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High-Sensitivity C-Reactive Protein (hsCRP) in Serum

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

This test measures a protein in your blood that rises when inflammation is present, often used to assess low-level inflammation or risk of heart disease.

Quick summary

["hsCRP helps track subtle inflammation that may not show up in other tests."]

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

Key facts at a glance

LOINC
35421-7
Short code
HSV Ear Cult
Synonyms
HSV Ear Cult
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
organism-specific-culture
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 High-Sensitivity CRP?

High-sensitivity C-reactive protein (hsCRP) is a marker produced by your liver in response to inflammation. It can detect even small amounts of inflammation in your body, which may not be visible on other tests. This test is particularly useful for monitoring chronic, low-grade inflammation that could contribute to conditions like heart disease or autoimmune disorders.

Why Might Your Doctor Order This Test?

Your doctor may order hsCRP to evaluate your risk for cardiovascular problems, monitor chronic inflammatory conditions, or check for signs of infection or injury before surgery. It can also help assess how well certain treatments are working for conditions like arthritis or other inflammatory diseases.

How Is the Test Performed?

A blood sample is drawn from a vein, usually in your arm. The blood is then processed to separate serum (the liquid part after clotting) for testing. The test measures the concentration of hsCRP in your serum using a sensitive immunoassay method.

What Does a High or Low Result Mean?

Results are not provided with specific numeric ranges on this site, but doctors use them to compare against general guidelines. High levels of hsCRP may indicate increased inflammation, which could raise concerns about heart disease risk or other inflammatory conditions. Low levels suggest minimal inflammation. Your doctor will interpret results in the context of your overall health and medical history.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

hsCRP

Frequently asked questions

What does a high hsCRP level mean for my health?
A high hsCRP level may signal chronic inflammation, which could be linked to conditions like atherosclerosis (hardening of the arteries), autoimmune diseases, or infections. It’s not a definitive diagnosis but often used alongside other tests to guide treatment or risk assessment. Always discuss results with your healthcare provider.
Can hsCRP levels change with lifestyle changes?
Yes, lifestyle factors like diet, exercise, smoking, and stress can influence inflammation levels. Improving these habits—such as eating heart-healthy foods, quitting smoking, and managing stress—may help lower hsCRP levels over time. Your doctor may recommend specific changes based on your test results.
Is hsCRP the same as a regular CRP test?
No, hsCRP is a more sensitive version of the traditional CRP test. It can detect smaller amounts of inflammation, making it useful for monitoring conditions where subtle changes matter, such as early heart disease or chronic inflammation. Your doctor may use both types of tests depending on the clinical situation.
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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