M12.379 Palindromic rheumatism, unspecified ankle and foot

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)

• 719.37 Palindromic rheumatism, ankle and foot (approximate)

Code annotations containing back-references to M12.379

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

• M12.362 Palindromic rheumatism, left knee
• M12.369 Palindromic rheumatism, unspecified knee
• M12.37 Palindromic rheumatism, ankle and foot
• M12.371 Palindromic rheumatism, right ankle and foot
• M12.372 Palindromic rheumatism, left ankle and foot
• M12.379 Palindromic rheumatism, unspecified ankle and foot (this code)
• M12.38 Palindromic rheumatism, other specified site
• M12.39 Palindromic rheumatism, multiple sites
• M12.4 Intermittent hydrarthrosis
• M12.40 Intermittent hydrarthrosis, unspecified site
• M12.41 Intermittent hydrarthrosis, shoulder