Blood Group Antibody Screening (Serum) by Immunohematology
This test checks for antibodies in your blood that may react against certain red blood cell antigens, helping identify potential blood compatibility issues or immune responses.
Helps determine if you have antibodies that could affect blood transfusions or pregnancy outcomes.
Key facts at a glance
- LOINC
- 50962-0
- Short code
- XXX blood group IgG Titr SerPl
- Synonyms
- XXX blood group IgG Titr SerPl
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 8
- Ref high
- 61
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82977
- SNOMED
- 3110003
- 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
Doctors may order this test if you’re preparing for a blood transfusion, expecting a baby, or experiencing symptoms like anemia, jaundice, or unexplained bleeding. It also helps screen donors for compatibility before transfusions.
What to Expect During the Test
A small blood sample is drawn from a vein in your arm. The serum (liquid part of blood without clots) is tested for specific antibodies using a method called immunohematology, which detects reactions with known red blood cell antigens.
How the Results Are Interpreted
Results are qualitative (yes/no) and indicate whether antibodies are present. Positive findings mean further testing (confirmation) may be needed to identify which specific antibodies are present.
Preparation for the Test
No special preparation is needed. You can eat, drink, or take medications as usual on the day of the test. Avoid alcohol or strenuous activity before the draw if advised by your doctor.
Reference range
Adult males: 8-61 U/L; Adult females: 5-36 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Positive results can signal potential risks for blood transfusions, pregnancy complications (such as hemolytic disease of the fetus and newborn), or autoimmune conditions. It’s critical for safe blood donation and patient care in emergency or elective surgeries.
Short name
IgG Antibody Screening (Blood)
Frequently asked questions
What does a positive result mean?
How long does it take to get results?
Can I fast before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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