M79.12 Myalgia of auxiliary muscles, head and neck

Billable ICD-10-CM code, FY2026.

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)

Applies from M79.1 Myalgia

Applicable to

• Myofascial pain syndrome

Excludes1 (never code together)

• fibromyalgia (M79.7)
• myositis (M60.-)

MS-DRG index

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

Code annotations containing back-references to M79.12

Back-references to M79.1

• Type 2 Excludes: G89 Pain, not elsewhere classified ("myalgia (M79.1-)")
• Type 1 Excludes: M62 Other disorders of muscle ("myalgia (M79.1-)")

Diagnosis Index entries for M79.12

• Myalgia › auxiliary muscles, head and neck

Nearby codes

• M79 Other and unspecified soft tissue disorders, not elsewhere classified
• M79.0 Rheumatism, unspecified
• M79.1 Myalgia
• M79.10 Myalgia, unspecified site
• M79.11 Myalgia of mastication muscle
• M79.12 Myalgia of auxiliary muscles, head and neck (this code)
• M79.18 Myalgia, other site
• M79.2 Neuralgia and neuritis, unspecified
• M79.3 Panniculitis, unspecified
• M79.4 Hypertrophy of (infrapatellar) fat pad
• M79.5 Residual foreign body in soft tissue