Test Overview
Test Methodology

Competitive Binding Immunoenzymatic Assay

Test Usage

Positive in 50% of persons with pernicious anemia.

Reference Range *

Negative (reported as positive, negative, or indeterminate).

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Monday - Friday
Analytic Time

2 - 5 days

Soft Order Code
IFBA
MiChart Code
Intrinsic Factor Blocking Antibody
Synonyms
  • INTRINSIC FACTOR BLOCKING AB
  • IFB AB
  • IFBA TEXT
  • IFBA COMMENTS
Laboratory
Sendout
Reference Laboratory
Mayo IFBA (9335)
Section
Special Testing
Specimen Requirements
Collection Instructions

Collect specimen in a red top or SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate (preferred) or freeze.

Contraindications
This test should not be ordered on patients who have received a radioisotope (either diagnostically or therapeutically) or a vitamin B(12) injection within the previous week.
Yellow Top Tube
Normal Volume
1 mL serum
Minimum Volume
0.5 mL serum
Additional Information

Test sent to Mayo Medical Laboratories.

Billing
CPT Code
86340
Fee Code
20430
LOINC
31444-3
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