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C-reactive protein (CRP) by nephelometry (high-sensitivity) in plasma

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

This blood test measures a protein produced by your liver in response to inflammation, helping doctors assess low-level inflammation in your body.

Quick summary

["High-sensitivity CRP helps track subtle inflammation that may not be detected by standard tests."]

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

Key facts at a glance

LOINC
93402-6
Short code
C sakazakii DNA Bld Pos Ql NAA+probe
Synonyms
C sakazakii DNA Bld Pos Ql NAA+probe
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your healthcare provider may order this test to monitor chronic conditions like heart disease, autoimmune disorders, or after surgery to check for lingering inflammation. It can also help evaluate risk for future health issues, such as heart attacks or strokes, in people without obvious symptoms of inflammation.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm to draw a blood sample. If you’re on blood thinners, let your provider know before the test.

What the Results Mean

Results are reported in milligrams per liter (mg/L). Higher levels may indicate inflammation, infection, or other health concerns. Your provider will interpret results in the context of your overall health and medical history.

Common Causes of Elevated CRP Levels

Elevated CRP can be caused by infections, injuries, or conditions like arthritis, heart disease, or certain cancers. It may also rise after surgery or during stress.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

hs-CRP (high-sensitivity C-reactive protein)

Frequently asked questions

What does a high CRP level mean?
A high CRP level suggests your body is experiencing inflammation. While it doesn’t pinpoint the cause, it may signal an infection, injury, or underlying health issue that your doctor will investigate further.
Can I lower my CRP level naturally?
Yes! Lifestyle changes like improving diet (e.g., reducing processed foods), staying active, managing stress, and quitting smoking can help lower CRP levels over time. Always discuss these changes with your healthcare provider.
Does CRP change with age?
Yes, CRP levels can vary with age. Older adults may naturally have slightly higher CRP levels due to chronic inflammation or other age-related factors. Your provider will consider your age and overall health when interpreting results.
  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