2026 ICD-10-CM Diagnosis Code M19.29Secondary osteoarthritis, other specified site

ICD-10-CM Codes›M00–M99›M15-M19›M19

ICD-10-CM M19.29
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M19.29 is a billable ICD-10-CM diagnosis code for secondary osteoarthritis, other specified site. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Osteoarthritis.

Code Identity

ICD-10-CM Code
M19.29
Billable Status
Yes — Valid for Submission
Code Describes
Secondary osteoarthritis, other specified site
Short Description
Secondary osteoarthritis, other specified site
Same as the full description in the CMS dataset.
Parent Code
M19.2
Secondary osteoarthritis of other joints

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM15-M19Osteoarthritis
CategoryM19Other and unspecified osteoarthritis
This CodeM19.29Secondary osteoarthritis, other specified site

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Osteoarthritis
      • secondary
        • specified site NEC

Clinical ClassificationClinical

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

CCSR MUS006
Osteoarthritis
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Osteoarthritis

Osteoarthritis, sometimes called OA, is a type of arthritis that only affects the joints, usually in the hands, knees, hips, neck, and lower back. It's the most common type of arthritis.

The full article covers:

  • What is osteoarthritis?
  • What are the symptoms of osteoarthritis?
  • What causes osteoarthritis?
  • Who is more likely to develop osteoarthritis?
  • How is osteoarthritis diagnosed?
  • What are the treatments for osteoarthritis?

Read the full article at MedlinePlus

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

Code History & ChangesHistory

Replacement M19.29 replaces the following previously assigned code(s):

  • M19.93 - Secondary osteoarthritis, unspecified site
FY 2021AddedAdded to the ICD-10-CM code setEffective October 1, 2020.
FY 2022–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M19.29Overview

Is M19.29 (Secondary osteoarthritis of other joints) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report secondary osteoarthritis, other specified site on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M19.29 group to?

When secondary osteoarthritis, other specified site 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.

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.