High-Sensitivity C-Reactive Protein (hsCRP) in Serum
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.
["hsCRP helps track subtle inflammation that may not show up in other tests."]
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?
Can hsCRP levels change with lifestyle changes?
Is hsCRP the same as a regular CRP test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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