2027 ICD-10-CM Diagnosis Code G43Migraine

ICD-10-CM Codes›G00–G99›G40-G47›G43

ICD-10-CM G43
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

G43 is a non-billable ICD-10-CM category code for migraine, so it cannot be submitted on claims. Use a more specific code from this category instead, such as G43.001, G43.009, G43.011, and G43.019.

Code Identity

ICD-10-CM Code
G43
Billable Status
No — Non-Billable Category
Code Describes
Migraine
Short Description
Migraine
Same as the full description in the CMS dataset.
Chapter
G40-G47
Episodic and paroxysmal disorders

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG40-G47Episodic and paroxysmal disorders
CategoryG43Migraine
This CodeG43Migraine

Specific Coding for MigraineOverview

Non-specific codes like G43 require more characters. Use one of these billable codes instead:

  • G43.0 for Migraine without aura

  • G43.00 for Migraine without aura, not intractable

  • G43.01 for Migraine without aura, intractable

  • G43.1 for Migraine with aura

  • G43.10 for Migraine with aura, not intractable

  • G43.11 for Migraine with aura, intractable

  • G43.4 for Hemiplegic migraine

  • G43.40 for Hemiplegic migraine, not intractable

  • G43.41 for Hemiplegic migraine, intractable

  • G43.5 for Persistent migraine aura without cerebral infarction

  • G43.50 for Persistent migraine aura without cerebral infarction, not intractable

  • G43.51 for Persistent migraine aura without cerebral infarction, intractable

  • G43.6 for Persistent migraine aura with cerebral infarction

  • G43.60 for Persistent migraine aura with cerebral infarction, not intractable

  • G43.61 for Persistent migraine aura with cerebral infarction, intractable

  • G43.7 for Chronic migraine without aura

  • G43.70 for Chronic migraine without aura, not intractable

  • G43.71 for Chronic migraine without aura, intractable

  • G43.8 for Other migraine

  • G43.80 for Other migraine, not intractable

  • G43.81 for Other migraine, intractable

  • G43.82 for Menstrual migraine, not intractable

  • G43.83 for Menstrual migraine, intractable

  • G43.9 for Migraine, unspecified

  • G43.90 for Migraine, unspecified, not intractable

  • G43.91 for Migraine, unspecified, intractable

  • G43.A for Cyclical vomiting

  • Use G43.A0 for Cyclical vomiting, in migraine, not intractable

  • Use G43.A1 for Cyclical vomiting, in migraine, intractable

  • G43.B for Ophthalmoplegic migraine

  • Use G43.B0 for Ophthalmoplegic migraine, not intractable

  • Use G43.B1 for Ophthalmoplegic migraine, intractable

  • G43.C for Periodic headache syndromes in child or adult

  • Use G43.C0 for Periodic headache syndromes in child or adult, not intractable

  • Use G43.C1 for Periodic headache syndromes in child or adult, intractable

  • G43.D for Abdominal migraine

  • Use G43.D0 for Abdominal migraine, not intractable

  • Use G43.D1 for Abdominal migraine, intractable

  • G43.E for Chronic migraine with aura

  • G43.E0 for Chronic migraine with aura, not intractable

  • G43.E1 for Chronic migraine with aura, intractable

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to G43: its own notes plus those printed at Chapter 6. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On G43 itself
From Chapter 6 (G00-G99) Diseases of the nervous system applies to 700 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

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

Notes

General instructions on how these codes are used.

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

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name G43, its category, or a range that includes it.

Excludes2 4

These codes carry an Excludes2 note naming G43: its condition is not part of those codes, and both may be reported when the patient has both.

  • G44 Other headache syndromes
    migraines (G43.-)
  • G44.1 Vascular headache, not elsewhere classified
    migraine (G43.-)
  • G89 Pain, not elsewhere classified
    migraines (G43.-)
  • R51 Headache
    migraine and other headache syndromes (G43-G44)

Clinical InformationClinical

  • Migraine Disorders

    a class of disabling primary headache disorders, characterized by recurrent unilateral pulsatile headaches. the two major subtypes are common migraine (without aura) and classic migraine (with aura or neurological symptoms). (international classification of headache disorders, 2nd ed. cephalalgia 2004: suppl 1)

Patient EducationClinical

Migraine

Migraines are a recurring type of headache. They cause moderate to severe pain that is throbbing or pulsing. The pain is often on one side of your head. You may also have other symptoms, such as nausea and weakness. You may be sensitive to light and sound.

The full article covers:

  • What are migraines?
  • What causes migraines?
  • Who is at risk for migraines?
  • What are the symptoms of migraines?
  • How are migraines diagnosed?
  • How are migraines treated?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About G43Overview

What is the ICD-10 code for migraine?

G43 is the ICD-10-CM category for migraine, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is G43 (Migraine) a billable code?

No. This is a category header that groups the codes for migraine, and headers cannot be submitted on claims. Claims for migraine need a more specific code from this category, such as G43.001, G43.009, and G43.011.

Can G43 be reported with G44.00?

Not as a rule. The Excludes1 note on G43 lists "lower half migraine (G44.00)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

Does G43 need an additional code?

When the condition applies, yes. The Use Additional Code note reads: code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5). The additional code is reported after G43.