After you start the paperwork for the new job, you can request the health insurance plan information from HR (or your boss if it is a small business). You can talk with HR/benefits or the insurance company about whether having the insurance means you have no Medicaid coverage (probably). They can also give you a list of what is covered and copays--that's how you can find out what your therapy will cost. If it is exorbitant, you can also talk with your T about finding a way to make it more affordable.

Congratulations on the job!