2026 ICD-10-CM Diagnosis Code M12.542Traumatic arthropathy, left hand

ICD-10-CM Codes›M00–M99›M05-M14›M12

ICD-10-CM M12.542
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M12.542 is a billable ICD-10-CM diagnosis code for traumatic arthropathy, left hand. 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 arthritis of finger of left hand. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Traumatic arthropathy.

Code Identity

ICD-10-CM Code
M12.542
Billable Status
Yes — Valid for Submission
Code Describes
Traumatic arthropathy, left hand
Short Description
Traumatic arthropathy, left hand
Same as the full description in the CMS dataset.
Parent Code
M12.54
Traumatic arthropathy, hand

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM05-M14Inflammatory polyarthropathies
CategoryM12Other and unspecified arthropathy
This CodeM12.542Traumatic arthropathy, left hand

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Arthritis of finger of left hand
  • Arthritis of finger of left hand due to trauma

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

Hand Injuries and Disorders

No matter how old you are or what you do for a living, you are always using your hands. When there is something wrong with them, you may not be able to do your regular activities.

Read the full article at MedlinePlus

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

Convert M12.542 to ICD-9-CMHistory

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

ICD-9-CM
716.14 Traum arthropathy-hand
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 M12.542Overview

Is M12.542 (Traumatic arthropathy, hand) a billable code?

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

What MS-DRG does M12.542 group to?

When traumatic arthropathy, left hand 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 M12.542?

Under the General Equivalence Mappings, traumatic arthropathy, left hand converts to ICD-9-CM 716.14 (traum arthropathy-hand). 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.