Practice Information

Office hours

The Advanced ROS office is open 8:00 a.m. to 5:00 p.m., Monday through Friday. Treatment times may extend beyond these hours. Two physicians, Dr. Gerstley and Dr. Torrey, work together closely to provide you the care you need. Scheduling issues may make it necessary to see one or the other physician in the event you require immediate attention. Physician consultation and follow-up appointments are made through the front desk staff (Marilyn or Michelle). Appointments for treatment planning (CT simulation) or treatment times are made with your radiation therapist or Chief Therapist (Andrew). If you are not sure what your next appointment entails or have any questions pertaining to your care, please speak to the nursing staff (Chris or Tootie).

After Hours

If you call our office (845-727-0828) after hours, you will be connected to our answering service. The service will contact the physician on call, who will return your call. If your concerns can wait until morning, please call our office directly. If it is an emergency and you require immediate medical assistance, please go directly to the nearest emergency room.

Treatment Hours

Treatment times may extend beyond our regular office hours. We will try to give you appointment times that work best with your schedule. Please understand that many patients are receiving treatment and that there may be a limited number of available of treatment times at the start of your therapy. The technical aspects of your treatment might require a limited option for treatment times as well. If you require coordination of your treatment time with chemotherapy, we will work closely with your Medical Oncologist and make the appropriate arrangements.

Medical Problems or Questions

Please feel free to call us or speak to us when you are here to discuss any of your concerns. We ask that you discuss all medical concerns with the nursing staff (Chris or Tootie) as they will act as liaison for the physician. This could include symptom management, clearance for treatment, prescription renewals, exam scheduling and other questions for the physician.

Patient Education

We will provide you with specific information regarding your treatment. You will receive an information packet from the nurses at the time of your simulation or radiation planning. Additional information is available to you in the Cancer Center library located across the hall from our office. The Cancer Center library offers books and pamphlets on both traditional and complementary cancer care as well as Internet access.

Financial Services

We participate in most insurance plans and Medicare. To help us effectively assist you, please provide us with your complete, correct and current insurance information. We have financial services help available at our office as well as at our main billing office (877-584-1616). The financial service professional at Advanced ROS is Patti. She is available from 8 a.m. to 4 p.m., Monday through Friday and can be reached at (845) 727-0828. If Patti is unavailable and you have received a bill, please call the phone number on the bill (877-584-1616). They will be able to address any questions you have.
If you have any changes in your insurance or work status, please notify the front desk at the time of your visit. It is your responsibility to inform us of any changes in your insurance.


Parking is free for all patients. You will receive a pass for the parking lot from the front desk (Marilyn or Michelle) on your way out.