Healthcare plans for individuals in MA

Hi all. I am a graduate student about to turn 26. The university health plan is not sufficient for my somewhat complex medical profiles because all of the providers I currently see would be out of network and switching would be a nightmare. My budget is not unlimited, but being able to access my providers without too much hassle from my insurance company is something I am willing to pay somewhat of a premium for. Is anyone aware of plans for individuals that allow people to see most Mass General and Boston Children's providers as well as receive urgent and emergency care and physical therapy through the Mass General Brigham network? Thank you in advance for any insights you have to share.