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MRI of the Brachial Plexus with Intravenous Contrast

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

MRI uses magnetic fields and intravenous contrast to examine the brachial plexus, the nerve network affecting shoulder, arm, and hand function.

Quick summary

["This imaging test helps identify problems affecting the nerves that control movement and sensation in the shoulder, arm, and hand."]

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

Key facts at a glance

LOINC
36239-2
Short code
MR Brachial plexus W contr IV
Synonyms
MR Brachial plexus 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 brachial plexus creates detailed pictures of the group of nerves running from the neck through the shoulder and arm. Intravenous contrast may be given to make certain tissues and abnormalities easier to see.

Why might I need this test?

This test may be recommended for arm pain, weakness, numbness, tingling, or muscle wasting. It can also be used to evaluate nerve injury, inflammation, compression, tumors, or the effects of nearby surgery or radiation.

How is the test performed?

You will lie still on a padded table while the MRI scanner takes images. If contrast is required, it is usually injected into a vein in your arm before or during the scan. The procedure generally takes 30 to 60 minutes.

How do I prepare for the test?

Tell the care team if you have metal implants, a pacemaker, pregnancy, kidney disease, or a history of contrast reactions. Follow the facility's instructions about eating, drinking, and taking medications, and bring any relevant imaging records.

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

Brachial Plexus MRI with Contrast

Frequently asked questions

Does the MRI use radiation?
No. MRI uses magnetic fields and radio waves rather than ionizing radiation. The injected contrast is different from the contrast used for standard X-ray or CT imaging.
Is intravenous contrast always required?
The order for this study includes contrast, although the imaging team may adjust the protocol based on the clinical question and your medical history.
Will I feel anything during the scan?
The scanner may make loud knocking sounds, and you may feel brief pressure when contrast is injected. Tell the staff immediately if you experience severe pain, dizziness, itching, or difficulty breathing.
  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