There are also tools like https://hunter.io/ and https://rocketreach.co/ which attempt to automate the process for you. I've had very mixed results with those kinds of tools, but they're worth knowing about.
However... hospitals have partners, contractors, vendors, processors. In your shoes I would be looking at people who want to interop with hospitals.
Some ideas:
- State Medicaid agencies. Generally do not have the tech staff, but they do have money and contracts, and much of it is set-aside for small business.
- Anyone with an NQIIC contract. All tasked with reducing provider burden and imprving care transitions. FHIR to the rescue. https://www.g2xchange.com/statics/cms-awards-25b-network-of-...
- Case in point. I need a legacy data dictionary transposed to FHIR elements so that instead of manual record abstraction I can ship an HL7-ready spec for data abstraction.
- Case reporting. There are FHIR-aware case reporting frameworks, no-one knows how to use them. There's a global pandemic on at the moment, so lots of case reporting is needed. Public health agencies exist in just about every county and city in the US.