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HelpTest ID BLOD1575 Vitamin B12 Reflex to Methylmalonic Acid
Synonym
B12, Cyanocobalamin
Specimen Type/Requirements
Gold top (Serum w/gel) tube - Serum (preferred)
Red top (Serum w/out gel) tube - Serum
Light green is not acceptable for the reflex to MMA.
Specimen should be centrifuged and separated within 2 hours of collection.
Test may be affected by gross hemolysis, gross icterus and gross lipemia.
Specimen Volume
| Preferred Volume | 1.5 mL |
|---|---|
| Minimum Volume | 1.0 mL |
Stability/Transport
| Room Temperature | 3 days | |
|---|---|---|
| Refrigerated | 7 days | Preferred for transport |
| Frozen | Greater than 7 days |
Performed Test Frequency
Monday through Sunday
Report Available
1 - 3 days
Additional Information
This test will reflex to Methylmalonic Acid (BLOD0103) at an additional cost if Vitamin B12 is <300 pg/mL.
Methodology
B12: Chemiluminescent Microparticle Immunoassay (CMIA)
MMA: Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
Performing Lab
Sanford Laboratories Sioux Falls, Fargo, Bismarck, Bemidji, Black Hills
CPT
82607, 83921 (if reflex to Methylmalonic Acid)