G44
G44 — Other headache syndromes
Non-billable headerICD-10-CM
G44 is a non-billable header ICD-10-CM code for other headache syndromes. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- headache NOS (R51.9)
Excludes2 — not included here, but may coexist
The excluded condition is not part of this code, but a patient can have both. You may code both.
Other codes that can never be billed with G44
These codes carry an Excludes1 note pointing at G44. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G44 alone.
- G43Migraine
Risk adjustment
G44 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.
Code to one of these instead G44
7 child codes. Green means billable.
Questions about G44
- Is G44 a billable ICD-10-CM code?
- No. G44 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does G44 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Episodic and paroxysmal disorders (G40-G47).
- What cannot be coded together with G44?
- G44 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.