ARUP's Laboratory Test Directory

Creatinine, Serum or Plasma : 0020025

Mnemonic: CRT

Methodology: Quantitative Enzymatic
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: 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.

Stability (collection to initiation of testing): After separation from cells: Ambient: 4 hours; Refrigerated: 1 week; Frozen: 6 months

Reference Interval:
By report (reports may vary based on instrumentation)
CPT Code(s): 82565