The rapid growth opens up doors for unqualified supervisors/managers, very lax hiring standards, and inadequate training for new-hires. Don't believe the recruiters when they say it's "not another call center" - it IS a call center that is operating under the guise of "patient service". If you're looking to work at a call center then you'd be happy at Sutter, but just know what you're getting into before you buy into the sales pitch. You'll be speaking with irate patients every day, so be sure that you can stomach difficult situations on a regular basis. The work is stressful, and on some days you will be taking calls back-to-back with little to no support from your superiors. Those few patients that you legitimately help will provide the fulfillment needed to get through the day.
I'd recommend trying to advance as fast as possible into an area that is off the phones (6 months minimum), but be be prepared for plenty of competition and politics regarding who is chosen for promotions. Also, be prepared to see many very young employees in formal leadership roles; requirements for certain positions get thrown out the window when nobody in the pool of candidates actually meet the criteria for the position (i.e. a degree or experience).