ICD-10-CM > M00-M99 > M60-M63 > M63 > M63.8 > M63.84 M63.84 Disorders of muscle in diseases classified elsewhere, hand Non-Billable/Non-Specific Codes M63.841Disorders of muscle in diseases classified elsewhere, right handM63.842Disorders of muscle in diseases classified elsewhere, left handM63.849Disorders of muscle in diseases classified elsewhere, unspecified hand