ICD-10-CM 2027
ICD-10 code for polyarthritis atrophy
From the official ICD-10-CM alphabetic index entry “Atrophy, atrophic (of) › polyarthritis”. Page updated September 29, 2026.
About coding polyarthritis atrophy
The ICD-10-CM code for polyarthritis atrophy is M15.9 (Polyosteoarthritis, unspecified).
Within M15, choose M15.9 (unspecified) only when documentation doesn't support a more specific option: primary generalized (osteo)arthritis (M15.0), Heberden's nodes (with arthropathy) (M15.1), Bouchard's nodes (with arthropathy) (M15.2), secondary multiple arthritis (M15.3), Erosive (osteo)arthritis (M15.4) and other polyosteoarthritis (M15.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 553 (Bone Diseases and Arthropathies with MCC, relative weight 1.2494) and DRG 554 (Bone Diseases and Arthropathies without MCC, relative weight 0.8331), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about polyarthritis atrophy ICD-10 codes
What is the ICD-10 code for polyarthritis atrophy?
- M15.9 — Polyosteoarthritis, unspecified.
Is M15.9 billable?
- Yes. M15.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M15.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M15.9 as a principal diagnosis.
Is M15.9 a CC or MCC?
- No. M15.9 is neither a CC nor an MCC under MS-DRG v44.0.