Is G43.1 a billable ICD-10-CM code?

No. G43.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does G43.1 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 G43.1?

G43.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

G43.1

G43.1 — Migraine with aura

Non-billable headerICD-10-CM

G43.1 is a non-billable header ICD-10-CM code for migraine with aura. 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.

chronic migraine with aura (G43.E-)
persistent migraine aura (G43.5-, G43.6-)

Code also

Both codes may be needed to describe the encounter fully. Sequencing depends on the reason for the visit.

any associated seizure (G40.-, R56.9)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Basilar migraine
Classical migraine
Migraine equivalents
Migraine preceded or accompanied by transient focal neurological phenomena
Migraine triggered seizures
Migraine with acute-onset aura
Migraine with aura without headache (migraine equivalents)
Migraine with prolonged aura
Migraine with typical aura
Retinal migraine

Other codes that can never be billed with G43.1

These codes carry an Excludes1 note pointing at G43.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G43.1 alone.

G43.EChronic migraine with aura

Risk adjustment

G43.1 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 G43.1

2 child codes. Green means billable.

Related codes at this level

Codes that share G43. If G43.1 is not quite right, the correct code is usually one of these.

Questions about G43.1

Is G43.1 a billable ICD-10-CM code?: No. G43.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does G43.1 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 G43.1?: G43.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.