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HelpTest Code AIF Anti-Intrinsic Factor Antibody
Additional Codes
| Epic Ordering Code | LAB857 |
| NBS code | LBC13365 |
| Service code | 31618 |
Specimen Requirements
Submit only one of the following:
| Preferred: | Acceptable: |
| Yellow Top | Red Top |
Processing Requirements
Allow specimen to clot for 30 mins and centrifuge within 2 hours
Specimen type: Serum
Volume: 0.5mL
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | 8 hours |
| Refrigerate | 2 weeks (preferred) |
| Frozen | 1 month |
Specimen Condition
| Haemolysis | OK |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Methodology
Enzyme Immunoassay
Days and Times Performed
Monday, TAT 2 - 8 days
Reference Interval
No antibody detected: < 20 U/mL
Positive: ≥ 20 U/mL
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Autoantibodies against Intrinsic Factor are specific for pernicious anaemia (PA) but are not found in the serum of every patient with PA.
Update
Last updated 16/07/2026
LOINC Code Information
56539-0
Alias
AIF
Anti Intrinsic Factor Ab