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Plasma or Serum DNA (Quantitative, Probe-Based)

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

This test measures the amount of your body’s free circulating DNA in plasma or serum, often used in research or specialized testing for genetic studies.

Quick summary

["Understanding your DNA levels may help in certain genetic research or diagnostic contexts."]

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

Key facts at a glance

LOINC
101944-7
Short code
C parap DNA Ur Ql NAA+probe
Synonyms
C parap DNA Ur Ql NAA+probe
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What This Test Measures

The test detects free DNA fragments in your blood or serum, which can come from cell breakdown, infection, or other biological processes. This DNA is not part of your regular blood cells but may reflect underlying health or genetic factors being studied.

Why It Might Be Ordered

Your healthcare provider may order this test for research purposes, genetic testing, or monitoring conditions where DNA levels in the blood are relevant, such as certain cancers, infections, or genetic disorders.

Sample Collection and Preparation

A blood sample is typically drawn into a tube that separates plasma or serum from blood cells. The DNA is then extracted and analyzed using a specialized probe-based method to measure its concentration.

What to Expect Before the Test

No special preparation is needed for this test. You may eat or drink normally, but inform your provider if you are on blood-thinning medications or have bleeding disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

DNA Level (Plasma/Serum)

Frequently asked questions

What does a 'normal' result mean?
There is no single reference range for this test because it is often used in research settings or for specific diagnostic purposes. Your results will be interpreted by a healthcare provider based on the context of your health and the study’s requirements.
Will I need to repeat this test?
Depending on the reason for testing, your provider may recommend retesting if additional information is needed. Follow their guidance for follow-up.
Is this test covered by insurance?
Coverage depends on the reason for testing and your insurance plan. Check with your provider or insurance company to confirm if this specialized test is covered.
  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