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Hemoglobin Variants by Surface Antibody Screening (Serum/Plasma)

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

This test checks for different types of hemoglobin in your blood, which may indicate inherited blood disorders like sickle cell disease or other genetic conditions.

Quick summary

["Helps identify rare hemoglobin variants that could affect blood health or require further testing."]

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

Key facts at a glance

LOINC
42504-1
Short code
HBV surface Ab CSF Ql
Synonyms
HBV surface Ab CSF Ql
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Ref low
0
Ref high
5
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82378
SNOMED
394995008
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Matters

Hemoglobin is the protein in red blood cells that carries oxygen. Some people inherit unusual hemoglobin forms that can cause health problems, such as anemia, pain crises, or organ damage. This test screens for these variants early, allowing for early treatment or genetic counseling if needed.

What to Expect Before the Test

You’ll have a small needle inserted into your arm or hand to draw blood. The process takes about 5 minutes. No special preparation is needed, but tell your doctor if you’re on blood thinners or have a history of bleeding issues.

What the Results Mean

Results show the proportion of different hemoglobin types. Abnormal patterns may signal genetic conditions. Your doctor will discuss findings with you, including next steps like confirmatory testing or genetic counseling.

Common Conditions Linked to This Test

Variants like sickle hemoglobin (HbS) or thalassemia can cause chronic pain, frequent infections, or organ damage. Early detection helps manage symptoms and plan care.

Reference range

Non-smokers: <2.5 ng/mL; Smokers: <5.0 ng/mLN/A

Specimen: csf

No special preparation required. For PSA, avoid sexual activity for 24-48 hours before the test.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test is used primarily in newborn screening, genetic testing, or diagnosing inherited blood disorders. It helps doctors identify conditions that may require specialized care, such as blood transfusions, pain management, or lifestyle adjustments.

Short name

Hemoglobin Variant Screening

Frequently asked questions

What causes abnormal hemoglobin variants?
Abnormal hemoglobin variants often result from genetic mutations passed down through families. These mutations can alter how hemoglobin functions, sometimes leading to conditions like sickle cell disease or thalassemia.
How often should I get this test?
Your doctor will determine if this test is needed based on your symptoms, family history, or other risk factors. Some people may need it as part of routine screening, especially if they have a family history of hemoglobin disorders.
Can I prevent hemoglobin variants?
While you can’t change your genes, certain lifestyle choices may help manage symptoms if you have a known condition. This includes staying hydrated, avoiding smoking, and following your doctor’s recommendations for pain relief or blood transfusions.
  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