Analytic Time

3 - 7 days

MiChart Code
Myasthenia Gravis (MG) Eval, Adult (Inactive)
Soft Order Code

Test Updated:


MG Evaluation, Adult
Neuronal (V-G) K Channel Antibody (reflex)
ACh Receptor (Muscle) Binding Antibody
ACh Receptor (Muscle) Modulating Antibody
Striational (Striated Muscle) Antibody
AChR Ganglionic Neuronal Antibody (reflex)
CRMP-5 IgG (reflex)
AChR Antibodies
Acetylcholine Receptor Antibodies
CRMP-5-IgG Western Blot, S
AChR Ganglionic Neuronal Ab, S
GAD65 Antibody (reflex)
Neuronal (V-G) K+ Channel Ab

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Test Overview

Test Methodology
Test Usage

Recommended for initial investigation of: 1) a patient aged 20 or older with symptoms and signs of acquired MG; 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 Onsite

Collect specimen in a red top tube.

Collection Offsite

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

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

Billing Information

CPT Code
83519 x2, 83520
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.