Update Type: Test Methodology Changed
Test Updated: 12/14/2022
Test Overview
Test Methodology

Indirect Immunofluorescent assay, RIA, Western blot, Cell Binding assay

Test Usage

Evaluating new onset encephalopathy (noninfectious or metabolic) comprising confusional states, psychosis, delirium, memory loss, hallucinations, movement disorders, sensory or motor complaints, seizures, dyssomnias, ataxias, nausea, vomiting, inappropriate antidiuresis, coma, dysautonomias, or hypoventilation in serum specimens

Reference Range *

By report

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

Test Details
Days Set Up
Monday - Sunday; reflex tests varies
Analytic Time

11 - 14 days

Soft Order Code
Reference Laboratory
Mayo (ENS2)
Special Testing
Specimen Requirements
Collection Instructions

Collect specimen in red top or SST tube. Spin and aliquot into a screw capped plastic tube. Send to Specimen processing refrigerated.

Normal Volume
4 mL serum
Minimum Volume
2.5 mL serum
CPT Code
83519 x 5, 86255 x 14, 86341 If reflexes added: 84182 and/or 86255 and/or 86256