G44.5 Complicated headache syndromes

Non-billable header with 4 child codes.

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)

Codes under G44.5

• G44.51 Hemicrania continua
• G44.52 New daily persistent headache (NDPH)
• G44.53 Primary thunderclap headache
• G44.59 Other complicated headache syndrome

Code annotations containing back-references to G44.5

Back-references to G44.5

• Type 2 Excludes: G44.1 Vascular headache, not elsewhere classified ("complicated headache syndromes (G44.5-)")

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)")

Nearby codes

• G44.321 Chronic post-traumatic headache, intractable
• G44.329 Chronic post-traumatic headache, not intractable
• G44.4 Drug-induced headache, not elsewhere classified
• G44.40 Drug-induced headache, not elsewhere classified, not intractable
• G44.41 Drug-induced headache, not elsewhere classified, intractable
• G44.5 Complicated headache syndromes (this code)
• G44.51 Hemicrania continua
• G44.52 New daily persistent headache (NDPH)
• G44.53 Primary thunderclap headache
• G44.59 Other complicated headache syndrome
• G44.8 Other specified headache syndromes