Acetylcholine Receptor Modulating Antibody

Myasthenia Gravis (MG), AChR modulating antibody

Test Codes

EPIC: LAB1231928, Beaker: ACHR MOD AB, Quest: 26474

Department

Send Outs

Specimen Collection Criteria

Collect (preferred specimen): One Gold-top SST tube. (Minimum 5.0 mL)
Also acceptable: One plain Red-top tube.

Physician Office/Draw Specimen Preparation

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transfer serum to a plastic transport tube and keep at room temperature (20-26°C or 68-78.8°F).

Preparation for Courier Transport

Transport: 1.0 mL serum, maintain at room temperature (20-26°C or 68-78.8°F). (Minimum: 0.5 mL)

Rejection Criteria

• Plasma
• Gross hemolysis.
• Grossly lipemic.
• Microbially contaminated.
• Specimens not collected and processed as indicated.

In-Lab Processing

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transfer serum to a plastic transport tube and keep at room temperature (20-26°C or 68-78.8°F).

Transport: 1.0 mL serum, maintain at room temperature (20-26°C or 68-78.8°F). (Minimum: 0.5 mL)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 14 days
Refrigerated (2-8°C or 36-46°F): 14 days
Frozen (-20°C/-4°F or below): 30 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to Quest Diagnostics, Wood Dale, IL.

Performed

Sunday, Tuesday, Thursday.
Results available in 4-8 days.

Reference Range

<32% Inhibition

Test Methodology

Radiobinding Assay (RBA).

Clinical Utility

CPT Codes

86043

Contacts

Last Updated

11/19/2025