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Test Code Billings Clinic: 8815 C-Reactive Protein (CRP), Plasma

Additional Codes

Ordering Mnemonic
MayoAccess: BCL228

Performing Laboratory

Billings Clinic Laboratory: Chemistry

Useful For

  • Detecting systemic inflammatory processes
  • Detecting infection and assessing response to antibiotic treatment of bacterial infections
  • Differentiating between active and inactive disease forms with concurrent infection

Note: Screening the entire adult population is not recommended. Acute coronary syndrome management should not depend on CRP measurements. CRP is not a substitute for traditional cardiovascular risk factors. CRP is also increased in injury, fever, and infection.

Methodology

Turbidimetric/Immunoturbidimetric

Specimen Requirements

  • Draw blood in a green-top (lithium heparin) tube(s).
  • Immediately spin down and separate plasma from cells.
  • Send 0.5 mL of heparinized plasma refrigerated in plastic vial.
  • If specimen will not arrive at Billings Clinic within 7 days, send frozen.

Storage/Stability

Specimen Type Temperature Time
Plasma Refrigerated (preferred) 7 days
  Frozen 8 months

 

Reject Due To

  • Lipemia
  • Avoid repeated freeze/thaw cycles

Reference Values

0 - 2 months:                 0.0 - 0.9 mg/dL

2 months - 150 years:   <0.29 mg/dL

Day(s) Test Set Up

Daily

Test Classification and CPT Coding

86140 - C-reactive protein

LOINC Code Information

Reporting Name LOINC Code
C-Reactive Protein 1988-5