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Myasthenia Gravis Panel 3

Test Code


CPT Code(s)

83519 (x3), 86255


Acetylcholine Receptor Binding Antibody, Acetylcholine Receptor Blocking Antibody, Acetylcholine Receptor Modulating Antibody, Striated Muscle Antibody with Reflex to Titer

If Striated Muscle Antibody Screen is positive, Striated Muscle Antibody Titer will be performed at an additional charge (CPT code(s): 86256).

Preferred Specimen(s)

2 mL serum

Minimum Volume

0.8 mL

Transport Container

Plastic screw-cap vial

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 4 days
Refrigerated: 14 days
Frozen: 30 days


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Performing Laboratory

Quest Diagnostics Nichols Institute-San Juan Capistrano, CA
33608 Ortega Highway
San Juan Capistrano, CA 92675-2042

Reference Range(s)

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Clinical Significance

Myasthenia Gravis is a neurological disorder characterized by a decrease in acetylcholine receptors. Patients exhibit skeletal muscle weakness and fatigability. Approximately 80% of patients with Myasthenia Gravis, excluding ocular involvement only, have detectable acetylcholine receptor antibody. There is a strong correlation between the presence of striated muscle antibody and the presence of thymoma.

Alternative Name(s)

Acetylcholine Receptor Binding Antibody

LOINC®' Code(s)

The Result and LOINC information listed below should not be used for electronic interface maintenance with Quest Diagnostics. Please contact the Quest Diagnostics Connectivity Help Desk for more information at 800-697-9302.

NOTE: The codes listed in the table below are not orderable Test Codes.

Result NameLOINC CodeComponent Name
85985980ACETYLCHOLINE RECEPTOR BINDING ANTIBODY11034-6Acetylcholine receptor binding Ab
85987490ACETYLCHOLINE RECEPTOR MODULATING ANTIBODY11562-6Acetylcholine receptor modulation Ab
85987480ACETYLCHOLINE RECEPTOR BLOCKING ANTIBODY11561-8Acetylcholine receptor blocking Ab
85991117STRIATED MUSCLE AB TITER5372-8Striated muscle Ab
45040100STRIATED MUSCLE AB SCREEN13931-1Striated muscle Ab

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

LOINC assignment is based on a combination of test attributes, including the method used by the performing laboratory. For tests not performed by Quest Diagnostics, codes are assigned by the performing laboratory.

* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.