AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2018 Issue 4; New/Revised ICD-10-CM Codes
Clonic Hemifacial Spasm
Codes were created to allow the reporting of clonic hemifacial spasm laterality: G51.31 Clonic hemifacial spasm, right G51.32 Clonic hemifacial spasm, left G51.33 Clonic hemifacial spasm, bilateral and G51.39 Clonic hemifacial spasm, unspecified Hemifacial spasm is a neuromuscular condition that causes brief, involuntary, irregular clonic or tonic movement of muscles that are innervated by the seventh cranial nerve. The condition usually begins with a brief twitching of the eyelid muscle on one side of the face. The twitch may pull the eyelid down to completely shut the eye. As it progresses, the condition may ultimately...
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Article Overview
This article explains a diagnosis topic in neurology and coding guidance tied to laterality-based reporting. It is useful for coders, clinicians, and reimbursement staff who need to understand how the condition is discussed and how a related procedure example is framed in the context of code assignment. The article also references common clinical causes and treatment categories associated with the condition.
Why This Topic Matters
Laterality and procedure selection can affect accurate medical record reporting, claims processing, and code lookup for facial nerve-related conditions.
Article Sections
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Laterality-based diagnosis codes
Introduces the diagnosis topic and the set of laterality-specific reporting options referenced in the article.
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Clinical overview and causes
Summarizes the condition, its general clinical presentation, and broad associated causes and treatment categories.
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Clinical example and code assignment
Presents a sample scenario involving the condition and a related procedure, followed by the code assignment discussion.
What You Will Learn
- How the article frames laterality in reporting this diagnosis topic
- What general clinical features and associated causes are discussed
- How the article presents a sample diagnosis and procedure coding scenario
- What broad treatment categories are mentioned in relation to the condition
Who Should Read This
- Medical coders
- Coding auditors
- Clinical documentation staff
- Revenue cycle professionals
- Neurology practices
Codes Discussed
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