Is G44.02 a billable ICD-10-CM code?

No. G44.02 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does G44.02 sit in the tabular list?

Diseases of the nervous system (G00-G99), in the block Episodic and paroxysmal disorders (G40-G47).

G44.02

G44.02 — Chronic cluster headache

Non-billable headerICD-10-CM

G44.02 is a non-billable header ICD-10-CM code for chronic cluster headache. It cannot be billed on its own: choose one of the more specific child codes below.

Risk adjustment

G44.02 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 G44.02

2 child codes. Green means billable.

G44.021Chronic cluster headache, intractable
G44.029Chronic cluster headache, not intractable

Related codes at this level

Codes that share G44.0. If G44.02 is not quite right, the correct code is usually one of these.

G44.00Cluster headache syndrome, unspecified
G44.01Episodic cluster headache
G44.03Episodic paroxysmal hemicrania
G44.04Chronic paroxysmal hemicrania
G44.05Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT)
G44.09Other trigeminal autonomic cephalgias (TAC)

Questions about G44.02

Is G44.02 a billable ICD-10-CM code?: No. G44.02 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does G44.02 sit in the tabular list?: Diseases of the nervous system (G00-G99), in the block Episodic and paroxysmal disorders (G40-G47).