What M60 covers · when clinicians use it
ICD-10 code M60 identifies Myositis in the U.S. ICD-10-CM clinical and billing record set. It sits within the Musculoskeletal System chapter (M00–M99), the section that groups related diagnoses so providers, payers, and public-health agencies report them consistently. Clinicians and medical coders apply M60 when an encounter's findings match the Myositis description, attaching it to the patient record so downstream insurance claims, payer audits, quality reporting, and epidemiological surveillance all reference the same standardized diagnosis. The ICD-10-CM is maintained by the Centers for Medicare & Medicaid Services and the CDC's National Center for Health Statistics, with an updated official code set released each U.S. fiscal year — always verify M60 against the current CMS/CDC release and your payer's documentation guidance before final use. This page summarizes documentation context for M60 and is a coding reference, not clinical, diagnostic, or billing advice.
M60 refers to Myositis, covering inflammatory, degenerative, and pathological conditions affecting skeletal muscle tissue. These disorders can cause muscle pain, weakness, reduced mobility, and long-term functional limitations if untreated.
Symptoms
- Muscle weakness – Primary symptom of myositis (M60) and other muscle disorders
- Muscle pain (myalgia) – Seen in inflammatory and metabolic myopathies (M62)
- Hard nodules or stiffness – Indicative of calcification/ossification (M61)
- Difficulty climbing stairs or lifting arms – Typical functional deficits
- Fatigue and systemic symptoms – Associated with inflammatory myopathies
Diagnosis
Diagnosis of Myositis includes clinical evaluation, serum creatine kinase (CK) levels, electromyography (EMG), MRI to detect muscle edema or fibrosis, and sometimes muscle biopsy to confirm inflammation, degeneration, or abnormal calcification.
ICD10 Code Usage
ICD10 code M60 is used by rheumatologists, neurologists, orthopedic specialists, and rehabilitation teams to document muscle disorders for medical records, insurance claims, and treatment planning including immunosuppressive therapies or physical rehabilitation.
Related Codes
- M61 – Calcification and ossification of muscle
- M62 – Other disorders of muscle
- M63 – Disorders of muscle in diseases classified elsewhere
FAQs
Q1: What is ICD10 code M60?
A: It refers to Myositis, encompassing inflammatory, degenerative, and systemic muscle disorders that impair mobility and strength.
Q2: What is myositis (M60)?
A: Inflammatory conditions of muscle tissue, including polymyositis and dermatomyositis, leading to muscle weakness and systemic symptoms.
Q3: What causes muscle calcification (M61)?
A: It can result from trauma, chronic inflammation, metabolic disturbances, or post-surgical changes, leading to hardening of muscles.
Q4: What are examples of M62 muscle disorders?
A: Muscle contractures, myopathies due to endocrine disorders, and other acquired or hereditary muscle dysfunctions.
Q5: Who typically treats muscle disorders?
A: Rheumatologists, neurologists, orthopedic specialists, and physiatrists (rehabilitation doctors).
Conclusion
ICD10 code M60 is essential for accurate classification and treatment of Myositis, helping guide targeted therapies to improve muscle strength, function, and overall patient mobility.