified ankle and foot converts to ICD-9-CM 714.0 (rheumatoid arthritis). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.