ARUP's Laboratory Test Directory

Creatine, Serum or Plasma : 2002340

Mnemonic: CRTN SP

Methodology: Liquid Chromatography/Tandem Mass Spectrometry
Performed: Mon
Reported: 2-9 days
Specimen Required: Collect: Plain red, serum separator tube, green (sodium or lithium heparin), or lavender (EDTA).

Specimen Preparation: Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube and freeze immediately. (Min: 0.2 mL)

Storage/Transport Temperature: Frozen.

Unacceptable Conditions: Specimens exposed to more than one freeze/thaw cycle.

Stability (collection to initiation of testing): Ambient: Unacceptable; Refrigerated: 1 week; Frozen: 2 weeks
Reference Interval:
Effective May 20, 2013
Age Reference Interval
10 years or less 37.0 - 117.0
11 years or greater 9.0 - 90.0

Interpretive Data:

See Compliance Statement B: www.aruplab.com/CS
Note: To evaluate inherited disorders of creatine metabolism or transport, please order Creatine Disorders Panel, Plasma or Serum (ARUP test code 2002328) and/or Creatine Disorders Panel, Urine (ARUP test code 2002333).
CPT Code(s): 82540