Polyosteoarthritis (M15) ICD-10-CM
The M15 code range covers polyosteoarthritis with 8 ICD-10-CM diagnosis codes. 7 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- arthritis of multiple sites
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the M15 Range 8 codes · 7 billable
About the M15 Code Range
ICD-10 code M15 covers various types of polyosteoarthritis, a condition involving osteoarthritis affecting multiple joints. These codes help specify whether the osteoarthritis is primary, involves specific finger joint deformities like Heberden's nodes (M15.1) or Bouchard's nodes (M15.2), or represents other forms such as erosive or secondary arthritis.
The ICD-10 code for polyosteoarthritis includes subcodes that clarify the cause and presentation. For example, M15.0 is used for primary generalized osteoarthritis, also called idiopathic osteoarthritis, without a known secondary cause. M15.1 identifies Heberden's nodes, which are bony swellings at the end finger joints, while M15.2 notes Bouchard's nodes, swelling in the middle finger joints. The code M15.3 applies to secondary multiple arthritis, emerging due to another disease. Erosive osteoarthritis, characterized by joint erosions, is coded as M15.4. For other or unspecified forms affecting several joints, M15.8 and M15.9 are used. These codes guide accurate documentation when coding for degenerative joint disease involving multiple joints and aid healthcare professionals in recording precise clinical diagnoses.
Questions About This Page
How many billable codes are in the M15 range?
Of the 8 codes in this range, 7 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the M15 range classify?
The range classifies polyosteoarthritis. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
