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Chromosomal DNA or Chromosomal Material Analysis (from Whole Blood)

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

This test examines DNA or genetic material from your blood to check for abnormalities in your chromosomes, which are structures that carry your genetic information.

Quick summary

["This test helps identify potential genetic conditions that may affect your health."]

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

Key facts at a glance

LOINC
48000-4
Short code
Chromosome Bld/T
Synonyms
Chromosome Bld/T
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
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

What This Test Measures

The test analyzes chromosomal material (DNA) extracted from your red blood cells. Chromosomes are thread-like structures made of DNA and proteins that contain your genetic code. Abnormalities in chromosomes can lead to a variety of genetic disorders or conditions.

Why It’s Ordered

Your healthcare provider may order this test if you have symptoms of a genetic condition, a family history of chromosomal abnormalities, or if you are considering pregnancy and there are concerns about genetic risks.

Sample Collection and Preparation

A blood sample is collected from a vein in your arm. The sample is then processed to isolate chromosomal DNA. This process may involve centrifugation or other laboratory techniques to separate DNA from other blood components.

Testing Process

The isolated chromosomal DNA is analyzed using advanced laboratory techniques, such as fluorescence in situ hybridization (FISH) or karyotyping, to identify any structural or numerical abnormalities in your chromosomes.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Chromosome Blood Test

Frequently asked questions

What does this test detect?
This test can detect structural abnormalities (like deletions, duplications, or translocations) and numerical abnormalities (like extra or missing chromosomes). It is particularly useful for identifying conditions such as Down syndrome, Klinefelter syndrome, or other chromosomal disorders.
How long does it take to get results?
Results from this test typically take several days to a couple of weeks, depending on the complexity of the analysis and the laboratory’s workflow. Your healthcare provider will discuss the results with you once they are available.
Is this test covered by insurance?
Coverage for this test depends on your insurance plan and the reason it was ordered. It’s best to check with your insurance provider or ask your healthcare provider for details about what will be 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