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

ICD-10-CM 2027 diagnosis code · Episodic and paroxysmal disorders

Billable code

ICD-10-CM code G43.821

Code: G43.821 (claims format: G43821)
Description: Menstrual migraine, not intractable, with status migrainosus
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 6. Diseases of the nervous system (G00-G99)
Block: G40-G47 Episodic and paroxysmal disorders
Parent codes: G43 › G43.8 › G43.82

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

G43 – Migraine

Excludes1 (not coded here):

lower half migraine (G44.00)

Excludes2 (not included here):

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)

Notes:

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

G43.82 – Menstrual migraine, not intractable

Applicable to:

Menstrual headache, not intractable
Menstrual migraine, without refractory migraine
Menstrually related migraine, not intractable
Pre-menstrual headache, not intractable
Pre-menstrual migraine, not intractable
Pure menstrual migraine, not intractable

Code also:

associated premenstrual tension syndrome (N94.3)

Index terms for G43.821

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in G43.82

G43.829 – Menstrual migraine, not intractable, without status migrainosusBillable

Frequently asked questions

What is ICD-10 code G43.821?

G43.821 is the ICD-10-CM code for menstrual migraine, not intractable, with status migrainosus, in the block G40-G47 (Episodic and paroxysmal disorders).

Is G43.821 a billable code?

Yes. G43.821 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does G43.821 belong to?

It belongs to category G43 – Migraine.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.