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G6PD Gene Mutation Test (Blood)

Published: August 9, 2026Updated: August 16, 2026

This test checks for genetic variations in the G6PD gene, which may affect your ability to process certain medications or handle certain conditions like anemia or infections.

Quick summary

["This test helps identify genetic differences that could influence your health or treatment options."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
21681-2
Short code
G6PD gene Mut Tested Bld/T
Synonyms
G6PD gene Mut Tested Bld/T
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have a family history of G6PD deficiency, certain blood disorders, or if you’re considering medications that interact with G6PD, such as certain antibiotics or antimalarials. It may also be used for prenatal screening or before procedures that could trigger a G6PD-related reaction.

What to Expect Before the Test

You’ll typically have a small blood sample drawn from your arm. No special preparation is needed, but avoid eating or drinking for a few hours before the test if instructed by your provider.

What the Test Measures

The test analyzes your blood for specific mutations in the G6PD gene, which encodes an enzyme critical for red blood cell health. Variations in this gene can lead to conditions like G6PD deficiency, where red blood cells break down more easily.

Possible Results and Next Steps

If mutations are found, your provider will discuss potential implications, including how they may affect your health or treatment choices. Results may guide decisions about medications, lifestyle adjustments, or further testing.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

G6PD Mutation Screening

Frequently asked questions

What does a positive result mean?
A positive result indicates the presence of G6PD gene mutations. This may mean you have a higher risk of certain reactions to medications or conditions like G6PD deficiency, but it doesn’t always mean you’ll experience symptoms. Your provider will explain how this affects your care plan.
Will this test affect my ability to take certain medications?
Some medications may interact with G6PD mutations, increasing the risk of side effects like anemia or jaundice. Your provider will review your results and adjust medications or provide precautions if needed.
Can this test be done at home?
Currently, this test is typically performed in a clinical lab using a blood sample drawn by a healthcare professional. Home testing for gene mutations is not standard and would require approval from your provider.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy