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Genetic analysis of hemoglobin variants (qualitative)

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

This test checks for different types of hemoglobin in your blood, which can help identify inherited blood disorders like sickle cell disease or thalassemia.

Quick summary

["This test helps diagnose genetic blood conditions that may affect how your red blood cells function."]

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

Key facts at a glance

LOINC
61157-4
Short code
HBV M204V Islt Ql Genotyp
Synonyms
HBV M204V Islt Ql Genotyp
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
genotyping
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What Does This Test Measure?

The test analyzes the structure and quantity of hemoglobin variants in your blood. Hemoglobin is the protein in red blood cells that carries oxygen. Certain genetic mutations can alter hemoglobin’s structure, leading to conditions that may cause anemia, pain crises, or other health issues.

Why Might You Need This Test?

Your doctor may recommend this test if you have a family history of hemoglobin disorders, symptoms like fatigue, frequent infections, or unusual pain, or if you’re pregnant and at higher risk for complications.

What to Expect Before the Test

You’ll typically have a simple blood draw from a vein in your arm. No special preparation is needed, but inform your doctor about any medications or conditions that could affect results.

What to Expect After the Test

Results are usually available within days. If abnormalities are found, your doctor will discuss next steps, which may include further genetic testing or monitoring.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Hemoglobin variant screening

Frequently asked questions

Will this test show if I have sickle cell disease?
Yes, this test can detect certain hemoglobin variants linked to sickle cell disease or other hemoglobinopathies, but it may not identify all cases. Additional genetic testing might be needed for confirmation.
How long does it take to get results?
Results are typically available within 3–5 business days, depending on lab processing times.
Can I eat or drink before this test?
No special diet is required, but avoid caffeine or heavy meals 1 hour before your blood draw to ensure accurate results.
  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