Skip to content

Hemoglobin Variants Surface Antibody Titration (Serum/Plasma)

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

This test measures the presence and level of antibodies against different forms of hemoglobin, which are proteins in red blood cells. It helps identify if your body has developed an immune response to abnormal hemoglobin variants.

Quick summary

["This test helps diagnose conditions where hemoglobin structure differs from normal, potentially affecting blood health."]

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

Key facts at a glance

LOINC
32019-2
Short code
HBV surface Ab Titr Ser
Synonyms
HBV surface Ab Titr Ser
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
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
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

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms like anemia, fatigue, or if you have a family history of hemoglobin disorders (such as sickle cell disease or thalassemia). It can also be used to monitor immune responses in certain blood-related conditions or after exposure to hemoglobin variants.

What to Expect Before the Test

You will typically provide a blood sample (serum or plasma) via a simple venipuncture. No special preparation is usually needed, but inform your provider about any medications or recent blood transfusions.

What the Test Results Mean

Results indicate the antibody levels against hemoglobin variants. Higher levels may suggest an immune response, while lower or absent levels may indicate no reaction. Interpretation depends on clinical context and your symptoms.

Common Conditions Monitored

This test is often used in patients with hereditary hemoglobin disorders, those undergoing blood transfusions, or individuals with suspected autoimmune reactions to hemoglobin variants.

Reference range

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

Specimen: serum

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.

◆Associated findings1

Short name

Hemoglobin Variant Antibody Test

Frequently asked questions

What does a positive result mean?
A positive result means your blood contains detectable antibodies against hemoglobin variants. This could suggest an immune response, potentially linked to conditions like autoimmune disorders or reactions to abnormal hemoglobin forms. Your provider will discuss next steps based on your symptoms and test results.
How often will I need this test?
The frequency depends on your medical condition. If you have a known hemoglobin disorder or are monitored for immune responses, your provider may recommend regular testing. Follow their guidance for scheduling.
Can I eat or drink before this test?
No special diet or fasting is required for this test. However, inform your healthcare provider about any medications or supplements you take, as they may affect 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