M13.10 Monoarthritis, not elsewhere classified, unspecified site

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)

• 716.60 Unspecified monoarthritis, site unspecified (approximate)
• 716.68 Unspecified monoarthritis, other specified sites (approximate)

Diagnosis Index entries for M13.10

• Monoarthritis

Nearby codes

• M13 Other arthritis
• M13.0 Polyarthritis, unspecified
• M13.1 Monoarthritis, not elsewhere classified
• M13.10 Monoarthritis, not elsewhere classified, unspecified site (this code)
• M13.11 Monoarthritis, not elsewhere classified, shoulder
• M13.111 Monoarthritis, not elsewhere classified, right shoulder
• M13.112 Monoarthritis, not elsewhere classified, left shoulder
• M13.119 Monoarthritis, not elsewhere classified, unspecified shoulder
• M13.12 Monoarthritis, not elsewhere classified, elbow