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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 in your cerebrospinal fluid (the fluid surrounding your brain and spinal cord). Protein levels can help diagnose conditions affecting the central nervous system.

Quick summary

["Protein in CSF may signal inflammation, bleeding, or other neurological issues."]

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

Key facts at a glance

LOINC
109482-0
Short code
C trach IgA Msmt CSF
Synonyms
C trach IgA Msmt CSF
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your doctor may order this test if you have symptoms like headaches, neck stiffness, confusion, or neurological problems. It can also be part of a broader evaluation for conditions such as meningitis, multiple sclerosis, or brain tumors.

What to Expect Before the Test

No special preparation is needed. You may have a lumbar puncture (spinal tap) where a small amount of CSF is collected from your lower back. You might feel mild discomfort, but it’s usually brief.

What the Results Mean

Normal protein levels in CSF are usually lower than those in blood. Elevated levels may indicate inflammation, infection, or bleeding in the brain or spinal cord. Lower-than-normal levels can sometimes suggest certain genetic disorders.

Common Conditions Linked to Abnormal Results

High protein levels might be seen in conditions like meningitis, multiple sclerosis, or brain tumors. Low protein levels can occur in rare genetic disorders or certain metabolic conditions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CSF Protein Level

Frequently asked questions

What might cause elevated protein levels in CSF?
Elevated CSF protein can result from conditions that increase protein production or leakage into the CSF, such as infections (e.g., bacterial or viral meningitis), demyelinating diseases (e.g., multiple sclerosis), or certain tumors.
How does this test help doctors diagnose conditions?
This test helps identify whether protein levels are abnormal and may guide further testing, such as additional CSF analysis, imaging, or other blood tests to pinpoint the underlying cause.
Can diet or lifestyle affect this test result?
Diet or lifestyle changes typically do not affect CSF protein levels, as this fluid is produced and maintained by the brain’s own processes. However, avoid strenuous activity or caffeine before the test if instructed by 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