2026 ICD-10-CM Diagnosis Code M22.10Recurrent subluxation of patella, unspecified knee

ICD-10-CM Codes›M00–M99›M20-M25›M22

ICD-10-CM M22.10
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M22.10 is a billable ICD-10-CM diagnosis code for recurrent subluxation of patella, unspecified knee. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 562 through 563. Coders also document this condition as recurrent dislocation of knee. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified joint disorders.

Code Identity

ICD-10-CM Code
M22.10
Billable Status
Yes — Valid for Submission
Code Describes
Recurrent subluxation of patella, unspecified knee
Short Description
Recurrent subluxation of patella, unspecified knee
Same as the full description in the CMS dataset.
Parent Code
M22.1
Recurrent subluxation of patella

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM20-M25Other joint disorders
CategoryM22Disorder of patella
This CodeM22.10Recurrent subluxation of patella, unspecified knee

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Recurrent dislocation of knee
  • Recurrent dislocation of the patellofemoral joint
  • Recurrent subluxation of the patella

Clinical ClassificationClinical

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

CCSR MUS007
Other specified joint disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Dislocations

Dislocations are joint injuries that force the ends of your bones out of position. The cause is often a fall or a blow, sometimes from playing a contact sport. You can dislocate your ankles, knees, shoulders, hips, elbows and jaw. You can also dislocate your finger and toe joints.

Read the full article at MedlinePlus

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

Convert M22.10 to ICD-9-CMHistory

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

ICD-9-CM
718.36 Recur dislocat-l/leg
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 M22.10Overview

Is M22.10 (Recurrent subluxation of patella) a billable code?

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

What MS-DRG does M22.10 group to?

When recurrent subluxation of patella, unspecified knee is the principal diagnosis on an inpatient stay, it groups to MS-DRG 562, 563, with relative weights from 0.8955 to 1.4248 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M22.10?

Under the General Equivalence Mappings, recurrent subluxation of patella, unspecified knee converts to ICD-9-CM 718.36 (recur dislocat-l/leg). 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.