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Cerebrospinal Fluid (CSF) Protein by Turbidimetry (Qualitative)

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

This test checks the protein levels in your cerebrospinal fluid (the fluid surrounding your brain and spinal cord) using a simple visual method.

Quick summary

["A qualitative protein test in CSF helps identify potential issues with your brain’s protective barrier or inflammation."]

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

Key facts at a glance

LOINC
111354-7
Short code
Cryptoc Ag Msmt CSF
Synonyms
Cryptoc Ag Msmt CSF
Category
coagulation
Sample
csf
Container
Sterile tube
Units
N/A
Ref low
0.8
Ref high
1.2
Critical range
— – 5 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
85610
SNOMED
396252006
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

What Does This Test Measure?

The test measures the presence of proteins in your CSF, which can indicate whether protein levels are unusually high or low. This may suggest conditions like infections, bleeding, or other neurological problems.

Why Might You Need This Test?

Your doctor may order this test if you have symptoms like headaches, neck stiffness, confusion, or signs of neurological issues. It’s also used in diagnosing conditions like meningitis, multiple sclerosis, or tumors.

Common Conditions It Helps Diagnose

High protein levels in CSF might point to infections (e.g., meningitis), demyelinating diseases (e.g., multiple sclerosis), or other inflammatory or neoplastic processes. Low protein levels are less common but may occur in certain genetic disorders or rare conditions.

What to Expect Before or After the Test

You’ll likely have a small needle inserted into your back to collect CSF. The procedure is quick but may cause mild discomfort. No special preparation is needed, but inform your doctor about any medications or allergies.

Reference range

INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A

Specimen: csf

Inform your healthcare provider if you are taking blood thinners. No special preparation required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CSF Protein Qualitative

Frequently asked questions

What causes abnormal protein levels in CSF?
Abnormal protein levels in CSF can result from infections (like bacterial or viral meningitis), autoimmune diseases (such as multiple sclerosis), brain tumors, or other neurological conditions. Your doctor will consider your symptoms and test results to determine the cause.
How long does it take to get results?
Results are typically available within a few hours to a couple of days, depending on lab processing. Your doctor will discuss them with you during your follow-up visit.
Can diet or medications affect this test?
Diet or common medications usually don’t affect this test, but certain medications (like steroids) or recent infections may influence protein levels. Always share your full medical history 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