Description. Could you be our next Ambulatory Registered Nurse at Marks Colorectal Surgical Associates in Lankenau Medical Center. Why work as a Ambulatory Registered Nurse. Make an Impact. . Join a team of Colorectal Surgical providers who seek to provide compassionate and thorough care. Take pride in transforming care into "what patients want it to be" through care coordination and communication. You will be working with patients. . from aroun...