ICD-10-CM 2027
ICD-10 code for intractable sunct
Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractable
From the official ICD-10-CM alphabetic index entry “SUNCT (short lasting unilateral neuralgiform headache with conjunctival injection and tearing) › intractable”. Page updated September 29, 2026.
About coding intractable sunct
The ICD-10-CM code for intractable sunct is G44.051 (Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractable).
Within G44.05 (short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT)), G44.051 is specifically for short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractable. Related codes cover not intractable (G44.059).
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.
Common questions about intractable sunct ICD-10 codes
What is the ICD-10 code for intractable sunct?
- G44.051 — Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractable.
Is G44.051 billable?
- Yes. G44.051 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G44.051 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G44.051 as a principal diagnosis.
Is G44.051 a CC or MCC?
- No. G44.051 is neither a CC nor an MCC under MS-DRG v44.0.