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VITAMIN B12

Mnemonic

B12

Specimen Collection Requirements

Collect

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

Supply Item Number - 101235 or 101192

Handling

Allow serum tubes to clot completely at room temperature (minimum - SST: 30 minutes, red top tubes: 60 minutes). Centrifuge and separate serum from cells within 2 hours of collection.

Preferred Volume

1.0 mL

Minimum Volume

0.5 mL Serum, (Whole Blood 1.3 mL minimum draw)

Transport

Frozen (at or below -20°C)

Rejection Criteria

Grossly hemolyzed specimens, plasma

Stability

AFTER SEPARATION FROM CELLS: Room Temperature (20-25°C): 8 hours; Refrigerated (2-8°C): 3 days; Frozen (at or below -20°C): 2 months

Testing Information

Performed

Mon - Fri and a single run on the weekend

Reported

24-48 hours

Method

Chemiluminescent Immunoassay

Reference Values

Reference Values

Normal Range:            180-914 pg/mL
Indeterminate Range:   145-180 pg/mL
Deficient Range:          Less than 145 pg/mL

CPT Codes

82607

Last Updated: Thursday, December 7, 2017 06:31:11 AM


Client Services: 503-413-1234