You can ask for recommendations from other medical professionals or organizations that have worked with medical software companies. This can be a good way to find companies that have experience in the specific area you need. I was personally recommended this way by the website
https://www.cogniteq.com/healthcare and they helped create a suitable application for my colleague's dental clinic. Software companies often have teams of software developers, project managers, and other professionals who work together to design and create software solutions for clients.