Non-Billable / Non-Specific Code
ICD-10-CM M63 is the diagnosis code for Disorders of muscle in diseases classified elsewhere. This code falls under the section "Disorders of muscles" within Chapter 13 — Diseases of the musculoskeletal system and connective tissue (M00-M99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as M63. They are mutually exclusive:
Understanding where M63 sits in the ICD-10-CM classification helps ensure proper coding:
No, M63 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
M63 is the ICD-10-CM diagnosis code for "Disorders of muscle in diseases classified elsewhere". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
M63 is located in Section M60-M63 — "Disorders of muscles" within Chapter 13 of the ICD-10-CM Tabular List.
M63 has 1 sub-code(s) that provide more specific detail: M63.8.
Use M63 when the patients documented diagnosis matches "Disorders of muscle in diseases classified elsewhere" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Disorders of muscle in diseases classified elsewhere is M63.
No, M63 is non-billable. Use a more specific sub-code for primary diagnosis billing.
M63 is in Chapter 13 of the ICD-10-CM Tabular List.
Type 1 Excludes for M63 include: myopathy in cysticercosis (B69.81); myopathy in endocrine diseases (G73.7); myopathy in metabolic diseases (G73.7) and more.
Yes, M63 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.