Complicated headache syndromes

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 4 more specific codes instead:

G44.51 Hemicrania continua
G44.52 New daily persistent headache (NDPH)
G44.53 Primary thunderclap headache
G44.59 Other complicated headache syndrome

What has happened to this code

Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

FY2012 Added to the draft code set draft Complicated headache syndromes

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from G44 Other headache syndromes

Excludes1 - never coded here

headache NOS (R51.9)

Excludes2 - not included here

atypical facial pain (G50.1)
headache due to lumbar puncture (G97.1)
migraines (G43.-)
trigeminal neuralgia (G50.0)

Codes in the same group

Code	Description	Status
G44.0	Cluster headaches and other trigeminal autonomic cephalgias (TAC)	Not billable
G44.1	Vascular headache, not elsewhere classified	Valid
G44.2	Tension-type headache	Not billable
G44.3	Post-traumatic headache	Not billable
G44.4	Drug-induced headache, not elsewhere classified	Not billable
G44.8	Other specified headache syndromes	Not billable