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MRI of the Left Brachial Plexus with IV Contrast

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

An MRI that uses injected contrast to examine the left brachial plexus, the network of nerves between the neck and arm.

Quick summary

["This MRI provides detailed images of the left brachial plexus to help evaluate nerve-related shoulder or arm symptoms."]

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

Key facts at a glance

LOINC
36240-0
Short code
MR Brachial plexus-L W contr IV
Synonyms
MR Brachial plexus-L W contr IV
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
mr
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?

Magnetic resonance imaging (MRI) of the left brachial plexus creates detailed pictures of the nerves running from the neck through the shoulder and arm. Intravenous contrast may be used to make inflammation, injury, or other abnormalities easier to see.

Why might I need this test?

This test may be recommended for symptoms such as shoulder or arm pain, numbness, tingling, weakness, or reduced muscle size. It can help assess possible nerve compression, inflammation, injury, or other structural problems affecting the left arm.

How is the test performed?

You will lie on a padded table that moves into the MRI scanner. The technologist may position your head, neck, shoulder, or arm to obtain clear images, and intravenous contrast is usually given through a vein in your arm if contrast is required.

How do I prepare for the test?

Follow the imaging center's instructions about medications, eating, and drinking before the appointment. Tell the care team about any implanted devices, metal in your body, prior contrast reactions, kidney disease, or possible pregnancy before entering the scanner.

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

Left Brachial Plexus MRI with Contrast

Frequently asked questions

Does this MRI use radiation?
No. MRI uses a magnetic field and radiofrequency waves rather than ionizing radiation, although the injected contrast is a medication that can occasionally cause side effects.
What is IV contrast used for in this MRI?
IV contrast helps highlight areas of inflammation, abnormal tissue, or disease involving the nerves and surrounding structures. The technologist will usually inject it into a vein before taking the images.
Will I be able to drive home after the test?
Most people can leave normally after the examination. If you received sedating medication or the care team advises otherwise because of a contrast reaction, additional observation or transportation may be needed.
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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