Guidance Needed for Validating Healthcare Company Data Retrieval

I ran a query by adding the counties and states of, US, and it successfully retrieved hospital and healthcare companies. The query also created a "Number of Records" column, where some entries have 5 records, while others have 10. Now, how should I proceed from here? I need to find the company names first, then their domains. After that, I need to validate whether the domains are correct or not. Finally, I need to find decision-makers within these companies. How can I efficiently complete this process? Can someone guide me, please?