G44.009 — Cluster headache syndrome, unspecified, not intractable
G44.009 is a billable, specific ICD-10-CM code for cluster headache syndrome, unspecified, not intractable. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Cluster headache syndrome NOS
Risk adjustment
G44.009 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
G44.009 is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56612Billing and Coding: CT of the Head
- A57204Billing and Coding: MRI and CT Scans of the Head and Neck
How G44.009 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to G44.009.
- Cephalgia, cephalalgia›histamine
- Headache›cluster
- Headache›histamine
- Neuralgia, neuralgic›ciliary
- Neuralgia, neuralgic›migrainous
- Syndrome›cluster headache
- Cephalgia, cephalalgia›histamine›not intractable
- Headache›cluster›not intractable
- Headache›histamine›not intractable
- Neuralgia, neuralgic›ciliary›not intractable
- Neuralgia, neuralgic›migrainous›not intractable
- Syndrome›cluster headache›not intractable
Related codes at this level
Codes that share G44.00. If G44.009 is not quite right, the correct code is usually one of these.
Questions about G44.009
- Is G44.009 a billable ICD-10-CM code?
- Yes. G44.009 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does G44.009 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Episodic and paroxysmal disorders (G40-G47).