Summary & Overview
CPT 86687: HTLV I Antibody Immunoassay, Serum
CPT code 86687 represents a laboratory immunoassay used to detect antibodies to human T-cell lymphotropic virus Type I (HTLV I) in patient serum. This serologic test supports clinical diagnosis and public health surveillance by identifying prior or current exposure to HTLV I, an infection associated with neurologic and hematologic conditions. Nationally, accurate coding of such infectious disease assays matters for lab reporting, public health tracking, and appropriate payer reimbursement across settings.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of how 86687 is used in clinical workflows, typical sites of service, and the service type classification as a laboratory diagnostic immunoassay. The publication summarizes common billing considerations, payer coverage patterns, and relevant benchmarking where available. It also outlines clinical context for test ordering and typical indications that prompt serologic evaluation for HTLV I.
This resource is written for a national audience of health policy analysts, laboratory managers, and revenue cycle professionals who need a concise reference on CPT code 86687, including what the code represents, which payers commonly cover the service, and the practical context for its use in laboratory settings. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 86687 describes an immunoassay performed by a laboratory analyst to evaluate a patient’s serum for antibodies to human T-cell lymphotropic virus Type I (HTLV I). This test is a serologic antibody assay used to detect prior or current exposure to HTLV I and supports clinical evaluation of patients with relevant risk factors or symptoms.
Service type: Laboratory diagnostic immunoassay
Typical site of service: Clinical laboratory or hospital laboratory
Clinical & Coding Specifications
Clinical Context
A 38-year-old adult patient presents to an outpatient infectious disease clinic after screening as part of a blood donation workup and history of possible exposure (sexually active with a partner from an endemic area). The clinician orders serologic screening for human T-cell lymphotropic virus Type I (HTLV-I) to detect antibodies. A phlebotomy technician collects a serum specimen in the clinic laboratory or an ambulatory phlebotomy site. The specimen is transported to the clinical laboratory where a medical technologist or lab analyst performs an immunoassay, usually an enzyme immunoassay (EIA) or chemiluminescent immunoassay (CLIA), to detect anti-HTLV-I antibodies. Positive or indeterminate screening results are reflexed to confirmatory testing (e.g., Western blot or PCR) per laboratory protocol. Typical sites of service include outpatient clinic, blood bank, hospital laboratory, and independent reference laboratory. The workflow involves physician order entry, specimen collection and labeling, laboratory accessioning, immunoassay performance and result validation, and reporting to the ordering provider with appropriate follow-up recommendations documented in the medical record.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the physician interpretation component if the lab sends technical component to another entity (rare for immunoassay). |