ICD-10-CM › G00-G99 › G40-G47 › G44.00 Cluster headache syndrome, unspecified › G44.009
Cluster headache syndrome, unspecified, not intractable
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2007 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.
- FY2007 Added to the draft code set draft Cluster headache syndrome, unspecified, not intractable
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)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Pain > head
- Neuromyalgia
- Musculoneuralgia
- Pain > nerve NEC
- Perineuritis NEC
- Pain > neuromuscular
- Cephalgia, cephalalgia
- Headache > cluster
- Headache > histamine
- Syndrome > cluster headache
- Neuralgia, neuralgic > ciliary
- Neuralgia, neuralgic > migrainous
- Cephalgia, cephalalgia > histamine
- Headache > cluster > not intractable
- Headache > histamine > not intractable
- Syndrome > cluster headache > not intractable
- Neuralgia, neuralgic > ciliary > not intractable
- Neuralgia, neuralgic > migrainous > not intractable
- Cephalgia, cephalalgia > histamine > not intractable
Codes in the same group
| Code | Description | Status |
|---|---|---|
| G44.001 | Cluster headache syndrome, unspecified, intractable | Valid |