COVID-19 Vaccination Status Confirmation (Serum Antibody Test)
This test checks for antibodies in your blood that may have developed after exposure to COVID-19 or vaccination.
["This test helps confirm if your immune system has recognized COVID-19 (either from infection or vaccination)."]
Key facts at a glance
- LOINC
- 98172-0
- Short code
- ACCEPTEDORWILLACCEPTCOVID19VACCINATIONONCEOFFERED
- Synonyms
- —
- Category
- coagulation
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 0.8
- Ref high
- 1.2
- Critical range
- — – 5 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 85610
- SNOMED
- 396252006
- 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’ve been vaccinated against COVID-19 or exposed to it to verify your immune response. It can also help assess immunity in certain situations, such as after a recent infection or before traveling to areas with higher risk.
What to Expect Before the Test
No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. The test looks for antibodies (like IgG or IgA) that your body produces in response to the virus or vaccine.
What the Test Results Mean
Positive results indicate your immune system likely produced antibodies after vaccination or infection. Negative results mean no detectable antibodies were found at this time, which doesn’t rule out past exposure.
Common Misconceptions
This test does not confirm active infection with COVID-19. It only checks for past exposure or vaccination-induced immunity. If you’re unsure about your vaccination status or symptoms, consult your provider.
Reference range
INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A
Inform your healthcare provider if you are taking blood thinners. No special preparation required.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance: This test helps determine immunity levels for vaccination recommendations, travel clearance, or monitoring immune response post-vaccination. It’s not a substitute for ongoing COVID-19 monitoring or testing for active illness.
Short name
COVID Antibody Test
Frequently asked questions
Will this test show if I had COVID-19 before?
How long after vaccination should I wait for this test?
Can I get this test at home?
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