G51 vs M79.2
G51 (Facial nerve disorders) compared with M79.2 (Neuralgia and neuritis, unspecified), 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. G51 carries an Excludes1 note covering M79.2: “neuralgia NOS (M79.2)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. G51 carries an Excludes1 note covering M79.2: “neuritis NOS (M79.2)”
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
| G51Facial nerve disorders | M79.2Neuralgia and neuritis, unspecified | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | G00-G99 — Diseases of the Nervous System (G00-G99) | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) |
| Definition | Facial nerve disorders is a non-billable ICD-10-CM category code (G51). | Neuralgia and neuritis, unspecified is a billable ICD-10-CM diagnosis code (M79.2). |
| Includes | disorders of 7th cranial nerve | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources