G44 Other headache syndromes

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Other headache syndromes is G44 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
G40-G47: Episodic and paroxysmal disorders (G40-G47)
Category G44
60 codes (40 billable)
FY2026 Status
Stable since FY2024
Excludes1
Not coded here. These conditions should NOT be coded together with G44.
  • headache NOS (R51.9)
Excludes2
Not included here. These conditions are coded elsewhere but may be coded together if applicable.
  • atypical facial pain (G50.1)
  • headache due to lumbar puncture (G97.1)
  • migraines (G43.-)
  • trigeminal neuralgia (G50.0)

Official Coding Guidelines

Dominant/nondominant side (TOC entry)

a. Dominant/nondominant side ................................................................................................. 45

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.6.a
Pain - Category G89 (TOC entry)

b. Pain - Category G89.............................................................................................................. 45

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.6.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

More Specific Codes

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

Related Codes in G44

G44.0 Cluster headaches and other trigeminal autonomic cephalgias (TAC) G44.00 Cluster headache syndrome, unspecified G44.001 Cluster headache syndrome, unspecified, intractable G44.009 Cluster headache syndrome, unspecified, not intractable G44.01 Episodic cluster headache G44.011 Episodic cluster headache, intractable G44.019 Episodic cluster headache, not intractable G44.02 Chronic cluster headache G44.021 Chronic cluster headache, intractable G44.029 Chronic cluster headache, not intractable G44.03 Episodic paroxysmal hemicrania G44.031 Episodic paroxysmal hemicrania, intractable G44.039 Episodic paroxysmal hemicrania, not intractable G44.04 Chronic paroxysmal hemicrania G44.041 Chronic paroxysmal hemicrania, intractable G44.049 Chronic paroxysmal hemicrania, not intractable G44.05 Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT) G44.051 Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractable G44.059 Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable G44.09 Other trigeminal autonomic cephalgias (TAC)
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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