Methylmalonic Acid Blood
Test Mnemonic
MMA
CPT Codes
- 83921 - QTY (1)
LOINC ®
13964-2
Aliases
- MMA, Blood
Performing Laboratory
Cleveland Clinic Laboratories
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 2 mL | Plasma | Lithium heparin PST (Lt. Green) | Refrigerated | Centrifuge and transfer plasma to a clean, tightly sealed tube within 2 hours of collection. Refrigerate within 24 hours. |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 2 mL | Plasma | Sodium heparin (Green) | Refrigerated | Centrifuge and transfer plasma to a clean, tightly sealed tube within 2 hours of collection. Refrigerate within 24 hours. | |
| 2 mL | Serum | No additive (Red) | Refrigerated | Centrifuge and transfer serum to a clean, tightly sealed tube within 2 hours of collection. Refrigerate within 24 hours. | |
| 2 mL | Serum | SST (Gold) | Refrigerated | Centrifuge and transfer serum to a clean, tightly sealed tube within 2 hours of collection. Refrigerate within 24 hours. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.7 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | 48 Hours |
| Refrigerated | 14 Days |
| Frozen | 6 Months |
Days Performed
Mon - Fri
Turnaround Time
1 - 6 days
Methodology
| Name | Description |
|---|---|
| High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS) |
Special Info
Patients should not have already received Vitamin B12 replacement therapy.
Clinical Info
Confirmation of vitamin B12 deficiency when vitamin levels are equivocal