I work for a large, incorporated group practice with a number of specialties and each office does their own thing when it comes to care models.
There are practices in which the RNs are used only for phone triage, paperwork and refills and the MAs have the clinical responsibilities (rooming patients, VS, chief complaint, meds, etc. I have worked in Neurology and Neurosurgery, both of which have RNs working for 2-3 physicians, NPs working with one physician, and no MA or only one for an entire practice of 20 MDs. Obviously, this is the other end of the spectrum--we clean and stock our own rooms, perform phone triage, run our clinics (4 days per week), set up surgeries, exams/testing and perform other coordination of care duties, fill out all LOA and disability paperwork, make appointments at times, and see patients in Nurse Visits on half-day or non-clinic days for suture and staple removal, reassessment and education. As I have said in the past, I feel like chief, cook and bottlewasher! There is almost never downtime for lunch or even a bathroom break at times.......
If it were in my power to design a staffing model which accomplishes the end of excellent patient care and running the clinics smoothly, I would have MAs partner with RNs (1-3 depending on the patient load and clinic schedules)where the MA spends 85% of their time in clinic, 5% of their time stocking, ordering supplies and straightening up rooms, and 10% of the time returning calls that are appropriate to their experience level as well as doing some of the coordination of care--setting up exams, tests and such. RNs would continue to do phone triage but would also see all new patients to establish a relationship, obtain a history, and identify specific care and educational needs. Return patients should also have access to the RN as needs are identified. I believe that RNs are terribly under-utilized when they are "chained to a desk" and never see patients or perform hands-on care or teaching.
Every office or practice should be evaluated individually, and the question of how a RN is utilized within the practice should be asked during the interview. I would also find out how flexible they are about having RNs develop educational programs and actively perform teaching and other care responsibilities during clinics.
Good luck to you in returning to Nursing!