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HelpTest Code MMAU Methylmalonic Acid, Quantitative, Urine
Specimen Required
Patient Preparation: Overnight fast required
Supplies: Urine Tubes, 10 mL (T068)
Container/Tube: Plastic, 10-mL urine tube
Specimen Volume: 4 mL
Collection Instructions: Collect second-voided specimen after an overnight fast.
Children's Mercy Hospital
Note:
CMH COLLECTION: 5 mL in sterile cup
Specimen Minimum Volume
1.2 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Frozen (preferred) | 28 days | |
| Refrigerated | 28 days | ||
| Ambient | 21 days |
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
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Day(s) Performed
Monday through Friday
Report Available
3 to 5 daysReporting Name
Methylmalonic Acid, QN, UReference Values
<3.60 mmol/mol creatinine
Method Name
Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
Performing Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
83921