VITAMIN B12

Mnemonic

B12

Specimen Collection Requirements

Collect

Serum, one 5.0 mL gold (SST) or 7.0 mL red top tube

Handling

Allow serum to clot completely at room temperature (minimum: 30 minutes). Centrifuge and separate serum from cells within 2 hours of collection.

Preferred Volume

1.0 mL

Minimum Volume

0.5 mL

Transport

Frozen (at or below -20°C)

Rejection Criteria

Grossly hemolyzed specimens, plasma

Stability

AFTER SEPARATION FROM CELLS: Ambient (20-25°C): 2 hours; Refrigerated (2-8°C): 24 hours if left on original SST; 48 hours if aliquoted; Frozen (at or below -20°C): 2 months; Protect from > 4 hours of light exposure.

Testing Information

Performed

Sun - Fri

Method

Chemiluminescent Immunoassay

Referral Lab

Samaritan Health Services Laboratories

Reference Values

Reference Values

Normal Range: 211-946 pg/mL
Indeterminate Range: 145-180 pg/mL
Deficient Range: Less than 145 pg/mL

CPT Codes

82607

Last Updated: Monday, February 20, 2017 01:03:26 PM