G57.6 vs M77.4

G57.6 (Lesion of plantar nerve) compared with M77.4 (Metatarsalgia), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.

Can these codes be reported together?

No — do not report together. M77.4 carries an Excludes1 note covering G57.6: “Morton's metatarsalgia (G57.6)”

Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Side by side

	G57.6Lesion of plantar nerve	M77.4Metatarsalgia
Billing status	Non-billable header Report instead: G57.60, G57.61, G57.62, G57.63	Non-billable header Report instead: M77.40, M77.41, M77.42
Classification	G00-G99 — Diseases of the Nervous System (G00-G99)	M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)
Definition	Lesion of plantar nerve is a non-billable ICD-10-CM category code (G57.6).	Metatarsalgia is a non-billable ICD-10-CM category code (M77.4).
Includes	Morton's metatarsalgia	—

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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