Is G43.E1 a billable ICD-10-CM code?

No. G43.E1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does G43.E1 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.E1?

G43.E1 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above G43.E1 (G43.E, G43) and apply to it just the same.

G43.E1

G43.E1 — Chronic migraine with aura, intractable

Non-billable headerICD-10-CM

G43.E1 is a non-billable header ICD-10-CM code for chronic migraine with aura, intractable. It cannot be billed on its own: choose one of the more specific child codes below.

Inclusion terms

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

Chronic migraine with aura, with refractory migraine

Excludes1 inherited from the categories above G43.E1

These are not written on G43.E1, but they bind it: a note on a category applies to every code beneath it. Billing G43.E1 with anything listed here is a denial.

Written on G43.E — Chronic migraine with aura

migraine with aura (G43.1-)

Written on G43 — Migraine

lower half migraine (G44.00)

Excludes2 inherited from the categories above G43.E1

Also inherited, and the opposite of Excludes1: these conditions are not part of G43.E1, but a patient can have both, so you may code both.

Written on G43 — Migraine

headache NOS (R51.9)
headache syndromes (G44.-)

Risk adjustment

G43.E1 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 history

G43.E1 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead G43.E1

2 child codes. Green means billable.

Related codes at this level

Codes that share G43.E. If G43.E1 is not quite right, the correct code is usually one of these.

G43.E0Chronic migraine with aura, not intractable

Questions about G43.E1

Is G43.E1 a billable ICD-10-CM code?: No. G43.E1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does G43.E1 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.E1?: G43.E1 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above G43.E1 (G43.E, G43) and apply to it just the same.