Analytic Time

3 - 7 days

Soft Order Code

Update Type: Test Resumed

Test Updated: 09/02/2020


ACh Receptor (Muscle) Binding Antibody
ACh Receptor (Muscle) Modulating Antibody
AChR Ganglionic Neuronal Antibody
Striational (Striated Muscle) Antibody
AChR Antibodies
Acetylcholine Receptor Antibodies
GAD65 Antibody
Neuronal (V-G) K Channel Antibody

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Test Overview

Test Methodology
Test Usage

Recommended for investigation of: 1) a patient with suspected or proven thymoma, whether or not symptoms or signs of MG are present (also of value for serially monitoring patients after removal of thymoma; a rising autoantibody titer may herald tumor persistence or recurrence), or emergence of an unrelated neoplasm and 2) a bone marrow transplant recipient with suspected graft-vs.-host disease, particularly if there is evidence of weakness.

Reference Range

Muscle AChR Binding Ab: <=0.02 nmol/L; Muscle AChR Modulating Ab: 0 - 20%; Striational Ab: <1:120; CRMP-5-IgG Western Blot: Negative; AChR Ganglionic Neuronal Ab: <=0.02 nmol/L; Glutamic Acid Decarboxylase Ab: <=0.02 nmol/L; Voltage-Gated Potassium Channel Ab: <=0.02 nmol/L.

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

Specimen Requirements

Collection Offsite

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

Yellow Top Tube
Normal Volume
3 mL serum
Minimum Volume
2 mL serum

Billing Information

CPT Code
83519 x4, 83520, 84182, 86341
Pro Fee Code

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.