About
William N. Fenney, MD brings more than forty years of internal medicine experience to his Hyannis practice. He earned his Bachelor of Arts in Biology from Monmouth College in Monmouth, Illinois before completing his medical education at the University of Guadalajara and New York Medical College. He then trained at Carney Hospital in Boston, completing his internship, an Internal Medicine residency, and a Fellowship in Critical Care Medicine. Dr. Fenney holds board certification from the American Board of Internal Medicine and has served as an Attending Staff Physician at Cape Cod Hospital since 1984.
Dr. Fenney is passionate about preventive health and building genuine partnerships with his patients. He takes a proactive approach to care, pairing comprehensive screenings with personalized wellness plans. His goal extends beyond managing illness; he works alongside patients as they pursue long-term health improvements. m. hospital visit to check on a patient post-surgery and steady support through diagnoses ranging from breast cancer and cardiac disease to Barrett's Syndrome and dementia. Some patients have stayed with him for nearly three decades. Outside the office, Dr. Fenney enjoys tennis, surf fishing, skiing, gardening, cooking, and playing musical instruments.
Education & Training
Undergraduate
Monmouth College, Monmouth, IL - Bachelor of Arts in Biology
Medical School
University of Guadalajara, Guadalajara, Jal. Mexico (1974-1978); New York Medical College, Valhalla, NY (1978-1979)
Residency
Internal Medicine Residency, Carney Hospital, Boston, MA (1980-1982); Internship, Carney Hospital, Boston, MA (1979-1980)
Fellowship
Fellowship in Critical Care Medicine, Carney Hospital, Dorchester, MA (1982-1983)
Certifications
Conditions Treated
Who is Dr. Fenney right for?
Dr. Fenney is a strong fit for adults seeking a long-term primary care relationship with an experienced internist. Patients managing chronic conditions such as cardiac disease, diabetes, or dementia benefit from his proactive, preventive approach. He works well with patients who want thorough annual screenings and a custom wellness plan. Those navigating complex or serious diagnoses will find steady, knowledgeable support in his care.
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Frequently Asked Questions
Dr. Fenney specializes in internal medicine and preventive medicine. He focuses on comprehensive health screenings, chronic disease management, and personalized wellness planning. His more than forty years of practice give him deep experience managing a wide range of complex conditions.
Yes, Dr. Fenney holds board certification from the American Board of Internal Medicine. He earned this credential after completing his internship and Internal Medicine residency at Carney Hospital in Boston.
Dr. Fenney completed his medical education at the University of Guadalajara and New York Medical College. He then trained at Carney Hospital in Boston, finishing an internship, an Internal Medicine residency, and a Fellowship in Critical Care Medicine.
Dr. Fenney treats a broad range of conditions, including cardiac disease, cancer, dementia, and Barrett's Syndrome. He also manages chronic diseases, coordinates travel care, and delivers preventive screenings. His critical care fellowship background gives him strong footing with complex and serious diagnoses.
Dr. Fenney has practiced on Cape Cod since 1984, when he joined the Attending Staff at Cape Cod Hospital. He has built his Hyannis practice over more than four decades. Many of his patients have trusted his care for nearly thirty years.
Yes, Dr. Fenney remains reachable by phone around the clock, including evenings, weekends, and holidays. This direct access is a core part of his MDVIP-affiliated concierge practice.
Dr. Fenney takes a proactive, preventive approach. He pairs comprehensive screenings with custom wellness plans designed around each patient's goals. His focus extends well beyond managing existing illness to helping patients achieve long-term health improvements.
Dr. Fenney coordinates referrals through MDVIP's Medical Centers of Excellence, connecting members with specialist resources when needed. He manages the coordination process personally to support continuity of care.
Doctor profile last updated March 21, 2026