Sign in →

Test Code 1984 Vitamin B12, Plasma

Performing Laboratory

Barnes-Jewish Hospital Laboratory


Cobas ECLIA electrochemiluminescence

Literature References:

Package insert: Vitamin B12. Roche Corporation 03/2015.

Specimen Requirements

Patient Preparation:

Fasting specimen is recommended.


Specimen Type: Plasma

Container/Tube: Mint-green top (lithium heparin)

Specimen Volume: Full tube


Day(s) Test Set Up

Monday through Sunday

Turnaround Time:
STAT: not available
Routine: results available 2-4 hours of receipt

Reference Values

230-1250 pg/mL

Literature Reference:

Tietz Fundamentals of Clinical Chemistry, 5th Edition, Editors: Burtis CA and Ashwood ER, Chapter 31, p. 920. W.B. Saunders Company, 2014

Test Classification and CPT Coding


Additional Information

For BJH Laboratory Use Only

Alternate Tube(s):

1 plain, red-top tube
Analyte Stability:

See Analyte Stability Chart in Special Instructions.

Laboratory Processing Instructions:

Test performed in BJH Core Lab.  Processed by automated line for delivery to the Cobas 8000. Completed specimens are stored refrigerated for 5 days.

Specimen Transport Temperature


Special Instructions

LOINC Code Information

Name LOINC Code
Vitamin B12, Plasma 2132-9