G43.01 – Migraine without aura, intractable

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

Non-billable header

ICD-10-CM code G43.01
Code
G43.01 (claims format: G4301)
Description
Migraine without aura, intractable
Billable
No – use a more specific code below
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 › G43.0

Billable codes under G43.01

G43.01 is a header code and cannot be used on claims. Choose the most specific code:

Notes for G43.01

Applicable to:
  • Migraine without aura with refractory migraine

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):
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

G43.0 – Migraine without aura

Applicable to:
  • Common migraine
Excludes1 (not coded here):
  • chronic migraine without aura (G43.7-)

Related codes in G43.0

Frequently asked questions

What is ICD-10 code G43.01?

G43.01 is the ICD-10-CM code for migraine without aura, intractable, in the block G40-G47 (Episodic and paroxysmal disorders).

Is G43.01 a billable code?

No. G43.01 is a header code with more specific child codes; report one of the billable codes listed above.

What category does G43.01 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.