ChatGPT Named Most Final-Shortlist Medical Providers in Its First Search Queries

A descriptive US-English benchmark of medical-provider names observable in query strings of the first returned web-search action and in the final four-provider shortlist from one chat-latest Responses API configuration. The release contains 180 commercial medical-provider responses across 72 frozen prompt cells, six service lines and three metros. Of 720 final provider positions, 612 (85.0%) were occupied by organizations already named in query strings of the first returned web-search action; at least one provider appeared there in 179 of 180 responses (99.4%). It includes scenario, segment, anonymous response-level and stability metrics, 144 complete repeat pairs, a 72-cell prompt manifest, a data dictionary, charts, checksums, citation files and a 10-sheet XLSX workbook. Fieldwork: August 18, 2026. Author: Evgeniy Yudin (Rotgar Research). Boris Teplyakov reviewed the research methodology as SEO Lead. This was not a clinical subject-matter review or an assessment of the providers named in the responses. This is a dated descriptive benchmark of observable stages; it does not identify hidden model reasoning, establish causality or assess provider quality. Canonical study: https://rotgar.com/medical/resources/chatgpt-medical-provider-shortlists