M15.9 Polyosteoarthritis, unspecified

Billable ICD-10-CM code, FY2026.

Applicable to

• Generalized osteoarthritis NOS

Applies from M15 Polyosteoarthritis

Includes

• arthritis of multiple sites

Excludes1 (never code together)

• bilateral involvement of single joint (M16-M19)

MS-DRG index

Defines the logic of DRG(s) 553-554 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 715.00 Osteoarthrosis, generalized, site unspecified (approximate)
• 715.90 Osteoarthrosis, unspecified whether generalized or localized, site unspecified (approximate)

Code annotations containing back-references to M15.9

Back-references to M15

• Type 1 Excludes: M12 Other and unspecified arthropathy ("arthrosis (M15-M19)")
• Type 1 Excludes: M13 Other arthritis ("arthrosis (M15-M19)")
• Type 1 Excludes: M13 Other arthritis ("osteoarthritis (M15-M19)")
• Type 1 Excludes: M13.8 Other specified arthritis ("osteoarthritis (M15-M19)")
• Type 1 Excludes: M19 Other and unspecified osteoarthritis ("polyarthritis (M15.-)")

Diagnosis Index entries for M15.9

• Atrophy, atrophic (of) › polyarthritis
• Disease, diseased › joint › degenerative › multiple
• Osteoarthritis › generalized (multiple joints)
• Osteoarthritis › primary › multiple sites
• Osteoarthrosis (degenerative) (hypertrophic) (joint) › generalized
• Osteoarthrosis (degenerative) (hypertrophic) (joint) › polyarticular
• Polyarthrosis
• Polyosteoarthritis

Nearby codes

• M15.1 Heberden's nodes (with arthropathy)
• M15.2 Bouchard's nodes (with arthropathy)
• M15.3 Secondary multiple arthritis
• M15.4 Erosive (osteo)arthritis
• M15.8 Other polyosteoarthritis
• M15.9 Polyosteoarthritis, unspecified (this code)