G71 vs M60

G71 (Primary disorders of muscles) compared with M60 (Myositis), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).

Can these codes be reported together?

Yes, when both are documented. G71 carries an Excludes2 note covering M60: “myositis (M60.-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Yes, when both are documented. M60 carries an Excludes2 note covering G71: “muscular dystrophies and myopathies (G71-G72)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Side by side

	G71Primary disorders of muscles	M60Myositis
Billing status	Non-billable header Report instead: G71.00, G71.01, G71.02, G71.031, G71.032	Non-billable header Report instead: M60.000, M60.001, M60.002, M60.003, M60.004
Classification	G00-G99 — Diseases of the Nervous System (G00-G99)	M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)
Definition	Primary disorders of muscles is a non-billable ICD-10-CM category code (G71).	Myositis is a non-billable ICD-10-CM category code (M60).

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources