G44.22 Chronic tension-type headacheNon-billable header with 2 child codes.
G44.221 Chronic tension-type headache, intractableG44.229 Chronic tension-type headache, not intractableF54 Psychological and behavioral factors associated with disorders or diseases classified elsewhere ("tension-type headache (G44.2)")G44.1 Vascular headache, not elsewhere classified ("tension-type headache (G44.2-)")G43 Migraine ("headache syndromes (G44.-)")G89 Pain, not elsewhere classified ("headache syndromes (G44.-)")R51 Headache ("migraine and other headache syndromes (G43-G44)")G44.201 Tension-type headache, unspecified, intractableG44.209 Tension-type headache, unspecified, not intractableG44.21 Episodic tension-type headacheG44.211 Episodic tension-type headache, intractableG44.219 Episodic tension-type headache, not intractableG44.22 Chronic tension-type headache (this code)G44.221 Chronic tension-type headache, intractableG44.229 Chronic tension-type headache, not intractableG44.3 Post-traumatic headacheG44.30 Post-traumatic headache, unspecifiedG44.301 Post-traumatic headache, unspecified, intractable