Summary & Overview
CPT 86593: Syphilis Antibody Serology Test
CPT code 86593 denotes a laboratory serologic assay that evaluates the level of syphilis-related antibodies in patient specimens. As a targeted diagnostic test for Treponema pallidum exposure, this code supports clinical decision-making for screening, diagnosis, and monitoring of syphilis and has implications for public health surveillance and sexually transmitted infection management nationwide. Payers commonly involved in coverage of this laboratory service include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
This publication provides a concise overview of clinical context for CPT code 86593, expected sites of service, and the types of benchmarks and policy considerations readers can expect to find, including reimbursement benchmarks, common billing and coding considerations, and payer coverage patterns. The report also highlights relevant clinical applications—screening, confirmatory testing, and monitoring response to therapy—and situates the test within common laboratory workflows. Data not provided in the input are noted where applicable. Readers will gain a clear understanding of what CPT code 86593 represents, which payers are typically relevant to coverage discussions, and which operational and policy topics are most pertinent for laboratory managers, billing professionals, and clinical leaders.
Billing Code Overview
CPT code 86593 describes a laboratory test in which a lab analyst evaluates the level of syphilis-related antibodies in patient specimens. This service is a serologic test for syphilis used to detect and quantify antibodies associated with Treponema pallidum infection.
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Service type: Laboratory diagnostic test (serology)
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Typical site of service: Clinical laboratory or hospital laboratory
Data not available in the input for associated taxonomies, ICD-10 diagnoses, and related codes.
Clinical & Coding Specifications
Clinical Context
A 28-year-old sexually active patient presents to an outpatient clinic with new genital ulcers and generalized rash. The clinician performs a focused sexual health history and orders laboratory testing to evaluate for syphilis. A phlebotomy technician collects a serum specimen which is sent to the clinical laboratory. A medical laboratory technologist or lab analyst performs a treponemal/non-treponemal serologic test to measure syphilis-related antibodies, documents results in the laboratory information system, and reports reactive or nonreactive results to the ordering provider. Results are used to confirm diagnosis, guide staging (primary, secondary, latent), and inform partner notification and treatment decisions. Typical sites of service include hospital outpatient laboratories, independent clinical reference labs, community health center labs, and public health clinics.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When billing only the professional interpretation component, if applicable in lab reporting situations where separate professional reporting is billed |
53 | Discontinued procedure | When specimen collection or testing was started but discontinued for clinical reasons prior to completion |