Hospital Medicine Specialists

A board-certified Internist with more than 20 years’ experience as a physician, Dr. Dorval-Dorcely was residency-trained at the North Shore University Hospital NYU Medical Center in Manhasset, NY.

Fred Kavanagh brings more than 23 years of professional experience and certified expertise to Peconic Bay Medical Center in the areas of family practice and hospital medicine. Licensed by New York State as a Physician Assistant, Fred graduated from the Physician Assistant Education program at Stony Brook University.

Prior to his career as a Physician Assistant, Fred worked as a New York City Paramedic. Fred has also volunteered for over 20 years as a youth hockey coach and referee.

Dr. Kornahrens has been a Registered Nurse for more than 20 years, the majority of which have been within the critical care arena. She received her BS in Nursing from Stony Brook University, and continued on to earn Master of Nursing degrees from the University of Pittsburgh and Stony Brook University as well as Post-Masters Certificate from the University of Pennsylvania. She completed her doctorate at Stony Brook University, where she has been a member of the Family Nurse Practitioner faculty for seven years.

Dr. Kornahrens maintains triple board certification, specializing as a Family Nurse Practitioner, Emergency Nurse Practitioner and Adult Gerontological Acute Care Nurse Practitioner from the American Association of Nurse Practitioners and the American Nurses’ Credentialing Center, while maintaining an active body of scholarship with a focus on complex patient populations.

Dr. Kornahrens has participated in many national multi-center critical care clinical research trials, most recently on Assisted Fluid Management and Hypotension Prediction Index. She recently completed her two-year term as the Treasurer for the Nurse Practitioner Association of Long Island and has been named President Elect of the organization. She continues to hold positions on regional, national, and international organizations as well as a seat on the Editorial Board for the Journal of Radiology Nursing.

Board-certified in Family Medicine, Dr. Blaise Napolitano brings more than 15 years of professional experience and expertise to Peconic Bay Medical Center’s Israel Family Ambulatory Center practice in Greenport. Fluent in English and Spanish, Dr. Napolitano earned his Medical Doctorate from Ponce Health Sciences University and completed his residency in Family Medicine at Stony Brook University Hospital.  Over his career he has garnered experience working both in primary care well as hospital care in which he obtained additional qualification.

Before joining Northwell Health in 2015, Dr. Napolitano served as Regional Medical Director for Hudson River Healthcare in Greenport.  When he is not practicing medicine, Dr. Napolitano is likely passing the time with his family on the North Fork or fly fishing from his kayak, “Hobie-Dick.” 

Dr. Napolitano welcomes new patients. Waiting times for appointments are typically short. Every effort is made to accommodate patients' schedules for scheduling school physicals, vaccinations and routine screenings. Most insurance plans, Medicare and Medicaid are accepted.

Dr. Conor Parks brings more than four years of professional experience and certified expertise to Peconic Bay Medical Center in the areas of hospital medicine and family medicine.

Dr. Parks is a graduate of Fordham University, obtaining his Bachelor of Science in 2010. He obtained his medical degree from New York Institute of Technology College of Osteopathic Medicine in 2014. After medical school, he completed a three-year residency in Family Medicine at Plainview Hospital, a part of the Northwell Health.

Dr. Parks serves as core faculty for both the family medicine and transitional year residencies at Peconic Bay Medical Center. In addition, Dr. Parks holds facultyappointments at the Zucker School of Medicine at Hofstra/Northwell and NYIT College of Osteopathic Medicine. Dr. Parks’s clinical interests include sepsis and resident education.

In his spare time, Dr. Parks enjoys spending time with his family and dog, Hank.

Dr. Clifton Umstead brings to Peconic Bay Medical Center over five years of experience as a Family Medicine Physician who specializes in Hospital Medicine. Licensed by New York State to practice medicine as a Physician, Dr. Umstead received his Doctor of Osteopathic Medicine degree from West Virginia School of Osteopathic Medicine. He holds a Bachelor of Science degree from the University of Charleston.

As full-time clinical Family Medicine residency staff faculty member, Dr. Umstead brings a rounded practice-based approach to his patients. He is devoted to the ongoing improvement of the practice of medicine by helping his team of residents to learn expertise in diagnosis and treatment for improved outcomes.

Besides teaching, Dr. Umstead enjoys spending time with his family, boating, fishing (especially shark fishing), running and snowboarding.