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HelpOrderable Name MMAU Methylmalonic Acid, Quantitative, Urine
Useful For
Evaluating children with signs and symptoms of methylmalonic acidemia using urine specimens
Evaluating individuals with signs and symptoms associated with a variety of causes of vitamin B12 (cobalamin) deficiency
Specimen Type
UrineSpecimen Required
Patient Preparation:
Fasting: 8 hours, required
Supplies: Urine Tubes, 10 mL (T068)
Container/Tube: Plastic, 10-mL urine tube
Specimen Volume: 4 mL
Collection Instructions:
1. After fasting at least 8 hours overnight, patient should void first-morning urine as normal. Do not collect.
2. Patient should continue to fast and then collect the next (second morning) urine voided.
Specimen Minimum Volume
1.2 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Frozen (preferred) | 28 days |
| Refrigerated | 28 days | |
| Ambient | 21 days |
Reference Values
<3.60 mmol/mol creatinine
Day(s) Performed
Monday through Friday
CPT Code Information
83921
Report Available
3 to 5 daysReject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Method Name
Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
Forms
If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
-Biochemical Genetics Test Request (T798)
-Benign Hematology Test Request (T755)