Test Code OROT Orotic Acid, Random, Urine
Reporting Name
Orotic Acid, UUseful For
Evaluation of the differential diagnosis of hyperammonemia and hereditary orotic aciduria
Sensitive indicator of ornithine transcarbamylase (OTC) activity after administration of allopurinol or a protein load to identify OTC carriers
Method Name
Colorimetric
Performing Laboratory

Specimen Type
UrineNecessary Information
1. Patient's age is required.
2. Provide a reason for referral.
Specimen Required
Supplies: Urine Tubes, 10 mL (T068)
Container/Tube: Plastic, 10-mL urine tube
Specimen Volume: 10 mL
Collection Instructions:
1. Collect a random or timed urine specimen.
2. No preservative.
Specimen Minimum Volume
3 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Urine | Frozen | 30 days |
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability. |
Special Instructions
Reference Values
<2 weeks: 1.4-5.3 mmol/mol creatinine
2 weeks-1 year: 1.0-3.2 mmol/mol creatinine
2-10 years: 0.5-3.3 mmol/mol creatinine
≥11 years: 0.4-1.2 mmol/mol creatinine
Day(s) and Time(s) Performed
Wednesday; 8 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
83921
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
OROT | Orotic Acid, U | 17869-9 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
8905 | Orotic Acid, U | 17869-9 |
Forms
1. Biochemical Genetics Patient Information (T602) in Special Instructions.
2. If not ordering electronically, complete, print, and send an Inborn Errors of Metabolism Test Request (T798) with the specimen.