M13.0 Polyarthritis, unspecified

Billable ICD-10-CM code, FY2026.

Applies from M13 Other arthritis

Excludes1 (never code together)

• arthrosis (M15-M19)
• osteoarthritis (M15-M19)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 716.50 Unspecified polyarthropathy or polyarthritis, site unspecified (approximate)

Code annotations containing back-references to M13.0

Back-references to M13.0

• Type 1 Excludes: M06.4 Inflammatory polyarthropathy ("polyarthritis NOS (M13.0)")

Diagnosis Index entries for M13.0

• Polyarthritis, polyarthropathy

Nearby codes

• M13 Other arthritis
• M13.0 Polyarthritis, unspecified (this code)
• M13.1 Monoarthritis, not elsewhere classified
• M13.10 Monoarthritis, not elsewhere classified, unspecified site
• M13.11 Monoarthritis, not elsewhere classified, shoulder
• M13.111 Monoarthritis, not elsewhere classified, right shoulder
• M13.112 Monoarthritis, not elsewhere classified, left shoulder