Test Overview
Test Methodology
Liquid Chromatography - Tandem Mass Spectrometry (LC-MS/MS) Stable Isotope Dilution Analysis
Test Usage
This test is useful for the evaluation of patients with a clinical suspicion of inborn errors of creatine metabolism, including arginine:glycine amidinotransferase (AGAT) deficiency, guanidinoacetate methyltransferase (GAMT) deficiency and cellular transport (CrT1) defects.
Reference Range *
Interpretive report provided.
Test Details
Days Set Up
Tuesday
Analytic Time
11 - 20 days
Soft Order Code
CRDPU
MiChart Code
Creatine Disorders Panel, Urine
Laboratory
Sendout
Reference Laboratory
Mayo CRDPU (88697)
Section
Special Testing
Specimen Requirements
Collection Instructions
Collect random urine specimen with no preservative. Aliquot 1 mL into a plastic urine container and freeze immediately.
Normal Volume
1 mL aliquot of random urine collection
Minimum Volume
0.5 mL aliquot of random urine collection
Additional Information
Panel includes creatine, creatinine, guanidinoacetic acid (GAA), and creatine/creatinine ratio. Test sent to Mayo Medical Laboratories.
Billing
CPT Code
82540, 82570, 83789
Fee Code
20320, AA180, AA181
NY State Approved
No