Skip to content

Hemoglobin Variants by Surface Antigen Fluorescence Detection (Serum)

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

This test helps identify different types of hemoglobin in your blood, which can be important for diagnosing conditions like sickle cell disease or other inherited blood disorders.

Quick summary

["This test checks for variations in your red blood cells’ hemoglobin structure."]

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

Key facts at a glance

LOINC
51659-1
Short code
HBV surface Ag Fld Ql
Synonyms
HBV surface Ag Fld Ql
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 fatigue, pain, or frequent infections, or if you have a family history of blood disorders. It can also be used as part of routine screening for certain genetic conditions.

How the Test Works

A small blood sample is drawn, and the hemoglobin is analyzed using a specialized fluorescence detection method to separate and identify different hemoglobin variants.

What to Expect Before the Test

No special preparation is needed. You may have a slight bruise or discomfort at the injection site, but this usually fades quickly. If you’re on blood thinners, let your provider know before the test.

What to Expect During the Test

The test involves a quick venipuncture (blood draw) from a vein in your arm. You may feel a brief pinch, but the procedure itself takes only a few minutes.

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 Screening (Serum)

Frequently asked questions

What does a positive or abnormal result mean?
An abnormal result may indicate the presence of an unusual hemoglobin variant, which could be linked to genetic conditions. Your healthcare provider will discuss the results with you and may recommend further testing or follow-up to determine the next steps.
How long does it take to get results?
Results are typically available within 24 to 48 hours, depending on your lab’s processing schedule. Your provider will contact you once they are ready to share the findings with you.
Can I eat or drink before this test?
You can eat and drink normally before this test, as no special preparation is required. However, if you’re scheduled for a different blood test that day, follow any specific instructions provided by your healthcare team.
  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