G51 — Facial nerve disorders
Is G51 billable?
No — G51 is a non-billable header code. G51 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 10 billable codes beneath G51.
Billable codes under this header
- G51.0Bell's palsy
- G51.1Geniculate ganglionitis
- G51.2Melkersson's syndrome
- G51.4Facial myokymia
- G51.8Other disorders of facial nerve
- G51.9Disorder of facial nerve, unspecified
- G51.31Clonic hemifacial spasm, right
- G51.32Clonic hemifacial spasm, left
- G51.33Clonic hemifacial spasm, bilateral
- G51.39Clonic hemifacial spasm, unspecified
G51 at a glance
| Code | G51 |
|---|---|
| Description | Facial nerve disorders |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Includes
Conditions classified to G51.
- disorders of 7th cranial nerve
Excludes1 — never code together — inherited from G50-G59
The conditions below can never be reported together with G51 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 6
The conditions below are not part of G51, but a patient may have both at the same time. When documentation supports it, G51 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
What codes fall under G51? (7)
How long has G51 existed?
G51 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.