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CT Brachial Plexus Without Contrast

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

A CT scan uses X-rays to create detailed images of the brachial plexus, the network of nerves between the neck and armpit.

Quick summary

["This scan evaluates the structure of the brachial plexus and may identify masses, nerve damage, inflammation, or other abnormalities."]

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

Key facts at a glance

LOINC
89836-1
Short code
CT Brachial plexus WO contr
Synonyms
CT Brachial plexus WO contr
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
44
Ref high
147
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ct
CPT
84075
SNOMED
27550007
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 is this test?

A CT brachial plexus scan is a computed tomography imaging test that creates detailed cross-sectional images of the brachial plexus. The brachial plexus is a network of nerves that controls sensation and movement in the shoulder, arm, and hand.

Why might I need this test?

This test may be ordered to investigate arm or shoulder pain, weakness, numbness, or loss of muscle function. It can also help evaluate a suspected mass, injury, inflammation, or other condition affecting the nerves in the brachial plexus.

How is the test performed?

You will lie on a CT table while an X-ray machine rotates around you and takes multiple images. The scan is generally painless, and images are reviewed by a radiologist. This test is performed without injected contrast.

How do I prepare for the test?

Tell the imaging team if you are pregnant or may be pregnant and if you have metal implants, allergies, or previous reactions to contrast material. Follow the facility's instructions, remove loose metal objects, and ask whether any changes to medications are needed.

Reference range

Adult: 44-147 U/LN/A

Specimen: serum

No special preparation required. Avoid fatty meals before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CT Brachial Plexus Without Contrast

Frequently asked questions

Does this CT scan use contrast dye?
No. The test name indicates that it is performed without injected contrast material. The imaging center may still ask about allergies or prior contrast reactions for safety and screening purposes.
Is a CT brachial plexus scan painful?
The scan itself is usually painless, although you may need to remain very still. Some people feel anxious in the enclosed scanner and can ask the technologist about options to reduce anxiety.
Can this test diagnose the cause of my arm symptoms?
It may identify structural problems affecting the brachial plexus, but it may not determine the exact cause by itself. Your clinician may combine the results with your symptoms, examination, and other tests to make a diagnosis.
  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