Highland Internal Medicine

Dr. Stern

Ronald A. Stern, MD

Dr. Ronald A. Stern is a primary care physician specializing in internal medicine and has been practicing since 1985. He has a diverse multigenerational practice that draws its patients from Rockland County, New Jersey, and other areas of New York. He is multilingual, with fluency in Spanish and German. In his practice, Dr. Stern encourages a healthy lifestyle based on proper diet and exercise. He enjoys spending time with his patients, educating them about their health, and believes that interpersonal attention, individual care and genuine interest in a patient’s well being are an important part of his practice.

Dr. Stern received his medical doctorate from the Autonomous University of Guadalajara in Mexico. He completed his Residency at Englewood Hospital in Englewood, NJ, and currently has Senior Attending privileges at Montefiore Nyack Hospital.

Serena C. Fisher, MSN, FNP-BC

Serena C. Fisher, MSN, FNP-BC

Serena Fisher, MSN, FNP-BC is a board-certified Family Nurse Practitioner at Highland Internal Medicine located in Garnerville, NY. She received her Masters of Science degree as a Family Nurse Practitioner at Dominican College in Blauvelt, NY. Most recently Serena was an Assistant Nurse Manager in the Emergency Department at Montefiore Nyack Hospital. Serena also works as an adjunct professor at Rockland Community College in Suffern, NY.