M12.312 Palindromic rheumatism, left shoulder

Billable ICD-10-CM code, FY2026.

Applies from M12 Other and unspecified arthropathy

Excludes1 (never code together)

• arthrosis (M15-M19)
• cricoarytenoid arthropathy (J38.7)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 719.31 Palindromic rheumatism, shoulder region (approximate)

Code annotations containing back-references to M12.312

Back-references to M12.3

• Type 1 Excludes: M67.3 Transient synovitis ("palindromic rheumatism (M12.3-)")
• Type 1 Excludes: M79.0 Rheumatism, unspecified ("palindromic rheumatism (M12.3-)")

Nearby codes

• M12.29 Villonodular synovitis (pigmented), multiple sites
• M12.3 Palindromic rheumatism
• M12.30 Palindromic rheumatism, unspecified site
• M12.31 Palindromic rheumatism, shoulder
• M12.311 Palindromic rheumatism, right shoulder
• M12.312 Palindromic rheumatism, left shoulder (this code)
• M12.319 Palindromic rheumatism, unspecified shoulder
• M12.32 Palindromic rheumatism, elbow
• M12.321 Palindromic rheumatism, right elbow
• M12.322 Palindromic rheumatism, left elbow
• M12.329 Palindromic rheumatism, unspecified elbow