Summary & Overview
CPT 86041: Acetylcholine Receptor Binding Antibody Test
CPT code 86041 describes laboratory testing for acetylcholine receptor (AChR) binding antibodies, commonly performed using radioimmunoassay. This serologic test aids in diagnosing myasthenia gravis (MG), an autoimmune neuromuscular disorder characterized by fluctuating muscle weakness. Nationally, AChR antibody testing is a key diagnostic tool for neurologists, immunologists, and clinical laboratories in confirming suspected MG and guiding subsequent management.
Key payers covered in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for CPT code 86041, typical service settings, and what to expect in payer coverage discussions. The publication outlines common modifiers associated with laboratory services and identifies where data are not available in the input.
This summary prepares clinicians, billing professionals, and policy analysts to understand the code's clinical purpose, where the test is typically performed, and which national payers are commonly involved. The full publication includes benchmarks, payer policy overviews, and clinical background relevant to coding and reimbursement for AChR antibody testing.
Billing Code Overview
CPT code 86041 evaluates a patient specimen (for example, serum) for acetylcholine receptor (AChR) binding antibody using techniques such as radioimmunoassay. The measured antibody level is used as a noninfectious serologic test that may indicate myasthenia gravis (MG), an autoimmune disorder affecting the neuromuscular junction and causing muscle weakness.
Service type: Immunology / Serology testing
Typical site of service: Clinical laboratory or hospital laboratory
Clinical & Coding Specifications
Clinical Context
A 48-year-old patient presents to a neurology clinic with progressive fluctuating skeletal muscle weakness, ptosis, and diplopia over several weeks. The neurologist performs a focused neuromuscular evaluation and suspects myasthenia gravis (MG). A serum sample is collected in the outpatient phlebotomy area and sent to the clinical laboratory for serologic testing. The laboratory performs an acetylcholine receptor (AChR) binding antibody assay using a radioimmunoassay technique to quantify AChR-binding antibodies. Results are reported to the ordering neurologist; a markedly elevated AChR binding antibody level supports the diagnosis of MG and informs further management, which may include electromyography, chest imaging for thymoma, or initiation of immunotherapy. Typical site of service includes outpatient clinic, ambulatory phlebotomy center, or hospital outpatient laboratory. Service type is diagnostic serologic testing (immunology/autoantibody assay).
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Default/No modifier | Use when no specific modifier applies to the laboratory service |
26 | Professional component | Use when billing only the professional interpretation component of a test (rare for automated serology) |