Test Overview
Test Methodology

Gas Chromatography/Mass Spectrometry (GC/MS)

Test Usage

Diagnosis of suspected organic acidurias.

Reference Range *

Interpretive report provided.

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

Test Limitations

Many organic acidurias are episodic; the optimal time to evaluate is during the symptomatic period.

Test Details
Days Set Up
Monday - Friday
Analytic Time

5 - 10 days; contact MLabs Client Services Center or Pediatric Geneticist on Call if assay is needed on an urgent basis.

Soft Order Code
ORA
MiChart Code
Orotic Acid, Qualitative, Urine (MMGL)
Synonyms
    Laboratory
    Chemical Pathology
    Section
    Special Chemistry
    STAT Availability

    STAT analysis must be approved by Pediatric Geneticist on Call.

    STAT Limitations

    6 Hours post approval for STAT result.

    Specimen Requirements
    Collection

    Collect random urine specimen and freeze. Freeze each specimen immediately after collection if multiple collections are needed to reach the minimum volume. Include the patient’s family history, clinical condition (asymptomatic or acute), diet, and a list of current medications with the test requisition.

    Normal Volume
    10 mL random urine
    Minimum Volume
    5 mL random urine
    Additional Information

    Test may include medical geneticist interpretation of results at an additional charge. By ordering this test, the clinician acknowledges that a physician interpretation will be performed and billed as a separate additional charge if indicated.

    Billing
    CPT Code
    83789
    Fee Code
    23793
    NY State Approved
    No