Laboratory Services
Vitamin B12
Print this pageUpdated Test Information:
| Test Description |
Vitamin B12
|
|
|---|---|---|
| Synonym(s) |
B12, Cobalamin |
|
| Test ID |
B12
|
|
| General Information |
Vitamin B12 determinations should be performed on serum or plasma samples from fasting patients. |
|
| Specimen Type |
Serum |
|
| Specimen Requirements |
SST |
|
| Alternate Specimen Type |
Na‑heparin, Li‑heparin, K2‑EDTA and K3‑EDTA plasma |
|
| Specimen Collection / Processing Instructions |
SST - Samples should not be taken from patients receiving therapy with high biotin doses (i.e.greater than 5 mg/day) until at least 8 hours following the last biotin administration. Transfer separated serum or plasma to an aliquot tube |
|
| Minimum Sample Volume |
1 mL |
|
| Pediatric Min. Volume (if applicable) |
500 uL |
|
| Additional Processing Details |
Centrifuge and aliquot serum/plasma from cells within 45 minutes of collection |
|
| Stability |
2 hours at 15‑25 °C, 48 hours at 2‑8 °C, 56 days at ‑20 °C (± 5 °C). |
|
| Unacceptable Specimen Conditions |
Hemolyzed samples |
|
| Methodology |
Electrochemiluminescence immunoassay ECLIA |
|
| Estimated TAT |
0-2 days |
|
| Testing Schedule |
Monday-Saturday |
|
| CPT Code(s) |
82607 |
|
| Reference Range |
232-1245 pg/mL |
|
| Performing Lab |
Incyte Diagnostics |
|
| LOINC Code(s) |
2132-9 |
