G44.51 Hemicrania continua
ICD-10-CM · CMS code reference
Official ICD-10-CM description: Hemicrania continua
Coding notes
From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.
Excludes1
Not coded together with this code. The exception is when the two conditions are unrelated to each other.
- headache NOS (R51.9)
Excludes2
Not part of this code, but both can be coded when both are documented.
- atypical facial pain (G50.1)
- headache due to lumbar puncture (G97.1)
- migraines (G43.-)
- trigeminal neuralgia (G50.0)
Related codes
G44.321Chronic post-traumatic headache, intractable ICD-10-CMG44.329Chronic post-traumatic headache, not intractable ICD-10-CMG44.40Drug-induced headache, not elsewhere classified, not intractable ICD-10-CMG44.41Drug-induced headache, not elsewhere classified, intractable ICD-10-CMG44.52New daily persistent headache (NDPH) ICD-10-CMG44.53Primary thunderclap headache ICD-10-CMG44.59Other complicated headache syndrome ICD-10-CMG44.81Hypnic headache ICD-10-CM
Common questions
Is G44.51 a billable code?
Yes. G44.51 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.