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Test ID CRP C-Reactive Protein (CRP), Serum

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

Method Name

Immunoturbidimetric Assay

Reporting Name

C-Reactive Protein (CRP), S

Specimen Type


Advisory Information

To assess the risk of cardiovascular disease or events using C-reactive protein, order HSCRP / C-Reactive Protein, High Sensitivity, Serum.

Necessary Information

Indicate patient's age and sex.

Specimen Required


Preferred: Serum gel

Acceptable: Red top

Specimen Volume: 0.5 mL

Collection Instructions:

1. Serum gel tube should be centrifuged within 2 hours of collection.

2. Red-top tube should be centrifuged and aliquoted within 2 hours of collection.

Specimen Minimum Volume

0.25 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 14 days
  Frozen  14 days
  Ambient  72 hours

Reference Values

≤8.0 mg/L

Day(s) and Time(s) Performed

Monday through Sunday; Continuously

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
CRP C-Reactive Protein (CRP), S 1988-5


Result ID Test Result Name Result LOINC Value
CRP C-Reactive Protein (CRP), S 1988-5

Test Classification

This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.