M15.4 Erosive (osteo)arthritis

Billable ICD-10-CM code, FY2026.

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)

• 715.80 Osteoarthrosis involving, or with mention of more than one site, but not specified as generalized, site unspecified (approximate)

Code annotations containing back-references to M15.4

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 M15.4

• Osteoarthritis › generalized (multiple joints) › erosive
• Osteoarthrosis (degenerative) (hypertrophic) (joint) › erosive

Nearby codes

• M15 Polyosteoarthritis
• M15.0 Primary generalized (osteo)arthritis
• M15.1 Heberden's nodes (with arthropathy)
• M15.2 Bouchard's nodes (with arthropathy)
• M15.3 Secondary multiple arthritis
• M15.4 Erosive (osteo)arthritis (this code)
• M15.8 Other polyosteoarthritis
• M15.9 Polyosteoarthritis, unspecified