M13.121 Monoarthritis, not elsewhere classified, right elbow

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)

• 716.62 Unspecified monoarthritis, upper arm (approximate)

Nearby codes

• 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
• M13.121 Monoarthritis, not elsewhere classified, right elbow (this code)
• M13.122 Monoarthritis, not elsewhere classified, left elbow
• M13.129 Monoarthritis, not elsewhere classified, unspecified elbow
• M13.13 Monoarthritis, not elsewhere classified, wrist
• M13.131 Monoarthritis, not elsewhere classified, right wrist
• M13.132 Monoarthritis, not elsewhere classified, left wrist