2026 ICD-10-CM Diagnosis Code M19Other and unspecified osteoarthritis

ICD-10-CM Codes›M00–M99›M15-M19›M19

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

M19 is a non-billable ICD-10-CM category code for other and unspecified osteoarthritis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as M19.011, M19.012, M19.019, and M19.021.

Code Identity

ICD-10-CM Code
M19
Billable Status
No — Non-Billable Category
Code Describes
Other and unspecified osteoarthritis
Chapter
M15-M19
Osteoarthritis

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM15-M19Osteoarthritis
CategoryM19Other and unspecified osteoarthritis
This CodeM19Other and unspecified osteoarthritis

Specific Coding for Other and unspecified osteoarthritisOverview

Non-specific codes like M19 require more characters. Use one of these billable codes instead:

  • M19.0 for Primary osteoarthritis of other joints

  • M19.01 for Primary osteoarthritis, shoulder

  • M19.02 for Primary osteoarthritis, elbow

  • M19.03 for Primary osteoarthritis, wrist

  • M19.04 for Primary osteoarthritis, hand

  • M19.07 for Primary osteoarthritis ankle and foot

  • Use M19.09 for Primary osteoarthritis, other specified site

  • M19.1 for Post-traumatic osteoarthritis of other joints

  • M19.11 for Post-traumatic osteoarthritis, shoulder

  • M19.12 for Post-traumatic osteoarthritis, elbow

  • M19.13 for Post-traumatic osteoarthritis, wrist

  • M19.14 for Post-traumatic osteoarthritis, hand

  • M19.17 for Post-traumatic osteoarthritis, ankle and foot

  • Use M19.19 for Post-traumatic osteoarthritis, other specified site

  • M19.2 for Secondary osteoarthritis of other joints

  • M19.21 for Secondary osteoarthritis, shoulder

  • M19.22 for Secondary osteoarthritis, elbow

  • M19.23 for Secondary osteoarthritis, wrist

  • M19.24 for Secondary osteoarthritis, hand

  • M19.27 for Secondary osteoarthritis, ankle and foot

  • Use M19.29 for Secondary osteoarthritis, other specified site

  • M19.9 for Osteoarthritis, unspecified site

  • Use M19.90 for Unspecified osteoarthritis, unspecified site

  • Use M19.91 for Primary osteoarthritis, unspecified site

  • Use M19.92 for Post-traumatic osteoarthritis, unspecified site

  • Use M19.93 for Secondary osteoarthritis, unspecified site

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • polyarthritis M15

Type 2 Excludes

  • arthrosis of spine M47
  • hallux rigidus M20.2
  • osteoarthritis of spine M47

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 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 M19Overview

Is M19 (Other and unspecified osteoarthritis) a billable code?

No. This is a category header that groups the codes for other and unspecified osteoarthritis, and headers cannot be submitted on claims. Claims for other and unspecified osteoarthritis need a more specific code from this category, such as M19.011, M19.012, and M19.019.