Internal Medicine
Shereen Dahab, D.O.
Dr. Shereen Dahab is a graduate of NYIT COM in Long Island NY. She was born and raised in New Jersey and loves NJ as evident by the New Jersey coffee mug and coaster in her office. She completed her residency at a HMH sister hospital Jersey Shore University Medical Center and after graduation completed three and a half years working as a primary care physician and at an acute care rehab facility. She came back to Mountainside this past April 2025 due to her love of teaching.
Yosleisy Valdes Hernandez, M.D.
Dr. Valdes Hernandez is a native of Cuba, graduating from the Universidad de Ciencias Médicas de La Habana. He also completed internal medicine residency training at Mountainside and has continued to work here in the private group sector since. Dr. Valdes Hernandez is passionate about resident education and believes in deepening one’s understanding of patients’ underlying pathophysiology to better manage complex cases. Outside of the hospital, Dr. Valdes Hernandez has a wide array of hobbies, including hiking and camping with his wife and kids, guitar playing, and weightlifting.