It depends on your state, but typically, they want you to fill out the CAQH application. But each insurance can be very different in how they go about the process. Medicaid and Medicare are a bit different, but again, you will most likely be required to fill out the CAQH. I would ask your colleagues who they take (insurance) and why. I currently only accept two carriers - one national, and one local (but quite large). I do this for two reasons:1) Reimbursement rates are pretty decent with each (the local being superior) and2) Ease of filing - one has a clearinghouse that they prfor free to providers, and the other pays so well, I don't mind filling out the claims forms by hand!I have been in private practice since 2022. and I have only recently began taking insurance. My learning curve has been interesting, but I will say, both groups I chose have been excellent to work with, thus far. Hope this helps!