Posted Date
Effective Date
Update Type New Tests
CPT Code 83519, 86255
Order Code MGMR
Referral Laboratory Mayo Medical Laboratories



MG Evaluation MuSK Reflex, S

Order Code:                             MGMR

CPT Code:                               83519, 86255

Referral Laboratory:                Mayo Medical Laboratories


Collection Instructions: Collect 6 mL of whole blood in a red top vacutainer. Centrifuge and aliquot the serum into a plastic vial and ship refrigerated.


Methodology: Radioimmunoassay (RIA), Enzyme Immunoassay (EIA), Western Blot


Test Analysis: M-F, turnaround time 3-7 days


Reference Range: 


Reference Value


Acetylcholine Receptor (Muscle) Binding Antibody

≤0.02 nmol/L

Acetylcholine Receptor (Muscle) Modulating Binding Antibody

(reported as __% loss of AChR)  0%-20%

Striational (Striated Muscle) Antibodies


Muscle - Specific Kinase (MuSK) Antibody

≤0.02 nmol/L

Glumatmic Acid Decarboxylase (GAD65) Antibody Assay

≤0.02 nmol/L

Collapsin Response-Mediator Protein-5-IgG(CRMP-5-IgG) Western Blot


Ganglionic Acetylcholine Receptor (ALPHA3) Autoantibodies

≤0.02 nmol/L

Neuronal Voltage-gated Potassium Channel (VGKC) Autoantibody

≤0.02 nmol/L