M79.0 Rheumatism, unspecified

Billable ICD-10-CM code, FY2026.

Excludes1 (never code together)

• fibromyalgia (M79.7)
• palindromic rheumatism (M12.3-)

Applies from M79 Other and unspecified soft tissue disorders, not elsewhere classified

Excludes1 (never code together)

• psychogenic rheumatism (F45.8)
• soft tissue pain, psychogenic (F45.41)

MS-DRG index

Defines the logic of DRG(s) 555-556 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 729.0 Rheumatism, unspecified and fibrositis

Diagnosis Index entries for M79.0

• Rheumatism (articular) (neuralgic) (nonarticular)

Nearby codes

• M79 Other and unspecified soft tissue disorders, not elsewhere classified
• M79.0 Rheumatism, unspecified (this code)
• M79.1 Myalgia
• M79.10 Myalgia, unspecified site
• M79.11 Myalgia of mastication muscle
• M79.12 Myalgia of auxiliary muscles, head and neck
• M79.18 Myalgia, other site