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Laboratory Test Directory

Creatine Disorders Panel, Serum or Plasma (Updated)

Components

Name Method Department Units
Creatine Disorders Panel, Serum or Plasma Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
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Creatine, Serum/Plasma, Guanidinoacetic Acid

Specimen Requirements

Plasma Spun, Serum Spun

Container Type Container Size Specimen Volume
Preferred

Red tube, (no anticoagulant), No Gel

3 mL 1 mL
Alternate

Purple tube (EDTA)

3 mL 1 mL
Alternate

Green tube (Sodium heparin), No Gel

3 mL 1 mL
Alternate

Green tube (Lithium heparin), No Gel

3 mL 1 mL
Alternate

Green tube (Lithium heparin), with Gel

3 mL 1 mL
Alternate

Gold tube, (SST) with Gel

3.5 mL 1 mL
Alternate

Red Tube (no anticoagulant) with Gel

3 mL 1 mL
Stability

Refrigerated - 1 week(s)
Frozen - 2 week(s)

Specimen Preparation

  • Centrifuge within 2 hours, separate supernatant and freeze

Reasons for Rejection

  • Not received at proper temperature

Comments

Initial test to diagnose or rule out creatine deficiency syndromes following clinical presentation. Order Creatine Disorders Panel, Urine (2002333), simultaneously for proper result interpretation. 

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, see link below.

CPT Code

  • 82540
  • 83789