M62.85 Dysfunction of the multifidus muscles, lumbar region

Billable ICD-10-CM code, FY2026.

Applies from M62 Other disorders of muscle

Excludes1 (never code together)

• alcoholic myopathy (G72.1)
• cramp and spasm (R25.2)
• drug-induced myopathy (G72.0)
• myalgia (M79.1-)
• stiff-man syndrome (G25.82)

Excludes2 (not included here)

• nontraumatic hematoma of muscle (M79.81)

Applies from M62.8 Other specified disorders of muscle

Excludes2 (not included here)

• nontraumatic hematoma of muscle (M79.81)

MS-DRG index

Defines the logic of DRG(s) 557-558 in MDC 08.

Diagnosis Index entries for M62.85

• Dysfunction › multifidus muscles, lumbar region

Nearby codes

• M62.83 Muscle spasm
• M62.830 Muscle spasm of back
• M62.831 Muscle spasm of calf
• M62.838 Other muscle spasm
• M62.84 Sarcopenia
• M62.85 Dysfunction of the multifidus muscles, lumbar region (this code)
• M62.89 Other specified disorders of muscle
• M62.9 Disorder of muscle, unspecified