FY2026 · AprilSelected edition
Effective from
- Code-level rules changed
Migraine
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)
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 · 2015-10-01
Latest recorded change · FY2026 · April
Effective from
Migraine
Category — select a more specific code
CDC/NCHS · FY2026 · April| All editions | Effective from | Code history |
|---|---|---|
| FY2016 | 2015-10-01 | First observed |
| FY2017 | 2016-10-01 | No tabular change |
| FY2018 | 2017-10-01 | No tabular change |
| FY2019 | 2018-10-01 | No tabular change |
| FY2020 | 2019-10-01 | No tabular change |
| FY2020 · April | 2020-04-01 | No tabular change |
| FY2021 | 2020-10-01 | Code-level rules changed |
| FY2021 · 01-01 | 2021-01-01 | No tabular change |
| FY2022 | 2021-10-01 | No tabular change |
| FY2022 · 04-01 | 2022-04-01 | No tabular change |
| FY2023 | 2022-10-01 | No tabular change |
| FY2023 · 04-01 | 2023-04-01 | No tabular change |
| FY2024 | 2023-10-01 | No tabular change |
| 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 | Code-level rules changed |
| FY2027 | 2026-10-01 | No tabular change |
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
G43.0Migraine without auraCategory · further specificity requiredG43.1Migraine with auraCategory · further specificity requiredG43.4Hemiplegic migraineCategory · further specificity requiredG43.5Persistent migraine aura without cerebral infarctionCategory · further specificity requiredG43.6Persistent migraine aura with cerebral infarctionCategory · further specificity requiredG43.7Chronic migraine without auraCategory · further specificity requiredG43.8Other migraineCategory · further specificity requiredG43.9Migraine, unspecifiedCategory · further specificity requiredG43.ACyclical vomitingCategory · further specificity requiredG43.BOphthalmoplegic migraineCategory · further specificity requiredG43.CPeriodic headache syndromes in child or adultCategory · further specificity requiredG43.DAbdominal migraineCategory · further specificity requiredG43.EChronic migraine with auraCategory · further specificity requiredOfficial titles and instructions are preserved in their source language. Official sources ↗