Creatine Disorders Panel, Plasma or Serum
2002328
Ordering Recommendation
Initial test to diagnose or rule out creatine deficiency syndromes following clinical presentation. Order Creatine Disorders Panel, Urine (2002333), simultaneously for proper result interpretation.
Mnemonic
CRTN DIS P
Methodology
Liquid Chromatography/Tandem Mass Spectrometry
Performed
Mon
Reported
2-9 days  
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
  
Collect
Green (sodium or lithium heparin), lavender (EDTA), plain red, or serum separator tube.  
Specimen Preparation
Separate 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.  
Remarks
Clinical information is needed for appropriate interpretation. Additional required information includes age, gender, diet (e.g., TPN therapy), drug therapy, and family history. Biochemical Genetics Patient History Form is available on the ARUP Web site at http://www.aruplab.com/patienthistory or by contacting ARUP Client Services.  
Stability
Ambient: Unacceptable; Refrigerated: 1 week; Frozen: 2 weeks  
Reference Interval
 
 
Available Separately Components Reference Interval
 Creatine, Plasma By report
 Guanidinoacetic Acid,  Plasma By report
Interpretive Data


See Compliance Statement B: www.aruplab.com/CS
Statement B: This test was developed and its performance characteristics determined by ARUP Laboratories. The U.S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.
 
Note
 
CPT Code(s)
82540; 83789
Components
Component Test Code*Component Chart Name
2002330Guanidinoacetic acid, Plasma
2002331Creatine, Plasma
2002332Creatine Disorder Plasma Interpretation
* 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 click the sidebar link to access the Interface Map.
Aliases
  • AGAT
  • Creatine, Plasma
  • Creatinine, plasma
  • GAA & Creatine
  • GAA + Creatine
  • GAMT
  • Guanidinoacetic Acid and Creatine
  • Guanidinoacetic Acid + Creatine
  • Guanidinoacetic acid, plasma