Creatinine, Serum or Plasma
0020025
Ordering Recommendation

Screening test to evaluate kidney function.

Mnemonic
CRT
Methodology
Quantitative Enzymatic
Performed
Sun-Sat
Reported
Within 24 hours
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
 
Collect
Plasma separator tube or serum separator tube. 
Specimen Preparation
Allow serum tube to clot completely at room temperature. Separate serum or plasma from cells within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.2 mL) 
Storage/Transport Temperature
Refrigerated. 
Unacceptable Conditions
Specimens obtained through catheters used to infuse hyperalimentation fluid. Specimens with potassium oxalate/sodium fluoride, citrate, or EDTA as anticoagulants. 
Remarks
 
Stability
After separation from cells: Ambient: 1 week; Refrigerated: 1 week; Frozen: 3 months 
Reference Interval
By report (reports may vary based on instrumentation)
Interpretive Data


Note
Assay interference (negative) may be observed when high concentrations of N-acetylcysteine (NAC) are present. Negative interference has also been reported with NAPQI (an acetaminophen metabolite) but only with concentrations at or above those expected during acetaminophen overdose.
Hotline History
N/A
CPT Code(s)
82565
Components
Component Test Code*Component Chart NameLOINC
0020025Creatinine, Serum or Plasma2160-0
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please view this test within the Laboratory Test Directory found at www.aruplab.com
Aliases
  • Blood Creatinine
  • Creat
  • Serum Creatinine