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DNA Fragmentation Index (measured via a qualitative assay on whole blood)

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

This test evaluates the presence of fragmented DNA in your blood, which may indicate stress on your cells or certain health conditions.

Quick summary

["Assessing DNA fragmentation can help identify when your body’s cells are under unusual stress or damage."]

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

Key facts at a glance

LOINC
104620-0
Short code
DNA fragmentation index Smn FC-sRto
Synonyms
DNA fragmentation index Smn FC-sRto
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
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

DNA fragmentation refers to the breakdown of DNA strands into smaller pieces. Normally, this happens naturally during cell death, but elevated levels can signal excessive cell stress, such as during trauma, infection, or certain diseases. This test detects these fragments qualitatively, meaning it provides a yes/no or present/absent result rather than a precise measurement.

Why It Might Be Ordered

Your healthcare provider may order this test to investigate symptoms like fatigue, unexplained bruising, or signs of systemic inflammation. It can also be part of a broader evaluation for conditions affecting cell health, such as autoimmune diseases or severe infections.

Sample Collection and Preparation

A small blood sample is drawn from your arm. The test is performed on whole blood, and results are typically reported as qualitative (positive or negative for DNA fragmentation). No special preparation is needed, but fasting may not be required unless specified by your provider.

What the Results Mean

A positive result (detecting fragmented DNA) suggests your cells may be experiencing stress or damage. This could be due to acute events like trauma, severe illness, or chronic conditions. A negative result means no significant fragmentation was detected in this sample.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

DNA Fragmentation Index (DNA Frag Index)

Frequently asked questions

How is this test used in diagnosis or monitoring?
This test is often used as a screening tool to identify potential cell stress or damage, especially in cases where other tests are inconclusive. It may complement other investigations, such as complete blood counts or inflammatory markers, but it is not a standalone diagnostic test for any specific condition.
What are the typical reference ranges or thresholds for this test?
This test is qualitative, so there are no numeric reference ranges. Instead, results are interpreted based on clinical context and comparison to your baseline or symptoms. Your healthcare provider will discuss the meaning of your result in relation to your overall health and medical history.
Can this test be used to monitor chronic conditions like cancer or autoimmune diseases?
While this test can help detect acute cell stress, it is not typically used for routine monitoring of chronic conditions. It may be considered in specific cases, such as evaluating response to treatment or assessing severe complications, but further testing would usually be needed for ongoing management.
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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