M63.83 Disorders of muscle in diseases classified elsewhere, forearm

Non-billable header with 3 child codes.

Applies from M63 Disorders of muscle in diseases classified elsewhere

Excludes1 (never code together)

• myopathy in cysticercosis (B69.81)
• myopathy in endocrine diseases (G73.7)
• myopathy in metabolic diseases (G73.7)
• myopathy in sarcoidosis (D86.87)
• myopathy in secondary syphilis (A51.49)
• myopathy in syphilis (late) (A52.78)
• myopathy in toxoplasmosis (B58.82)
• myopathy in tuberculosis (A18.09)

Code first

• underlying disease, such as:
• leprosy (A30.-)
• neoplasm (C49.-, C79.89, D21.-, D48.1-)
• schistosomiasis (B65.-)
• trichinellosis (B75)

Codes under M63.83

• M63.831 Disorders of muscle in diseases classified elsewhere, right forearm
• M63.832 Disorders of muscle in diseases classified elsewhere, left forearm
• M63.839 Disorders of muscle in diseases classified elsewhere, unspecified forearm

Diagnosis Index entries for M63.83

• Leprosy › with muscle disorder › forearm
• Schistosomiasis › with muscle disorder › forearm
• Trichinellosis, trichiniasis, trichinelliasis, trichinosis › with muscle disorder › forearm

Nearby codes

• M63.819 Disorders of muscle in diseases classified elsewhere, unspecified shoulder
• M63.82 Disorders of muscle in diseases classified elsewhere, upper arm
• M63.821 Disorders of muscle in diseases classified elsewhere, right upper arm
• M63.822 Disorders of muscle in diseases classified elsewhere, left upper arm
• M63.829 Disorders of muscle in diseases classified elsewhere, unspecified upper arm
• M63.83 Disorders of muscle in diseases classified elsewhere, forearm (this code)
• M63.831 Disorders of muscle in diseases classified elsewhere, right forearm
• M63.832 Disorders of muscle in diseases classified elsewhere, left forearm
• M63.839 Disorders of muscle in diseases classified elsewhere, unspecified forearm
• M63.84 Disorders of muscle in diseases classified elsewhere, hand
• M63.841 Disorders of muscle in diseases classified elsewhere, right hand