I used to use Private Practice. It's a really well made mod, and I enjoyed it until recent additions. I was not a fan of their addition of the flu and cold, because it was causing all of my sims and every single NPC to be sick and miserable 24/7. They have since adjusted it, but I still find it a little too excessive. I also disliked that I needed to go to an active clinic every single time my sims needed treatment. While I love the option to do that, sometimes I just want to send the sick sim to the clinic alone and stay at home and work on another sim in the household. Going to the clinic would sometimes take all day, especially if the whole household got sick. I do believe they have plans to add rabbitholes back.
I'm currently using adeepindigo's Healthcare Redux, and honestly, I think it's more enjoyable and has more options. While it does add deadly diseases, it has a nondeadly version (I use that one). I also really love the prenatal additions and the chronic conditions your sims can have.