Test Details

Mnemonic

DLAU

Ordering Code

3800338

CPT-4 Code(s)

83605

Specimen Information

Patient Preparation

Biochemical Genetics Patient Information form required.

Collect

Random urine

Specimen Preparation

Send 0.5 mL urine in a screw capped plastic urine cup. No preservative.
Frozen.

Alternate Specimen

24 hour urine

Minimum Volume

0.15 mL

Transport Temperature

Frozen

Rejection Criteria

Urine collected with preservative

Stability

Room temperature: 90 days
Refrigerated: 90 days
Frozen: 90 days

Methodology

Gas Chromatography-Mass Spectrometry (GCMS) Stable Isotope Dilution Analysis
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Reference Range

0.0 - 0.25 mmol/L
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Performing Laboratory

Mayo Clinic Laboratories
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New York DOH Approval Status

No
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