Test ID: ZG097
Component(s): Z0351 Intrinsic Factor Abs, Serum LOINC: 31443-5
CPT code: 86340
LOINC:
Specimen Type: Red or SST
Frequency: 2 – 4 days
Instructions: 2 mL Serum from Red or SST, Refrigerated. Min 1 mL.
Text: Intrinsic factor is produced by the parietal cells of the stomach & is required for the absorption of vitamin B12 from the diet. During digestion, stomach acids dissociate B12 from food & intrinsic factor binds to it & allows it to be absorbed in the small intestine. Conditions that impair intrinsic factor production lead to B12 malabsorption & deficiency.
Methodology: Immunochemiluminometric assay (ICMA)