Skip to content

Cryoglobulin Detection (Cold Agglutinin Test)

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

This test measures the presence of abnormal proteins called cryoglobulins in your blood that clump together when cooled. These proteins may indicate certain immune system conditions.

Quick summary

["Cold agglutinins can signal underlying health concerns that may require further medical evaluation."]

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

Key facts at a glance

LOINC
12204-4
Short code
Cryoglob Ser Ql 4D Cold Inc
Synonyms
Cryoglob Ser Ql 4D Cold Inc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
d-cold-incubation
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 a Cryoglobulin?

Cryoglobulins are proteins found in your blood that can form clumps (agglutinate) when exposed to cold temperatures. These clumps can block blood flow and cause tissue damage if left untreated. They are often associated with immune system disorders.

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms like fatigue, joint pain, skin rashes, or unexplained fevers, especially if they occur in cold environments. It can also be part of evaluating conditions like vasculitis or chronic infections.

How Is the Test Performed?

A blood sample is drawn from a vein in your arm. The sample is then cooled to detect any clumping (agglutination) of cells or proteins. If clumps form, it confirms the presence of cryoglobulins.

What Are Possible Results?

A positive result means cryoglobulins are present, which may need further testing to determine the underlying cause. A negative result means no clumping was observed at cold temperatures.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Cold Agglutinin Test

Frequently asked questions

How often should I get this test?
This test is typically ordered as needed based on symptoms or medical concerns. Your doctor will determine the frequency based on your condition and treatment plan.
What are the normal ranges for this test?
There are no standard numeric ranges for cryoglobulin detection since it’s qualitative. A positive result indicates the presence of abnormal proteins, while a negative result means no clumping was detected.
Can I take anything special before this test?
No special preparations are needed. However, avoid eating or drinking anything (except water) for 2–4 hours before the blood draw if instructed by your provider.
  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