Southampton, NY, June 8, 2026 — Stony Brook Southampton Hospital (SBSH), a member of the Stony Brook Medicine healthcare system, today announced the appointment of Richard Stumacher, MD, MBA, FCCP as Chief Medical Officer (CMO). Dr. Stumacher will serve as the hospital’s senior clinical leader responsible for guiding quality, patient safety, physician engagement and the advancement of clinical programs. He will report directly to Emily Mastaler, Chief Administrative Officer, Stony Brook Southampton Hospital.
“Dr. Stumacher brings exceptional clinical expertise, operational insight and a deep commitment to ethical, patient‑centered care. His leadership experience across complex healthcare systems—and his passion for innovation in areas like AI, inpatient clinical care management and quality improvement—make him an extraordinary addition to our team,” said Ms. Mastaler. “We are thrilled to welcome him to our East End community and are confident he will play a pivotal role in advancing our mission.”
William Wertheim, MD, Executive Vice President at Stony Brook Medicine echoed her sentiments saying, “Dr. Stumacher embodies the values and forward‑thinking leadership that define Stony Brook Medicine. His deep experience in clinical quality and system‑wide innovation aligns perfectly with our commitment to elevating care across the East End. We look forward to the impact he will have as he partners closely with our teams to expand access, strengthen clinical excellence, and support the mission of Stony Brook Southampton Hospital within our growing health system.”
“Dr. Stumacher’s appointment reflects our continued commitment to bringing exceptional clinical leadership to the East End. His deep expertise in quality, safety and individualized care—and his forward‑thinking approach to innovation—will strengthen the connection between Stony Brook University Hospital and Stony Brook Southampton Hospital,” said Carol A. Gomes, Chief Executive Officer, Stony Brook University Hospital. “We are proud to welcome him into this key leadership role and look forward to the positive impact he will have on the communities we serve.”
Dr. Stumacher is a triple board‑certified physician in Internal Medicine, Pulmonary Medicine and Critical Care Medicine, bringing more than 20 years of clinical leadership across hospital operations, ethics and medical innovation. He holds an MBA from Hofstra University in Strategic Healthcare Management and is certified by the American Board of Artificial Intelligence in Medicine; an expertise that will play a critical role in the continued advancement of clinical programs on the East End. He served as Medical Director of Case Management at Stamford Hospital and previously held several senior leadership roles at Northern Westchester Hospital, including Associate Chief Medical Officer, Chief of the Division of Pulmonary and Critical Care Medicine, Chairman of the Medical Board and the Chair of the Ethics Committee. He has held academic appointments at several highly prestigious institutions, including The Zucker School of Medicine at Hofstra / Northwell, Weill Medical College of Cornell University, Albert Einstein College of Medicine, and Fordham University. Dr. Stumacher’s expertise has been featured in NBC News 4 New York, Fox Business, U.S. News & World Report and MedPage Today, reflecting his prominence as a clinician, educator and thought leader. Throughout his career, Dr. Stumacher has launched transformative initiatives in lung cancer screening, pulmonary embolism response systems, smoking cessation and AI‑driven clinical models.
In accepting the role, Dr. Stumacher shared his enthusiasm for joining SBSH, stating “I was drawn to the role of Chief Medical Officer because of the extraordinary commitment the hospital demonstrates as the sole provider of 24/7 emergency care and critical services on the South Fork, as well as to growing its centers of excellence in cardiology, orthopedics, surgical specialties, cancer care and breast health. I am equally inspired by the hospital’s leadership team, whose experience and proven record of success signal tremendous momentum and positions the hospital for transformative growth. Together, we have a remarkable opportunity to elevate care delivery and advance our mission of excellence for the communities we serve. The strength of the Stony Brook Medicine healthcare system—anchored by top ten ranked Stony Brook University Hospital and the Renaissance School of Medicine, the #1 public medical school in New York—creates an extraordinary environment for clinical innovation and academic collaboration.”
About Stony Brook Southampton Hospital (SBSH):
With 120 beds, Stony Brook Southampton Hospital (SBSH) is staffed by more than 280 physicians, dentists, and allied health professionals representing 48 medical specialties. SBSH offers a diverse array of clinical services, ranging from primary medical care to specialized surgical procedures, including cardiac catheterization, orthopedics and bariatrics. The sole provider of emergency care on Long Island’s South Fork, Stony Brook Southampton Hospital is a designated Level III Trauma Center and primary stroke center. The hospital includes the Stony Brook East Hampton Emergency Department, The Phillips Family Cancer Center, a Heart and Stroke Center, Breast Health Center, The Center for Advanced Wound Healing, Wellness Institute, and 32 satellite care centers throughout the South Fork of Long Island. The hospital is the largest employer on the South Fork with more than 1,200 employees. To learn more, visit www.southampton.stonybrookmedicine.edu.
About Stony Brook Medicine:
Stony Brook Medicine integrates and elevates all of Stony Brook University’s health-related initiatives: education, research and patient care. It includes five Health Sciences schools — Renaissance School of Medicine, School of Dental Medicine, School of Health Professions, School of Nursing and School of Social Welfare — as well as Stony Brook University Hospital, Stony Brook Southampton Hospital, Stony Brook Eastern Long Island Hospital, Stony Brook Children’s Hospital, Stony Brook East Hampton Emergency Department and more than 200 community-based healthcare settings throughout Suffolk County. To learn more, visit www.stonybrookmedicine.edu.