G51.3
⚠ Non-billable (Header)Clonic hemifacial spasm
Diseases of the nervous system (G00-G99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
Child Codes (4)
Clinical Description
ICD-10-CM code G51.3 represents clonic hemifacial spasm. This code falls under the Diseases of the nervous system (G00-G99) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.
This is a 5-character code at the 4th level of specificity. There are 4 more specific child codes under G51.3.
Frequently Asked Questions
What is ICD-10 code G51.3?
ICD-10-CM code G51.3 is "Clonic hemifacial spasm". It belongs to the category: Diseases of the nervous system (G00-G99).
Is G51.3 a billable ICD-10 code?
No, G51.3 is a non-billable header code. A more specific child code must be used for billing.
Related Codes in G51
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)