2022 ICD-10-CM Code G51.39

Clonic hemifacial spasm, unspecified

Version 2021

Valid for Submission

ICD-10:G51.39
Short Description:Clonic hemifacial spasm, unspecified
Long Description:Clonic hemifacial spasm, unspecified

Code Classification

  • Diseases of the nervous system (G00–G99)
    • Nerve, nerve root and plexus disorders (G50-G59)
      • Facial nerve disorders (G51)

G51.39 is a billable diagnosis code used to specify a medical diagnosis of clonic hemifacial spasm, unspecified. The code G51.39 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.

The ICD-10-CM code G51.39 might also be used to specify conditions or terms like clonic facial spasm, clonic hemifacial spasm, facial spasm or hemifacial spasm.

Unspecified diagnosis codes like G51.39 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Replacement Code

G5139 replaces the following previously assigned ICD-10 code(s):

Information for Patients


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.

Certain diseases also lead to facial disorders. For example, nerve diseases like trigeminal neuralgia or Bell's palsy sometimes cause facial pain, spasms and trouble with eye or facial movement. Birth defects can also affect the face. They can cause underdeveloped or unusually prominent facial features or a lack of facial expression. Cleft lip and palate are a common facial birth defect.


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Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019