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Quantitative measurement of DNA concentration in plasma

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

This test measures the amount of DNA present in your blood plasma. It may be used to monitor certain conditions affecting cell turnover or to assess genetic material in the bloodstream.

Quick summary

["Plasma DNA levels can help track conditions like cancer or genetic disorders."]

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

Key facts at a glance

LOINC
104760-4
Short code
CMV DNA Spec Ql
Synonyms
CMV DNA Spec Ql
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
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 Is This Test Done?

Your healthcare provider may order this test to evaluate conditions involving abnormal cell death or genetic testing, such as monitoring cancer progression, detecting genetic mutations, or assessing conditions like acute kidney injury or certain infections. It can also be part of research studies or specialized diagnostic protocols.

What Does the Test Involve?

A blood sample is drawn from a vein, typically in your arm. The blood is then processed to separate plasma, which is analyzed for DNA concentration using advanced laboratory techniques.

What Should You Expect Before the Test?

No special preparation is usually needed, but you may be asked to fast for a few hours if your test involves a specific timing (e.g., 24-hour urine collection). Avoid smoking or consuming certain medications that could interfere with results.

What Are Possible Results?

Results are expressed as a concentration value (e.g., micrograms per milliliter or another unit). Your provider will compare these results to your clinical picture and any known conditions to interpret the meaning.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Plasma DNA Level

Frequently asked questions

What does a high or low plasma DNA level mean?
A high plasma DNA level may indicate conditions like cancer (where cells release DNA into the blood), severe tissue damage, or certain infections. A low level may suggest normal cell turnover or conditions where DNA release is reduced, but results depend on clinical context and additional testing.
Can lifestyle changes affect this test?
Some lifestyle factors, such as intense physical activity, stress, or certain medications, might temporarily influence DNA levels. However, plasma DNA testing is generally not highly sensitive to daily lifestyle changes unless a specific condition is being monitored.
Is this test painful or uncomfortable?
The blood draw is generally mild discomfort, similar to a routine blood test. Most people experience only a small pinch or slight soreness at the injection site, which usually fades quickly. You may feel lightheaded briefly if you stand up too fast after the test.
  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