Summary & Overview
CDT D0603: High-Throughput Antigen Testing for Public Health Pathogens
Headline: CDT code D0603: High-Throughput Antigen Testing for Public Health Pathogens
Lead: CDT code D0603 covers high-throughput antigen testing for public health–related pathogens, including SARS-CoV-2, billed on a per-day basis for laboratory services. The code standardizes reporting for large-scale antigen testing workflows used in surveillance and diagnostic settings.
What this code represents and national significance: CDT code D0603 captures laboratory-performed, high-throughput antigen testing for pathogens of public-health concern. As large-volume testing infrastructures remain a component of outbreak response and routine surveillance, a dedicated CDT code enables clearer billing, encounter tracking, and public-health reporting across laboratories.
Key payers covered: This analysis covers national private payers including Aetna; Blue Cross Blue Shield; Cigna Health; and UnitedHealthcare.
Overview of contents: Readers will find concise benchmarks and billing context for laboratory use of high-throughput antigen assays, comparisons to related infectious disease test codes, and clinical context for when antigen testing is applied. The publication highlights common service settings, coding relationships with nucleic acid and other antigen/antibody tests, and areas where input data is missing or limited.
Data limitations: Data not available in the input for service-line specifics and payer policy details; the publication notes where additional payer policy or reimbursement detail is needed.
Billing Code Overview
CDT code D0603 describes antigen testing for a public health-related pathogen, including coronavirus (COVID-19), using a high throughput technique, per day. The service type is Laboratory, and the typical site of service is Laboratory (POS 81).
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A patient who is symptomatic for respiratory infection or has known exposure to COVID-19 presents to a clinical laboratory or specimen collection site. A laboratory technologist receives specimens and performs an antigen test for a public health-related pathogen, including SARS-CoV-2 (COVID-19), using a high-throughput technique. Results are processed on automated platforms and reported to the ordering clinician and public health authorities as required. Typical workflow steps: order entry by the clinician, specimen accessioning in the laboratory (POS 81), high-throughput antigen assay performed per manufacturer instructions, result verification by laboratory personnel, and transmission of results to the clinician and health department.
Coding Specifications
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Common Modifiers
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QW: CLIA waived test — Use when the antigen assay performed is CLIA-waived and the testing location is certified accordingly. It indicates the test meets CLIA waiver criteria. -
59: Distinct Procedural Service — Use when the service is distinct and separate from other services provided on the same day and requires reporting as a separate laboratory procedure. -
Associated Provider Taxonomies
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