Vitamin B12
Order Name
VIT B 12
Test Number: 4500900
Revision Date 06/04/2021
Test Number: 4500900
Revision Date 06/04/2021
| Test Name | Methodology | LOINC Code |
|---|---|---|
|
Vitamin B12
|
Chemiluminescence Assay | 2132-9 |
| SPECIMEN REQUIREMENTS | ||||
|---|---|---|---|---|
| Specimen | Specimen Volume (min) | Specimen Type | Specimen Container | Transport Environment |
| Preferred | 1 mL (0.5 mL) | Serum | Clot Activator SST | Refrigerated |
| Alternate 1 | 1 mL (0.5 mL) | Plasma | Lithium Heparin PST (Light Green Top) | Refrigerated |
| Instructions | Allow serum to clot fully, then separate serum and plasma within 2 hours of collection. Unacceptable: hemolyzed serum or plasma. Specimen stability: Ambient 3 days, Refrigerated 7 days, Frozen 1 month |
|||
| GENERAL INFORMATION | |
|---|---|
| Testing Schedule | Daily |
| Expected TAT | 1-3 days |
| Clinical Use | Useful in the investigation of macrocytic anemia and work-up of deficiencies seen in megaloblastic anemias. Also used for diagnosis and investigation of some neurological disorders. |
| CPT Code(s) | 82607 |
| Internal Comments | 9/20/17 updated SU - JK 3/8/18 updated temp to emph that "It would be preferred that specimen be frozen if not going to be tested within 48 hours of collection." - JK 7/20/18 added LI Hep as alternate - JK 6/20/19 update processing instructions [(RYAN HATLEY) -- 07/17/19 01:11:00 PM] 1. Please update Transport Environment to "Refrigerated" 2. Please remove from Instructions "It would be preferred that if testing is not going to be performed within 48 hours of collection that the serum or plasma aliquot be frozen for maximum stability." - JK |
| Lab Section | Chemistry |