Dr. John Joseph Messmer III, MD

Dr. John Messmer is a family medicine physician who specializes in geriatric medicine, bringing nearly five decades of medical expertise to his practice. He earned his medical degree from Pennsylvania State University College of Medicine and completed his residency training at the United States Naval Medical Center. With 49 years of experience caring for patients, Dr. Messmer offers comprehensive healthcare services for individuals and families. He is fluent in Chinese, English, French, and Spanish, allowing him to communicate effectively with diverse patient populations.

Dr. Messmer practices at Penn State Health Milton S Hershey Medical Center and serves patients across multiple locations in Pennsylvania, including Palmyra, Camp Hill, Lebanon, and Hershey. His clinical expertise focuses on age-related conditions such as Alzheimer's disease, dementia, and cognitive impairment. He incorporates therapeutic approaches like physical therapy and strength training into patient care plans, …along with occupational therapy to help maintain independence and quality of life. Patients consistently rate Dr. Messmer highly, giving him an average rating of 5.0 on Vitals.