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C-Reactive Protein (CRP) by Immunoassay (High-Sensitivity)

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

This test measures a protein in your blood that signals inflammation, often used to check for signs of infection, injury, or autoimmune conditions.

Quick summary

["hs-CRP helps track inflammation, which may indicate underlying health concerns like infections or chronic diseases."]

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

Key facts at a glance

LOINC
47063-3
Short code
T palldm IgM CSF IF-aCnc
Synonyms
T palldm IgM CSF IF-aCnc
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
if
CPT
82784
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your doctor may order this test to monitor inflammation, evaluate symptoms like fever or joint pain, or assess risk for conditions like heart disease or certain infections. High levels may suggest an active inflammatory process.

What Does the Result Mean?

Results are not given in absolute numbers here—your doctor will interpret them based on your symptoms and medical history. Elevated levels may prompt further testing or treatment adjustments.

Common Reasons for Testing

Common reasons include checking for infections (e.g., pneumonia, sepsis), monitoring autoimmune diseases (e.g., rheumatoid arthritis), or assessing cardiovascular risk before procedures.

What to Expect Before the Test

No special preparation is needed. A blood sample is drawn from a vein, usually in your arm. You may feel a slight pinch, but it’s quick and painless.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

High-sensitivity CRP is a sensitive marker of inflammation. While it doesn’t diagnose specific conditions, it helps guide treatment decisions, especially in conditions where inflammation plays a role, such as cardiovascular disease or autoimmune disorders. Results should always be reviewed by a healthcare provider in the context of your overall health.

Short name

hs-CRP

Frequently asked questions

Will I need to avoid certain foods or drinks before the test?
No dietary restrictions apply. However, if you’re taking blood thinners or have recent trauma/infection, let your doctor know.
How long will I wait for results?
Results are typically available within 24–48 hours, depending on lab processing. Your doctor will discuss them with you.
Can I get this test at home?
No, this test requires a blood sample from a healthcare provider’s office or lab.
  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