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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

["Helps diagnose genetic blood conditions by identifying unusual hemoglobin forms."]

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

Key facts at a glance

LOINC
61170-7
Short code
HBV M250V Islt Ql Genotyp
Synonyms
HBV M250V 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 Is This Test Measuring?

This test looks at the structure and quantity of hemoglobin in your red blood cells. Hemoglobin is the protein that carries oxygen in your blood. Certain genetic mutations can cause hemoglobin to form abnormally, leading to conditions that affect how well your blood carries oxygen or cause red blood cell breakdown.

Why Might You Need This Test?

Your doctor may recommend this test if you have symptoms like fatigue, pale skin, frequent infections, or pain (common in sickle cell disease). It’s also used in newborn screening programs or if family history suggests a risk of hemoglobin disorders.

Sample Collection and Preparation

A small blood sample is taken from your arm using a needle. The blood is then processed to separate the red blood cells, where hemoglobin variants are analyzed. No special preparation is needed, but avoid strenuous activity 24 hours before the test.

What to Expect After the Test

Results may take several days to weeks, depending on the lab and testing method. You’ll receive a report detailing the types and amounts of hemoglobin found. Follow-up may include additional tests or genetic counseling if abnormalities are detected.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Hemoglobin variant screening

Frequently asked questions

How long does it take to get results from this test?
Results typically take 7–14 days, but some labs may provide preliminary screening results sooner. Your doctor will discuss the findings with you during a follow-up visit.
Can I eat or drink before this test?
No special diet is required, but avoid caffeine or heavy meals 24 hours before your blood draw to ensure accurate results.
Is this test painful?
The blood draw itself may cause mild discomfort, but most people tolerate it well. A small bandage is applied afterward to help with healing.
  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