ICD-10 Code G44.059 – Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G44.059 – Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable
What it is
This code identifies SUNCT, a rare primary headache disorder with brief, one-sided attacks. The “not intractable” label means the headache is not documented as difficult to control.
Clinical signs
Attacks are short, severe, and strictly unilateral, usually around the eye or temple. Conjunctival injection and tearing are typical; clinical features vary, so refer to documentation.
When to use this code
Use G44.059 when the record specifically documents SUNCT and does not describe it as intractable. Apply it for confirmed short-lasting unilateral neuralgiform headache with eye redness and tearing, when the provider links those findings to SUNCT.
If the note only says “headache” or does not clearly identify SUNCT, check documentation before coding. Use the provider’s exact terminology when available.
Do not use for
Do not use this code for other headache types, including migraine or cluster headache, unless SUNCT is explicitly documented. Do not use it when the condition is described as intractable instead.
Coding tip
Confirm both the SUNCT diagnosis and the “not intractable” wording in the chart before assigning G44.059.