2026 ICD-10-CM Diagnosis Code M12.562Traumatic arthropathy, left knee

ICD-10-CM Codes›M00–M99›M05-M14›M12

ICD-10-CM M12.562
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M12.562 is a billable ICD-10-CM diagnosis code for traumatic arthropathy, left knee. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 553 through 554. Coders also document this condition as gonarthrosis of left knee due to and following trauma. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Traumatic arthropathy.

Code Identity

ICD-10-CM Code
M12.562
Billable Status
Yes — Valid for Submission
Code Describes
Traumatic arthropathy, left knee
Short Description
Traumatic arthropathy, left knee
Same as the full description in the CMS dataset.
Parent Code
M12.56
Traumatic arthropathy, knee

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM05-M14Inflammatory polyarthropathies
CategoryM12Other and unspecified arthropathy
This CodeM12.562Traumatic arthropathy, left knee

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Gonarthrosis of left knee due to and following trauma
  • Gonarthrosis of right knee due to and following trauma
  • Osteoarthritis of knee due to and following trauma
  • Post-traumatic gonarthrosis, bilateral

Clinical ClassificationClinical

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

CCSR MUS031
Traumatic arthropathy
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 M12.562 to ICD-9-CMHistory

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

ICD-9-CM
716.16 Traum arthropathy-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 M12.562Overview

Is M12.562 (Traumatic arthropathy, knee) a billable code?

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

What MS-DRG does M12.562 group to?

When traumatic arthropathy, left knee is the principal diagnosis on an inpatient stay, it groups to MS-DRG 553, 554, with relative weights from 0.8301 to 1.2963 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M12.562?

Under the General Equivalence Mappings, traumatic arthropathy, left knee converts to ICD-9-CM 716.16 (traum arthropathy-l/leg). 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.