Is ICD-10-CM code G51 billable?

No, G51 (Facial nerve disorders) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code G51 belong to?

G51 belongs to Chapter 6 of the ICD-10-CM tabular list: G00–G99 (Diseases of the Nervous System).

G51Not billable, use a more specific code below

Facial nerve disorders

In Nerve, nerve root and plexus disorders (G50-G59), chapter 6: Diseases of the Nervous System

10 billable codes under G51: none are a CC or MCC; none map to an HCC.

Instructional notes

Includes: conditions that are coded here

disorders of 7th cranial nerve

Also applies, from Nerve, nerve root and plexus disorders (G50-G59)

These notes sit on G50-G59 and apply to every code under it, including G51.

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-)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers default dominant or nondominant side for hemiplegia and monoplegia, and use and sequencing of G89 pain codes, including postoperative, chronic, and neoplasm-related pain.

Dominant/nondominant side (page 45)
Pain - Category G89 (page 45)

Read Section I.C.6 (page 45)

All codes under G51

G51 can't be used on a claim. Pick a billable code below; grey headings group them.

G51 MS-DRGs

As the principal diagnosis, all 10 billable codes under G51 group to MS-DRG 073 or 074 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Facial Injuries and Disorders

Face injuries and disorders can cause pain and affect how you look. In severe cases, they can affect sight, speech, breathing and your ability to swallow. Fractures (broken bones), especially in the bones of your nose, cheekbone and jaw, are common facial injuries.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.