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ICD-10-CM 2027 diagnosis code

G43.EChronic migraine with aura

Not billable — use a more specific code

G43.E is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.

Code last changed in FY2024 (effective October 1, 2023). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About G43.E

G43.E is the ICD-10-CM diagnosis code for chronic migraine with aura. It belongs to category G43 (migraine), block G40-G47 (episodic and paroxysmal disorders) and chapter 6 (diseases of the nervous system). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within G43 (migraine), G43.E is specifically for chronic migraine with aura. Related codes cover without aura (G43.0), with aura (G43.1), hemiplegic migraine (G43.4), persistent migraine aura without cerebral infarction (G43.5), persistent migraine aura with cerebral infarction (G43.6), chronic migraine without aura (G43.7), other migraine (G43.8), unspecified (G43.9) and 4 more.

To report this condition, pick the subcode that matches the documentation: G43.E0 (not intractable) and G43.E1 (intractable).

Don't report G43.E together with the conditions in its Excludes1 note: migraine with aura (G43.1-).

Use an additional code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5).

It was added in FY2024, effective October 1, 2023.

Specific codes under G43.E

Coding notes

Excludes1Not coded here — never report together with this code

Notes that apply from higher levels

Instructions written at a parent level also apply to G43.E.

› From G43 Migraine
Note
  • the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled
Excludes1
Excludes2
  • headache NOS (R51.9)
  • headache syndromes (G44.-)
Use additional code
  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Broader instructions also apply from Chapter 6: Diseases of the nervous system.

Codes whose notes reference G43.E

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2024 (effective 10/1/2023): Added
  • No changes since FY2024.

Common questions about G43.E

Is G43.E billable?

No. G43.E is a header code. Report one of its more specific subcodes instead.