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Cerebrospinal fluid (CSF) total protein by nephelometry

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

This test measures the total amount of protein found in your cerebrospinal fluid (the fluid surrounding your brain and spinal cord). Protein levels can help doctors assess conditions affecting the central nervous system.

Quick summary

["Protein in CSF may signal inflammation, bleeding, or other issues in your brain or spinal cord."]

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

Key facts at a glance

LOINC
9567-9
Short code
MuV Ab Titr CSF CF
Synonyms
MuV Ab Titr CSF CF
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
comp-fix
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may order this test if you have symptoms like headaches, neck stiffness, confusion, or neurological problems. It’s also used to diagnose or monitor conditions such as infections (like meningitis), multiple sclerosis, or tumors in the central nervous system.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your back to collect a sample of CSF, often done under mild sedation. The procedure takes a few minutes, and you may feel mild discomfort.

What the Results Mean

Normal protein levels in CSF are generally lower than in blood. Elevated levels may indicate inflammation, infection, or blood leakage into the CSF. Very low levels might suggest certain genetic or metabolic disorders.

Common Conditions Affecting Results

High protein levels can be linked to conditions like multiple sclerosis, Guillain-Barré syndrome, or infections. Low protein levels may be seen in rare genetic disorders or certain metabolic diseases.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CSF Protein Level

Frequently asked questions

What causes abnormal protein levels in CSF?
Abnormal protein levels in CSF can result from inflammation (like meningitis), blood leakage (e.g., from a head injury), or certain neurological diseases. Your doctor will consider your symptoms and other test results to determine the cause.
How long does it take to get results from this test?
Results are typically available within 24 to 48 hours, depending on lab processing times. Your healthcare provider will discuss the findings with you during your follow-up visit.
Can diet or medications affect this test?
Diet or over-the-counter medications usually don’t affect CSF protein levels. However, certain medications (like steroids) or recent infections may influence results, so discuss any recent changes with your doctor.
  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