Days Set Up
Analytic Time

11 - 20 days

MiChart Code
Creatine Disorders Panel, Urine
Soft Order Code

Test Updated:


Looking to order a test?

We’ve provided helpful links to make ordering easy.

Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

Learn about how to properly label and where to ship specimens.

Order Kits and Supplies

MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

Visit our provider FAQ and learn about common questions to ordering tests.

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.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Offsite

Collect random urine specimen with no preservative. Aliquot 1 mL into a plastic urine container and freeze immediately.

100ml Plastic Specimen Container
Normal Volume
1 mL aliquot of random urine collection
Minimum Volume
0.5 mL aliquot of random urine collection

Billing Information

CPT Code
82540, 82570, 83789
Pro Fee Code

Have More Questions?

Explore our helpful billing resources:

Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.