OP, you originally mentioned insurance - does your policy cover pre-existing conditions? When were you diagnosed? This could be something you have to watch out for when claiming under private care.
For Quality Healthcare, they would possibly refer you out to one of their specialists but that wouldn't be an issue so long as you are sure you are covered for specialist care with a referral (most insurances work this way), but there may be an annual limit. You will need to look at your insured prescription benefit also as that is where a lot of expenses lie, especially if you are on some of the more expensive medications.
Good luck. I am with Dr. Norman Chan who moved from Qualigenics to open his own practice.