Creatine Disorders Panel

Last Modified: 10/7/2020 10:03:03 AM

Medical Necessity Documentation:  
Client Notes: Patient History Form and this listed Clinical information is needed for appropriate interpretation.
Additional Clinical Information 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 or by contacting Client Services.
Patient Preparation:  
Specimen Requirements:

1.0 mL Plasma from a Green Top Tube - Li Heparin in a Plastic Vial

Collection Instructions: Mix by slowly inverting tube 8 to 10 times.
Separate from cells ASAP or within 2 hours of collection. 
Transfer 1 mL plasma to an Plastic Vial and freeze immediately.
Minimum Volume: 0.2 mL Plasma
Transport & Storage: Temperature/Stability: 1 week Refrigerated
2 weeks Frozen (preferred)
Rejection Criteria: Specimens exposed to more than one freeze/thaw cycle; Ambient Specimen
Reference Range: Refer to Interpretive Results
Critical Ranges:  
Test Comments:  
Methodology: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Clinical Significance: Initial test to diagnose or rule out creatine deficiency syndromes following clinical presentation. 
Documentation: Order Creatine Disorders Panel, Urine 2002333, simultaneously for proper result interpretation.

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.
Custom Panel: No


Turn Around Time: 2 to 9 days
Days Performed: Monday
Sites Performed: ARUP Lab
PHL Test Code: MSOT
EPIC Test Code:
Send Out Test Code: 2002328
Alternate Test Names: AGAT; Creatine Disorders Panel, Plasma or Serum ; GAA + Creatine; GAA and Creatine; GAMT; Guanidinoacetic Acid + Creatine; Guanidinoacetic Acid and Creatine
Included Tests: Creatine; Guanidinoacetic Acid
CPT Coding: 82540; 82542

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