2026 ICD-10-CM Diagnosis Code M71.061Abscess of bursa, right knee

ICD-10-CM Codes›M00–M99›M70-M79›M71

ICD-10-CM M71.061
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M71.061 is a billable ICD-10-CM diagnosis code for abscess of bursa, right knee. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 485 through 487, 557 through 558. Coders also document this condition as abscess of bursa of bilateral knees. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Musculoskeletal abscess and Other specified connective tissue disease.

Code Identity

ICD-10-CM Code
M71.061
Billable Status
Yes — Valid for Submission
Code Describes
Abscess of bursa, right knee
Short Description
Abscess of bursa, right knee
Same as the full description in the CMS dataset.
Parent Code
M71.06
Abscess of bursa, knee

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM70-M79Other soft tissue disorders
CategoryM71Other bursopathies
This CodeM71.061Abscess of bursa, right knee

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abscess of bursa of bilateral knees
  • Abscess of bursa of knee
  • Abscess of bursa of left knee
  • Abscess of bursa of right knee
  • Abscess of knee

Clinical ClassificationClinical

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

CCSR MUS027
Musculoskeletal abscess
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR MUS025
Other specified connective tissue disease
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Abscess

An abscess is a pocket of pus. You can get an abscess almost anywhere in your body. When an area of your body becomes infected, your body's immune system tries to fight the infection. White blood cells go to the infected area, collect within the damaged tissue, and cause inflammation. During this process, pus forms.

Read the full article at MedlinePlus

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

Convert M71.061 to ICD-9-CMHistory

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

ICD-9-CM
727.89 Synov/tend/bursa dis NEC
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 M71.061Overview

Is M71.061 (Abscess of bursa, knee) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report abscess of bursa, right knee on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M71.061 group to?

When abscess of bursa, right knee is the principal diagnosis on an inpatient stay, it groups to MS-DRG 485, 486, 487, 557, 558, with relative weights from 0.8932 to 3.2271 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M71.061?

Under the General Equivalence Mappings, abscess of bursa, right knee converts to ICD-9-CM 727.89 (synov/tend/bursa dis NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.