G44.8 Other specified headache syndromesNon-billable header with 7 child codes.
G44.81 Hypnic headacheG44.82 Headache associated with sexual activityG44.83 Primary cough headacheG44.84 Primary exertional headacheG44.85 Primary stabbing headacheG44.86 Cervicogenic headacheG44.89 Other headache syndromeG44.1 Vascular headache, not elsewhere classified ("other specified headache syndromes (G44.8-)")G43 Migraine ("headache syndromes (G44.-)")G89 Pain, not elsewhere classified ("headache syndromes (G44.-)")R51 Headache ("migraine and other headache syndromes (G43-G44)")G44.5 Complicated headache syndromesG44.51 Hemicrania continuaG44.52 New daily persistent headache (NDPH)G44.53 Primary thunderclap headacheG44.59 Other complicated headache syndromeG44.8 Other specified headache syndromes (this code)G44.81 Hypnic headacheG44.82 Headache associated with sexual activityG44.83 Primary cough headacheG44.84 Primary exertional headacheG44.85 Primary stabbing headache