Test Code LAB4931 VITAMIN B12 WITH REFLEX TO METHYLMALONIC ACID (MMAS)
Additional Codes
Internal / Beaker: LAB4931
External: B12RFLXMMA
PERFORMED AT
SBH LABORATORY
Specimen Requirements
Container Type: Serum Separator (Gold Top)
Specimen Type: Serum
Preferred Volume: 2.5 mL
Emergency Minimum Volume: 0.8 mL
Specimen Processing: Separate serum or plasma from cells as soon as possible by centrifugation. Aliquot serum or plasma into a separate tube if parent tube does not have a gel barrier. Store and transport refrigerated; or if it'll be greater than 24 hours to the lab, store and transport frozen. One freeze/thaw acceptable.
Unacceptable Conditions: Grossly Hemolyzed specimens (MMA)
Limitations: Samples should not be taken from patients receiving therapy with high biotin doses (i.e. >5 mg/day) until at least 8 hours following the last biotin administration.
Alternate Specimens: Plain Serum Tube (Red Top)
Stability:
Temperature | Time |
---|---|
Room Temp | 2 hours |
Refrigerated | 24 hours |
Frozen (-20 øC) | 8 weeks |
Method
CLIA
Synonyms
Vit B12, B12, Cobalamin, Vitamin B-12, B-12 LEVEL, MMA, Methylmalonic acid, MMAS
CPT Codes
83921
Department
Chemistry
Test Schedule
Daily
Additional Test Information
A B12 result of < 500 pg/mL (0-499) will automatically reflex LAB835 – Methylmalonic Acid, Serum