SARS-CoV-2 Nucleic Acid Test (Qualitative, Serum/Plasma)
This test detects genetic material from the virus responsible for COVID-19 in your blood. It helps determine if you have an active infection.
["This test checks for COVID-19 virus presence in your bloodstream."]
Key facts at a glance
- LOINC
- 99596-9
- Short code
- SARS-CoV-2 N IgG SerPl Ql IA
- Synonyms
- SARS-CoV-2 N IgG SerPl Ql IA
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ia
- CPT
- 82784
- 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
What This Test Measures
The test looks for the virus’s genetic material (nucleic acids) in your blood, specifically from SARS-CoV-2. This is done using a molecular method that identifies fragments of the virus’s DNA or RNA. If these fragments are found, it suggests you may have an active COVID-19 infection.
How the Test Works
A small blood sample is taken and processed to extract viral genetic material. The test then uses a highly sensitive technique to detect these fragments, which are compared to known virus sequences. If the virus is present, the test will confirm it.
Why It’s Done
This test is often used to diagnose COVID-19, especially in people who are symptomatic or at higher risk of infection. It can also help monitor the progression of the disease or guide treatment decisions.
Sample Collection and Preparation
A healthcare provider will draw blood from a vein in your arm. The blood sample is then sent to a lab for processing. The test typically requires a fresh sample, though some labs may use stored samples if available.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
A positive result indicates the presence of SARS-CoV-2 nucleic acids, strongly suggesting an active COVID-19 infection. This can guide treatment decisions, such as starting antiviral therapy or isolating to prevent spreading the virus. A negative result means the virus was not detected in the sample at the time of testing, but it does not rule out infection if symptoms persist or if testing was done too early. Results should always be interpreted by a healthcare provider in the context of your symptoms and medical history.
Frequently asked questions
When Might I Get This Test?
How Long Does It Take to Get Results?
Can I Have False Results?
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