About
William P. Hennon, MD is a board-certified internist practicing in Glendale, Arizona. He earned his Bachelor of Science from Pennsylvania State University in 2008. He then completed his Doctorate of Medicine at Drexel University School of Medicine in Philadelphia in 2014. He trained at the Medical University of South Carolina in Charleston, completing both his internship and his Internal Medicine residency there between 2014 and 2017. The American Board of Internal Medicine has certified him in his specialty.
Dr. Hennon focuses on adult medicine, geriatric health, preventive care, and chronic disease management. He takes an evidence-based approach to conditions ranging from hypertension and diabetes to asthma, COPD, and infectious illness. He is passionate about helping patients pursue lasting wellness, not just managing acute concerns. He stays personally active and uses that commitment to guide and encourage his patients. Outside the office, he enjoys foreign travel, tennis, singing, home-based weight training, and spending time with family.
Education & Training
Undergraduate
Pennsylvania State University, University Park, PA - Bachelor of Science, 2008
Medical School
Drexel University School of Medicine, Philadelphia, PA - Doctorate of Medicine, 2014
Residency
Medical University of South Carolina, Charleston, SC - Internal Medicine, 2015-2017
Additional Training
Internship: Medical University of South Carolina, Charleston, SC, 2014-2015
Certifications
Conditions Treated
Who is Dr. Hennon right for?
Dr. Hennon is a strong fit for adults seeking a long-term relationship with a board-certified internist. Patients managing chronic conditions like hypertension, diabetes, or COPD benefit from his evidence-based approach. Older adults with geriatric health concerns find his focus on that population especially useful. Patients who want proactive preventive screenings and direct physician access will feel well-served here.
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Frequently Asked Questions
Dr. Hennon treats a wide range of adult conditions. His focus includes hypertension, diabetes, high cholesterol, asthma, COPD, and infectious illness. He also manages geriatric health concerns and coordinates cancer screenings. His preventive approach means he works with patients to catch and address risk markers early.
Yes, Dr. Hennon holds board certification from the American Board of Internal Medicine. He earned his medical degree from Drexel University School of Medicine and completed his residency training at the Medical University of South Carolina.
Dr. Hennon earned his undergraduate degree from Pennsylvania State University and his medical degree from Drexel University School of Medicine in Philadelphia. He trained at the Medical University of South Carolina in Charleston, completing both his internship and his Internal Medicine residency there between 2014 and 2017.
Dr. Hennon sees every patient himself. He does not delegate care to nurse practitioners or physician assistants. This direct approach is central to how he practices medicine.
Dr. Hennon takes an evidence-based approach to adult medicine. He focuses on long-term wellness rather than only addressing immediate concerns. He stays personally active and uses that commitment to encourage and guide his patients toward healthier habits.
Yes, geriatric medicine is one of Dr. Hennon's core specialties. He has specific training and focus in the health needs of older adults. His preventive and chronic disease management approach is well-suited to patients navigating the complexities of aging.
Yes, Dr. Hennon helps patients arrange care with local specialists and other providers, including when patients need assistance while traveling. He stays accessible by phone after hours and on weekends for these and other concerns.
Doctor profile last updated March 21, 2026