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HelpTest Code MMAU Methylmalonic Acid, Quantitative, Urine
Reporting Name
Methylmalonic Acid, QN, UUseful 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
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
UrineSpecimen 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.
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 |
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Reference Values
<3.60 mmol/mol creatinine
Day(s) Performed
Monday through Friday
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
83921
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| MMAU | Methylmalonic Acid, QN, U | 25116-5 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 80290 | Methylmalonic Acid, QN, U | 25116-5 |
Report Available
3 to 5 daysForms
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)