ICD-10-CM 2027
ICD-10 code for facial neuritis
From the official ICD-10-CM alphabetic index entry “Neuritis (rheumatoid) › facial”. Page updated September 29, 2026.
About coding facial neuritis
The ICD-10-CM code for facial neuritis is G51.8 (Other disorders of facial nerve). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on G51.8.
Within G51, choose G51.8 (Other disorders of facial nerve) only when documentation doesn't support a more specific option: Bell's palsy (G51.0), geniculate ganglionitis (G51.1), Melkersson's syndrome (G51.2), Clonic hemifacial spasm (G51.3), facial myokymia (G51.4) and disorder of facial nerve, unspecified (G51.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 073 (Cranial and Peripheral Nerve Disorders with MCC, relative weight 1.5779) and DRG 074 (Cranial and Peripheral Nerve Disorders without MCC, relative weight 1.0173), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific facial neuritis codes (official index)
- newborn (birth injury) P11.3 — Birth injury to facial nerve
Common questions about facial neuritis ICD-10 codes
What is the ICD-10 code for facial neuritis?
- G51.8 — Other disorders of facial nerve. More specific codes apply when the documentation supports them: P11.3.
What is the ICD-10 code for newborn facial neuritis?
- P11.3 — Birth injury to facial nerve.
Is G51.8 billable?
- Yes. G51.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G51.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G51.8 as a principal diagnosis.
Is G51.8 a CC or MCC?
- No. G51.8 is neither a CC nor an MCC under MS-DRG v44.0.