As an anesthetist, I am joining a private group this summer which covers a GI group. 30-40 colonoscopies is indeed very doable. More than a few groups I interviewed at were involved in this, as it is very lucrative for anesthesia as well the GI docs. These places are very efficient, and need to have a very good phase II recovery protocol in place. Some GI docs still sedate themselves, using an opioid plus a benzo. However, it takes time to titrate to effect safely, and recovery may be up to a few hours in older patients. The centers doing 30-40 cases per room per day uses an anesthesia staff, and use, for the most part propofol only. 50-100mg of propofol iv, is sufficient for most colonoscopies with no other meds given. A good colonoscopist is done in less than 10 minutes, often 5 from the time the scope goes in. The anesthesia bill is separate from the GI docs bill, so once the GI doc sees how efficient this is, how much happier the patients are, and mostly how much cash they are raking in, they love having anesthesia handle the seadtion. It can be a very nice way to offset non-insured patients and can boost an anesthesia practice's income tremendously. Typical reimbursement is 500-1100 in the greater NYC area.