Nucleic Acid Detection for SARS-CoV-2 (COVID-19) by Reverse Transcription Polymerase Chain Reaction (RT-PCR)
This test detects genetic material from the SARS-CoV-2 virus, which causes COVID-19, using a nasal swab sample. It helps determine if you have an active infection.
["Identifies whether you currently have COVID-19 by detecting the virus’s genetic material."]
Key facts at a glance
- LOINC
- 100345-8
- Short code
- FLUABV+SARS-CoV-2 RNA Pnl Spec NAA+probe
- Synonyms
- FLUABV+SARS-CoV-2 RNA Pnl Spec NAA+probe
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- probe-amp-tar
- 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
How the Test Works
A healthcare provider collects a sample from your nose using a swab. The swab is then sent to a lab where genetic material from the virus is extracted and analyzed. The test uses a process called reverse transcription polymerase chain reaction (RT-PCR) to identify the virus’s unique genetic sequence.
What to Expect Before the Test
You may experience mild discomfort or irritation when the swab is inserted, but it usually lasts only a few seconds. Avoid using nasal decongestants or sprays before the test, as they can affect results.
What to Expect After the Test
Most people do not experience any significant side effects. If you feel dizzy or have a sore throat afterward, it is likely due to the swab insertion and should resolve quickly. Follow up with your healthcare provider if you have concerns.
When This Test Is Needed
Your healthcare provider may recommend this test if you have symptoms of COVID-19 (such as fever, cough, or shortness of breath), have been exposed to someone with COVID-19, or are required for travel, work, or school purposes.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test plays a critical role in diagnosing active COVID-19 infections, guiding treatment decisions, and controlling the spread of the virus. Early detection helps prevent further transmission and allows for timely medical intervention if needed.
Short name
COVID-19 RT-PCR Test (Nasal Swab)
Frequently asked questions
Why might I need this test even if I don’t have symptoms?
How long does it take to get results?
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