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COVID-19 Nucleic Acid Test (Qualitative)

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

This test detects the genetic material (nucleic acids) from the virus responsible for COVID-19 to confirm if you have an active infection.

Quick summary

["Helps determine if you’re currently infected with COVID-19."]

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

Key facts at a glance

LOINC
100861-4
Short code
CD4+154/CD4 p COVID NuclCap
Synonyms
CD4+154/CD4 p COVID NuclCap
Category
coagulation
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

How the Test Works

A small sample of your respiratory secretions (like nasal or throat swab) is collected and tested for the virus’s genetic material. If the virus is present, the test can detect it within hours of collection.

Sample Collection

You’ll likely have a swab inserted into your nose or throat to collect a sample. The test is usually done at a healthcare facility or testing site.

When You Might Need This Test

This test is commonly used if you have symptoms of COVID-19, have been exposed to someone with the virus, or are required for travel, work, or school purposes.

What to Expect After the Test

Results are typically available within 24 hours, though some labs may provide results sooner. If you test positive, follow your healthcare provider’s guidance on isolation and treatment.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

COVID-19 PCR Test

Frequently asked questions

Why did my doctor order this test?
Your doctor may recommend this test if you have symptoms of COVID-19, have been exposed to someone with the virus, or are in a setting where testing is required (e.g., travel, workplace, or school).
What does a positive result mean?
A positive result means you are currently infected with COVID-19. You should isolate from others, monitor for worsening symptoms, and follow guidance from public health officials or your healthcare provider.
Can I get this test at home?
Some at-home COVID-19 tests detect viral antigens (protein) rather than nucleic acids, so they may not be the same as this test. If you need a nucleic acid test, you’ll typically need to visit a testing site or clinic.
  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