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C-Reactive Protein (CRP)
Test CodeQCRP
Quest Code
4420
CPT Codes
86140
Preferred Specimen
1 mL serum
Minimum Volume
0.5 mL
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 30 days
Frozen: 1 year
Refrigerated: 30 days
Frozen: 1 year
Methodology
Immunoturbidimetric
Setup Schedule
Set up: Mon-Fri; Report available: 1 day
Limitations
Oral contraceptives, IUDs, pregnancy, and menstruation may raise CRP levels. Levels are lowest during ovulation.
Reference Range
<8.0 mg/L
Clinical Significance
Increased CRP levels are found in inflammatory conditions including: bacterial infection, rheumatic fever, active arthritis, myocardial infarction, malignancies and in the post-operative state. This test cannot detect the relatively small elevations of CRP that are associated with increased cardiovascular risk.
Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Dr
Chantilly, VA 20153