G71 vs M61

G71 (Primary disorders of muscles) compared with M61 (Calcification and ossification of muscle), 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. M61 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	M61Calcification and ossification of muscle
Billing status	Non-billable header Report instead: G71.00, G71.01, G71.02, G71.031, G71.032	Non-billable header Report instead: M61.00, M61.011, M61.012, M61.019, M61.021
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).	Calcification and ossification of muscle is a non-billable ICD-10-CM category code (M61).

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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