Summary & Overview
HCPCS G0145: Cervical or Vaginal Screening Cytopathology, Automated Thin-Layer
HCPCS Level II code G0145 covers screening cytopathology for cervical or vaginal specimens collected in preservative fluid using automated thin-layer preparation, with primary screening by an automated system and manual rescreening under physician supervision. This code captures a common laboratory workflow that combines automation for high-throughput primary screening with clinician oversight for quality control, relevant to preventive care and early detection of cervical pathology.
Key national payers in scope include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical service and coding context, payer coverage considerations, typical sites of service, and operational implications for laboratories and outpatient clinics. The publication outlines benchmarks and policy-relevant updates where available and clarifies which elements are not provided in the input. The content is intended to inform billing staff, laboratory managers, and health policy analysts about code definition, common use cases, and where this screening modality fits within cervical cancer prevention workflows.
Data not available in the input includes associated taxonomies, specific ICD-10 diagnoses, detailed payer reimbursement rates, and related codes.
Billing Code Overview
HCPCS Level II code G0145 describes screening cytopathology of cervical or vaginal specimens collected in preservative fluid with automated thin layer preparation, where the initial screen is performed by an automated system and a manual rescreening is performed under physician supervision. This service represents laboratory-based screening of cervical or vaginal cells for cytologic abnormalities using an automated primary screen followed by human technician or physician review of flagged or rescreened slides.
Service type: Laboratory screening cytopathology using automated thin layer preparation and manual rescreening under physician supervision.
Typical site of service: Clinical laboratory or hospital laboratory performing cytology services; specimen collection typically occurs in outpatient gynecologic clinics or primary care settings with subsequent laboratory processing.
Clinical & Coding Specifications
Clinical Context
A typical patient is a reproductive-age or postmenopausal woman presenting for routine cervical cancer screening, surveillance after an abnormal Pap test, or evaluation of new vaginal bleeding or abnormal cervical cytology. The clinician collects a cervical or vaginal specimen using a broom or cytobrush and places the sample into a preservative fluid (liquid-based cytology). The laboratory performs an automated thin-layer preparation (e.g., ThinPrep or equivalent) and runs the specimen through an automated screening system. A cytotechnologist or automated system flags atypical or abnormal fields, and a pathologist performs manual rescreening and provides final review and sign-out under physician supervision. Typical sites of service include outpatient gynecology clinics, primary care offices, community health centers, and independent or hospital-based cytology laboratories. The workflow: patient visit → specimen collection in preservative fluid → specimen accessioning and automated thin-layer preparation → automated screening → manual rescreening/physician review → result reporting to ordering provider. Common clinical reasons include routine screening, follow-up of prior abnormal cytology, post-treatment surveillance, or evaluation of symptoms such as abnormal vaginal bleeding or pelvic pain.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the professional interpretation component separate from the technical component. |