G44 - Other headache syndromes
G44.4 - Drug-induced headache, not elsewhere classified
InclusionTerm:
-Medication overuse headache
Use Additional Code:
-code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
G44.40 - Drug-induced headache, not elsewhere classified, not intractable
G44.41 - Drug-induced headache, not elsewhere classified, intractable