G44.059 ICD-10-CM Code: Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable
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FY 2026 Apr update / Diseases of the nervous system (G00-G99) / Episodic and paroxysmal disorders (G40-G47)
G44.059
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceShort lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable
A rare headache condition with very brief episodes of severe, stabbing pain on one side of the head with eye redness and tearing that responds adequately to treatment.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
Code Trumping
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Code Book Path
Inclusion Terms
Official- Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT) NOS
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for G44.059 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for G44.059 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for G44.059 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for G44.059 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for G44.059 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for G44.059 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is G44.059 an HCC code?
No. G44.059 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
G44.059 is the ICD-10-CM diagnosis code for short lasting unilateral neuralgiform headache with conjunctival injection and tearing (sunct), not intractable. A rare headache condition with very brief episodes of severe, stabbing pain on one side of the head with eye redness and tearing that responds adequately to treatment. G44.059 sits in the ICD-10-CM chapter for diseases of the nervous system (g00-g99), within the section covering episodic and paroxysmal disorders (g40-g47).
G44.059 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Verify the characteristic short duration of attacks (typically 15-120 seconds) is documented in clinical notes.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for G44.059 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Verify the characteristic short duration of attacks (typically 15-120 seconds) is documented in clinical notes
- •Document the specific treatments being used and their effectiveness in controlling attacks