2026 ICD-10-CM Diagnosis Code M71.462Calcium deposit in bursa, left knee

ICD-10-CM Codes›M00–M99›M70-M79›M71

ICD-10-CM M71.462
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M71.462 is a billable ICD-10-CM diagnosis code for calcium deposit in bursa, left knee. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 557 through 558. Coders also document this condition as calcium deposit in bursa of bilateral knees. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified connective tissue disease.

Code Identity

ICD-10-CM Code
M71.462
Billable Status
Yes — Valid for Submission
Code Describes
Calcium deposit in bursa, left knee
Short Description
Calcium deposit in bursa, left knee
Same as the full description in the CMS dataset.
Parent Code
M71.46
Calcium deposit in bursa, knee

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM70-M79Other soft tissue disorders
CategoryM71Other bursopathies
This CodeM71.462Calcium deposit in bursa, left knee

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Calcium deposit in bursa of bilateral knees
  • Calcium deposit in bursa of knee
  • Calcium deposit in bursa of left knee
  • Calcium deposit in bursa of right knee

Clinical ClassificationClinical

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

CCSR MUS025
Other specified connective tissue disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Knee Injuries and Disorders

Your knee joint is made up of bone, cartilage, ligaments and fluid. Muscles and tendons help the knee joint move. When any of these structures is hurt or diseased, you have knee problems. Knee problems can cause pain and difficulty walking.

Read the full article at MedlinePlus

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

Convert M71.462 to ICD-9-CMHistory

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

ICD-9-CM
727.82 Calcium deposit tendon
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 M71.462Overview

Is M71.462 (Calcium deposit in bursa, knee) a billable code?

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

What MS-DRG does M71.462 group to?

When calcium deposit in bursa, left knee is the principal diagnosis on an inpatient stay, it groups to MS-DRG 557, 558, with relative weights from 0.8932 to 1.4869 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M71.462?

Under the General Equivalence Mappings, calcium deposit in bursa, left knee converts to ICD-9-CM 727.82 (calcium deposit tendon). 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.