---
title: "ICD-10-CM G43.821: Menstrual migraine, not intractable… | BillingBrief"
description: "ICD-10-CM code G43.821: Menstrual migraine, not intractable, with status migrainosus. Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/icd10/g43.821/"
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---

# G43.821 Menstrual migraine, not intractable, with status migrainosus

ICD-10-CM · [CMS code reference](#source)

**Official ICD-10-CM description:** Menstrual migraine, not intractable, with status migrainosus

## Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

### Note

-   the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled

### Excludes1

Not coded together with this code. The exception is when the two conditions are unrelated to each other.

-   lower half migraine (G44.00)

### Excludes2

Not part of this code, but both can be coded when both are documented.

-   headache NOS ([R51.9](https://billingbrief.com/icd10/r51.9/))
-   headache syndromes (G44.-)

### Use additional code

Add a second code for the following, when documented.

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

### Code also

A second code may be needed. Sequencing depends on the encounter.

-   associated premenstrual tension syndrome (N94.3)

## Related codes

-   [`G43.801` Other migraine, not intractable, with status migrainosus ICD-10-CM](https://billingbrief.com/icd10/g43.801/)
-   [`G43.809` Other migraine, not intractable, without status migrainosus ICD-10-CM](https://billingbrief.com/icd10/g43.809/)
-   [`G43.811` Other migraine, intractable, with status migrainosus ICD-10-CM](https://billingbrief.com/icd10/g43.811/)
-   [`G43.819` Other migraine, intractable, without status migrainosus ICD-10-CM](https://billingbrief.com/icd10/g43.819/)
-   [`G43.829` Menstrual migraine, not intractable, without status migrainosus ICD-10-CM](https://billingbrief.com/icd10/g43.829/)
-   [`G43.831` Menstrual migraine, intractable, with status migrainosus ICD-10-CM](https://billingbrief.com/icd10/g43.831/)
-   [`G43.839` Menstrual migraine, intractable, without status migrainosus ICD-10-CM](https://billingbrief.com/icd10/g43.839/)
-   [`G43.901` Migraine, unspecified, not intractable, with status migrainosus ICD-10-CM](https://billingbrief.com/icd10/g43.901/)

## Common questions

### Is G43.821 a billable code?

Yes. G43.821 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/icd-10-codes).
ICD-10-CM FY2027 (effective October 1, 2026).

Code set

ICD-10-CM

Category

G43 Migraine

Chapter

Diseases of the nervous system

Billable

Yes

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).