Summary & Overview
CPT 86753: Serologic Immunoassay for Protozoan Antibody
CPT code 86753 designates a laboratory immunoassay to detect serum antibodies to a protozoan when no more specific code applies. This code captures a range of serologic testing used to identify immune responses to protozoan pathogens and is relevant for infectious disease diagnosis, public health surveillance, and laboratory billing standards nationwide. Its use affects clinical reporting and laboratory workflows when targeted, organism-specific codes are not available.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication outlines payer coverage patterns, common modifiers observed with lab services, clinical context for ordering serologic assays, and operational benchmarks for laboratory processing and coding.
Readers will learn the clinical scope of CPT code 86753, typical sites of service where the test is performed, and how this code is applied when more specific protozoan antibody codes are absent. The report also summarizes payer coverage considerations, expected documentation elements, and where to find relevant coding guidance. Data not available in the input are noted where applicable.
Billing Code Overview
CPT code 86753 describes an immunoassay performed by a laboratory analyst to detect serum antibodies to a protozoan when no more specific code exists. The procedure evaluates a patient’s blood serum for presence of antibodies indicating exposure or immune response to a protozoan infection.
-
Service type: Laboratory serologic immunoassay
-
Typical site of service: Clinical laboratory or hospital laboratory setting
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 34-year-old outpatient presents to a primary care clinic with a 2-week history of persistent fever, malaise, and intermittent abdominal pain after recent travel to an area endemic for protozoan infections. The clinician obtains a serum specimen and orders an immunoassay to detect antibodies to a protozoan pathogen when no more specific test code exists. The specimen is collected by phlebotomy and sent to the hospital or reference laboratory. In the laboratory, a clinical laboratory scientist or medical technologist performs an immunoassay (e.g., enzyme immunoassay or chemiluminescent immunoassay) targeting IgG and/or IgM antibodies to the suspected protozoan. Results are reported to the ordering provider for correlation with clinical findings, travel history, and, if needed, confirmatory testing or empiric therapy.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing for the physician or pathologist interpretation portion separate from the technical lab work. |
TC | Technical component | Use when billing for the laboratory technical component only; commonly used by reference labs. |