FY2026 · April
Effective from
- Inherited rules changed
Chronic migraine with aura, intractable
Category — select a more specific code
CDC/NCHS · FY2026 · Aprilcode for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
lower half migraine (G44.00)
migraine with aura (G43.1-)
For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.
Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.
Official coding guidelines → · CMS ↗First observed · 2023-10-01
Latest recorded change · FY2026 · April
Effective from
Chronic migraine with aura, intractable
Category — select a more specific code
CDC/NCHS · FY2026 · April| All editions | Effective from | Code history |
|---|---|---|
| FY2024 | 2023-10-01 | Added |
| FY2024 · 04-01 | 2024-04-01 | No tabular change |
| FY2025 | 2024-10-01 | No tabular change |
| FY2025 · 04-01 | 2025-04-01 | No tabular change |
| FY2026 | 2025-10-01 | No tabular change |
| FY2026 · April | 2026-04-01 | Inherited rules changed |
| FY2027 | 2026-10-01 | No tabular change |
Chronic migraine with aura, with refractory migraine
lower half migraine (G44.00)
code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled
migraine with aura (G43.1-)
Other entries in the same category; these are not automatic substitutes.
| Code | Description | Category · further specificity required |
|---|---|---|
| G43.E0 | Chronic migraine with aura, not intractable | Category · further specificity required |
Official titles and instructions are preserved in their source language. Official sources ↗