ICD-10-CM M63: Disorders of muscle in diseases classified elsewhere

ICD-10-CM Diagnosis Code (2025)

Official Description for M63

Disorders of muscle in diseases classified elsewhere

Coding Notes & Guidelines for M63

Excludes1: Not Coded Here
  • 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)

Child Codes (More Specific Codes for M63):

M63.8 - Disorders of muscle in diseases classified elsewhere M63.80 - Disorders of muscle in diseases classified elsewhere, unspecified site M63.81 - Disorders of muscle in diseases classified elsewhere, shoulder M63.811 - Disorders of muscle in diseases classified elsewhere, right shoulder M63.812 - Disorders of muscle in diseases classified elsewhere, left shoulder 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 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 M63.842 - Disorders of muscle in diseases classified elsewhere, left hand M63.849 - Disorders of muscle in diseases classified elsewhere, unspecified hand M63.85 - Disorders of muscle in diseases classified elsewhere, thigh M63.851 - Disorders of muscle in diseases classified elsewhere, right thigh M63.852 - Disorders of muscle in diseases classified elsewhere, left thigh M63.859 - Disorders of muscle in diseases classified elsewhere, unspecified thigh M63.86 - Disorders of muscle in diseases classified elsewhere, lower leg M63.861 - Disorders of muscle in diseases classified elsewhere, right lower leg M63.862 - Disorders of muscle in diseases classified elsewhere, left lower leg M63.869 - Disorders of muscle in diseases classified elsewhere, unspecified lower leg M63.87 - Disorders of muscle in diseases classified elsewhere, ankle and foot M63.871 - Disorders of muscle in diseases classified elsewhere, right ankle and foot M63.872 - Disorders of muscle in diseases classified elsewhere, left ankle and foot M63.879 - Disorders of muscle in diseases classified elsewhere, unspecified ankle and foot M63.88 - Disorders of muscle in diseases classified elsewhere, other site M63.89 - Disorders of muscle in diseases classified elsewhere, multiple sites

About ICD-10-CM Code M63 (Disorders of muscle in diseases classified elsewhere)

ICD-10-CM code M63 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM M63 became effective on October 1, 2024.

This page provides detailed information about M63 - Disorders of muscle in diseases classified elsewhere. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Disorders of muscle in diseases classified elsewhere.