G44.021
G44.021: Chronic cluster headache, intractable
Billable / specific codeICD-10-CM
G44.021 is a billable, specific ICD-10-CM code for chronic cluster headache, intractable. It is valid for submission on a claim.
Check G44.021 with the rest of the claim: free scrubberExcludes1 inherited from the categories above G44.021
A category’s note binds every code beneath it.
Excludes2 inherited from the categories above G44.021
Not part of this code, but both may be coded when both are present.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
G44.021 is named in 3 Medicare coverage policies: 3 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A55530Billing and Coding: Peripheral Nerve Stimulation
- A56612Billing and Coding: CT of the Head
- A57204Billing and Coding: MRI and CT Scans of the Head and Neck
Alphabetic index entries that lead here
- Headache›cluster›chronic›intractable
Code history
Unchanged in every release from FY2024 to FY2027.