ICD-10-CM > G00-G99 > G40-G47 > G44 > G44.2 > G44.22 G44.22 Chronic tension-type headache Non-Billable/Non-Specific Codes G44.221Chronic tension-type headache, intractableG44.229Chronic tension-type headache, not intractable
ICD-10 Fast ICD-10 Fast