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C-reactive protein (CRP) with probe-based signal amplification (e.g., immunoassay or similar method)

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

This test measures a protein produced by your liver in response to inflammation, often used to track infection, injury, or autoimmune activity.

Quick summary

["Helps monitor inflammation levels in your body."]

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

Key facts at a glance

LOINC
28008-1
Short code
CMV DNA Bld Ql Probe+sig amp
Synonyms
CMV DNA Bld Ql Probe+sig amp
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-sig
CPT
82784
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 This Test Might Be Ordered

Your healthcare provider may recommend this test to check for signs of inflammation, assess infection, evaluate autoimmune conditions, or monitor treatment responses. It’s sometimes used alongside other tests to get a clearer picture of your health status.

How the Test Works

A small blood sample is taken, and the CRP protein is detected using a sensitive immunoassay method that amplifies the signal for precise measurement. This helps ensure accurate results even when CRP levels are low.

What to Expect Before the Test

No special preparation is needed. You can eat and drink normally, but let your provider know if you’re on blood-thinning medications or have a history of bleeding disorders.

Common Uses and Interpretations

Elevated CRP levels may indicate inflammation, infection, or tissue damage, while normal levels suggest minimal inflammation. However, results alone don’t diagnose conditions—they’re part of a broader assessment.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical significance: CRP is a non-specific marker of inflammation. It’s widely used in clinical settings to guide decisions about further testing, treatment adjustments, or follow-up care, especially in conditions like infections, autoimmune diseases, or cardiovascular risk assessment.

Short name

CRP with advanced detection

Frequently asked questions

What does a high CRP level mean?
A high CRP level suggests inflammation is present in your body, which could be due to infection, injury, or an autoimmune condition. Your doctor will consider this along with other test results and symptoms to determine the cause.
Can CRP levels change over time?
Yes, CRP levels can fluctuate based on your health status, recent illnesses, medications, or other factors. Regular monitoring may be needed if you have chronic conditions like arthritis or heart disease.
Does diet or exercise affect CRP levels?
Yes, lifestyle factors like diet, exercise, and stress can influence inflammation. Eating anti-inflammatory foods, staying active, and managing stress may help lower CRP levels over time.
  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