All ICD10 Codes
G51Non-billable

Facial nerve disorders

Diseases of the Nervous System·Nerve, nerve root and plexus disorders (G50-G59)·category·FY 2026

Use a more specific code (6 billable, 1 non-billable)
G51.0Bell's palsyG51.1Geniculate ganglionitisG51.2Melkersson's syndromeG51.3Clonic hemifacial spasmhas subcodesG51.4Facial myokymiaG51.8Other disorders of facial nerveG51.9Disorder of facial nerve, unspecified

CH6 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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)

G50-G59 Parent Instructions

Excludes1(Not coded here. Use a different code.)
  • current traumatic nerve, nerve root and plexus disorders - see Injury, nerve by body region
  • neuralgia NOS (M79.2)
  • neuritis NOS (M79.2)
  • peripheral neuritis in pregnancy (O26.82-)
  • radiculitis NOS (M54.1-)

Instructional Notes

Includes
  • disorders of 7th cranial nerve

Clinical Hierarchy

BillableHas subcodes
CH6Diseases of the nervous system (G00-G99)
G50-G59Nerve, nerve root and plexus disorders (G50-G59)
G51Facial nerve disordersNot billable
G51.0Bell's palsyBillable
G51.1Geniculate ganglionitisBillable
G51.2Melkersson's syndromeBillable
G51.3Clonic hemifacial spasmSubcodes
G51.4Facial myokymiaBillable
G51.8Other disorders of facial nerveBillable
G51.9Disorder of facial nerve, unspecifiedBillable

MS-DRG Classification

2026

No direct MS-DRG triggers identified.