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ICD-10-CM category G44: Other headache syndromes

Category G44 is a heading in chapter 6 (Diseases of the nervous system (G00-G99)), section Episodic and paroxysmal disorders (G40-G47). It is not billable; report one of the 40 complete codes below.

Notes that apply to every G44 code

Excludes1 (never coded together)
  • headache NOS (R51.9)
Excludes2 (not part of this condition, may be coded together)
  • atypical facial pain (G50.1)
  • headache due to lumbar puncture (G97.1)
  • migraines (G43.-)
  • trigeminal neuralgia (G50.0)

Billable codes in G44

Billable FY2027 ICD-10-CM codes in category G44
CodeDescription
G44.001Cluster headache syndrome, unspecified, intractable
G44.009Cluster headache syndrome, unspecified, not intractable
G44.011Episodic cluster headache, intractable
G44.019Episodic cluster headache, not intractable
G44.021Chronic cluster headache, intractable
G44.029Chronic cluster headache, not intractable
G44.031Episodic paroxysmal hemicrania, intractable
G44.039Episodic paroxysmal hemicrania, not intractable
G44.041Chronic paroxysmal hemicrania, intractable
G44.049Chronic paroxysmal hemicrania, not intractable
G44.051Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractable
G44.059Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable
G44.091Other trigeminal autonomic cephalgias (TAC), intractable
G44.099Other trigeminal autonomic cephalgias (TAC), not intractable
G44.1Vascular headache, not elsewhere classified
G44.201Tension-type headache, unspecified, intractable
G44.209Tension-type headache, unspecified, not intractable
G44.211Episodic tension-type headache, intractable
G44.219Episodic tension-type headache, not intractable
G44.221Chronic tension-type headache, intractable
G44.229Chronic tension-type headache, not intractable
G44.301Post-traumatic headache, unspecified, intractable
G44.309Post-traumatic headache, unspecified, not intractable
G44.311Acute post-traumatic headache, intractable
G44.319Acute post-traumatic headache, not intractable
G44.321Chronic post-traumatic headache, intractable
G44.329Chronic post-traumatic headache, not intractable
G44.40Drug-induced headache, not elsewhere classified, not intractable
G44.41Drug-induced headache, not elsewhere classified, intractable
G44.51Hemicrania continua
G44.52New daily persistent headache (NDPH)
G44.53Primary thunderclap headache
G44.59Other complicated headache syndrome
G44.81Hypnic headache
G44.82Headache associated with sexual activity
G44.83Primary cough headache
G44.84Primary exertional headache
G44.85Primary stabbing headache
G44.86Cervicogenic headache
G44.89Other headache syndrome

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.

Codes from the FY2027 ICD-10-CM files (all chapters). Report the code that matches the documentation and the Official Guidelines; this list is not coding advice.