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HelpTest Code A4AB Aquaporin-4 (AQP-4) Antibodies
Additional Codes
| Epic Ordering Code | LAB3041004 |
| NBS code | LBC02716 |
| Service code | 33310 |
Specimen Requirements
Submit the following:
| Container: |
| Red Top |
Processing Requirements
Allow specimen to clot for 30 mins and centrifuge within 2 hrs
Specimen type: Serum
Volume: 0.5 mL
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | 3 days |
| Refrigerate | 2 weeks (Preferred) |
| Frozen | 1 year |
Specimen Condition
| Haemolysis | OK |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Methodology
Immunofluorescence
Days and Times Performed
Alternate Tuesday, TAT 1 - 15 days
Reference Interval
Negative
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Neuromyelitis Optica (NMO) is an immune-mediated demyelinating disease of the central nervous system (CNS) characterized by optic neuritis and transverse myelitis. Presence of Aquaporin-4 antibodies is highly specific for NMO.
Update
Last updated 26/07/2026
LOINC Code Information
63439-4
Alias
AQP4
Aquaporin
Devic's Antibody
NMO (Neuromyelitis Optica)
NMO-IgG
Optic Neuritis Antibody