ICD-10-CM 2027
ICD-10 code for SUNCT
Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable
From the official ICD-10-CM alphabetic index entry “SUNCT (short lasting unilateral neuralgiform headache with conjunctival injection and tearing)”. Page updated September 29, 2026.
About coding SUNCT
The ICD-10-CM code for SUNCT is G44.059 (Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on G44.059.
Within G44.05 (short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT)), G44.059 is specifically for short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable. Related codes cover intractable (G44.051).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 102 (Headaches with MCC, relative weight 1.1201) and DRG 103 (Headaches without MCC, relative weight 0.822), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific SUNCT codes (official index)
Common questions about SUNCT ICD-10 codes
What is the ICD-10 code for SUNCT?
- G44.059 — Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable. More specific codes apply when the documentation supports them: G44.051, G44.059.
What is the ICD-10 code for intractable sunct?
- G44.051 — Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractable.
Is G44.059 billable?
- Yes. G44.059 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G44.059 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G44.059 as a principal diagnosis.
Is G44.059 a CC or MCC?
- No. G44.059 is neither a CC nor an MCC under MS-DRG v44.0.