You can find many ideas for this niche. For example patient info app. It contains patients list, patient summary, lab results, medication list, clinical notes, vital signs, allergies, current treatment information, doctor notes. I think it can be very useful. When you will find your idea I recommend you to contact Reinvently company
https://reinvently.com/healthcare-app-development/ to implement it. As you can see they have good experience in healthcare.