ICD-10 Code G43.41 – Hemiplegic migraine, intractable (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G43.41 – Hemiplegic migraine, intractable
What it is
G43.41 identifies hemiplegic migraine that is not responding well to treatment. This migraine type includes temporary weakness on one side of the body along with migraine features.
Clinical signs
Typical findings include unilateral motor weakness plus migraine aura symptoms such as visual or sensory changes. Clinical features vary; refer to documentation.
When to use this code
Use G43.41 when the provider documents hemiplegic migraine and states it is intractable, refractory, or poorly controlled. The record should support both the hemiplegic migraine diagnosis and the intractable status. If documentation is incomplete, check documentation before assigning the code.
Do not use for
Do not use this code for ordinary migraine without motor weakness, or when the provider does not document intractability. Check documentation if the episode is described as resolved or unspecified.
Coding tip
Code the condition only when the chart clearly links hemiplegic migraine with intractability.