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ICD-10-CM · FY 2026 APRIL UPDATE

G44

Other headache syndromes

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
G44.0Cluster headaches and other trigeminal autonomic cephalgias (TAC)Category
G44.00Cluster headache syndrome, unspecifiedCategory
G44.001Cluster headache syndrome, unspecified, intractableBillable
G44.009Cluster headache syndrome, unspecified, not intractableBillable
G44.01Episodic cluster headacheCategory
G44.011Episodic cluster headache, intractableBillable
G44.019Episodic cluster headache, not intractableBillable
G44.02Chronic cluster headacheCategory
G44.021Chronic cluster headache, intractableBillable
G44.029Chronic cluster headache, not intractableBillable
G44.03Episodic paroxysmal hemicraniaCategory
G44.031Episodic paroxysmal hemicrania, intractableBillable
G44.039Episodic paroxysmal hemicrania, not intractableBillable
G44.04Chronic paroxysmal hemicraniaCategory
G44.041Chronic paroxysmal hemicrania, intractableBillable
G44.049Chronic paroxysmal hemicrania, not intractableBillable
G44.05Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT)Category
G44.051Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractableBillable
G44.059Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractableBillable
G44.09Other trigeminal autonomic cephalgias (TAC)Category
G44.091Other trigeminal autonomic cephalgias (TAC), intractableBillable
G44.099Other trigeminal autonomic cephalgias (TAC), not intractableBillable
G44.1Vascular headache, not elsewhere classifiedBillable
G44.2Tension-type headacheCategory
G44.20Tension-type headache, unspecifiedCategory
G44.201Tension-type headache, unspecified, intractableBillable
G44.209Tension-type headache, unspecified, not intractableBillable
G44.21Episodic tension-type headacheCategory
G44.211Episodic tension-type headache, intractableBillable
G44.219Episodic tension-type headache, not intractableBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.