G44.89 Other headache syndrome

Billable ICD-10-CM code, FY2026.

Applies from G44 Other headache syndromes

Excludes1 (never code together)

• headache NOS (R51.9)

Excludes2 (not included here)

• atypical facial pain (G50.1)
• headache due to lumbar puncture (G97.1)
• migraines (G43.-)
• trigeminal neuralgia (G50.0)

Applies from G44.8 Other specified headache syndromes

Excludes2 (not included here)

• headache with orthostatic or positional component, not elsewhere classified (R51.0)

MS-DRG index

Defines the logic of DRG(s) 102-103 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 339.89 Other headache syndromes

Code annotations containing back-references to G44.89

Back-references to G44.8

• Type 2 Excludes: G44.1 Vascular headache, not elsewhere classified ("other specified headache syndromes (G44.8-)")

Back-references to G44

• Type 2 Excludes: G43 Migraine ("headache syndromes (G44.-)")
• Type 2 Excludes: G89 Pain, not elsewhere classified ("headache syndromes (G44.-)")
• Type 2 Excludes: R51 Headache ("migraine and other headache syndromes (G43-G44)")

Diagnosis Index entries for G44.89

• Headache › allergic NEC
• Headache › specified syndrome NEC
• Neuralgia, neuralgic (acute) › Sluder's
• Sluder's neuralgia (syndrome)
• Syndrome › headache NEC
• Syndrome › Sluder's

Nearby codes

• G44.82 Headache associated with sexual activity
• G44.83 Primary cough headache
• G44.84 Primary exertional headache
• G44.85 Primary stabbing headache
• G44.86 Cervicogenic headache
• G44.89 Other headache syndrome (this code)