The schedule is controlled by the insurance company. I live in a rural area and my doctor/hospital is 2 hours away in another state. They allowed me to attend support groups that were local and scheduled all my medical appointments on the same days (pulmonologist, Endocrinologist, surgeon, dieticians etc. the time frame for mine was 1 year...they were not flexible about that at all.
I had my Bypass on 12/11/19 and finally feeling normal. I have not had insulin since the day of surgery.