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Test Code NBLD0041 Organic Acids Screen, Urine

Additional Codes

Mayo Test Code: OAU

Useful For

Diagnosis of inborn errors of metabolism

Testing Algorithm

The following algorithms are available in Special Instructions:

-Newborn Screening Follow-up for Elevations of C8, C6, and C10 Acylcarnitines (also applies to any plasma or serum C8, C6, and C10 acylcarnitine elevations)

-Newborn Screening Follow-up for Isolated C4 Acylcarnitine Elevations (also applies to any plasma or serum C4 acylcarnitine elevation)

-Newborn Screening Follow-up for Isolated C5 Acylcarnitine Elevations (also applies to any plasma or serum C5 acylcarnitine elevation)

-Porphyria (Acute) Testing Algorithm

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type


Necessary Information

1. Patient's age is required.

2. Include family history, clinical condition (asymptomatic or acute episode), diet, and drug therapy information.

Specimen Required

Supplies: Urine Tubes, 10 mL (T068)

Specimen Volume: 10 mL

Pediatric: If insufficient collection volume, submit as much specimen as possible in a single container; the laboratory will determine if volume is sufficient for testing.

Collection Instructions:

1. Collect a random urine specimen.

2. No preservative.

Specimen Minimum Volume

4 mL

Specimen Stability Information

Specimen Type Temperature Time
Urine Frozen (preferred) 416 days
  Refrigerated  14 days

Reference Values

An interpretive report will be provided.

Day(s) and Time(s) Performed

Monday through Saturday; 7 a.m.

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information


Reject Due To









Method Name

Gas Chromatography-Mass Spectrometry (GC-MS)