G44.1 Vascular headache, not elsewhere classified

Billable/Specific

Type 2 Excludes

cluster headache (G44.0)
complicated headache syndromes (G44.5-)
drug-induced headache (G44.4-)
migraine (G43.-)
other specified headache syndromes (G44.8-)
post-traumatic headache (G44.3-)
tension-type headache (G44.2-)