Epic Code LAB1231996 Creatine Biosynthesis Disorders Panel, Urine

Test Name Alias

LAB1231241 | BIOSYNTH | Quest: 94600

Interface Order Alias

1231996

Clinical Information

Note: Includes Guanidinoacetate, Creatine, Creatinine, Creatine/Creatinine

Specimen Requirements

Specimen Collection Criteria

Collect (preferred specimen): Random 1.0 mL urine specimen in a sterile screw-capped container (preferred) or other sterile collection cup. (Minimum: 0.5 mL)

Send specimen for processing immediately after collection.

Physician Office/Draw Specimen Preparation

Freeze (-20°C/-4°F or below) immediately.

In-Lab Processing

Freeze (-20°C/-4°F or below) immediately.

Specimen Transport Temperature

Transport: 1.0 mL random urine, frozen (-20°C/-4°F or below). (Minimum: 0.15 mL)

Rejection Criteria

Specimen not frozen immediately after collection.
Specimens not collected and processed as indicated.

Specimen Stability

Specimen Stability for Testing:
Room Temperature (20-26°C or 68-78.8°F): Unacceptable
Refrigerated (2-8°C or 36-46°F): Unacceptable
Frozen (-20°C/-4°F or below): 28 days

Specimen Storage in Department Prior to Disposal:
Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Test Frequency

Performed: Tuesday..
Results are available in 4-7 days.

Reference Range

By report

Performing Department

Send Outs

Performing Department Laboratory Location

Sent to Quest Diagnostics- Wood Dale, IL

Methodology

Liquid Chromatography / Tandem Mass Spectrometry (LC/MS/MS).

CPT

82540, 82542, 82570

LOINC

Unavailable

Reviewed Date

11/8/2025

Orderable Regions