Dr. Leunissen has one office in Pennsylvania where he specializes in Internal Medicine. Learn more.
The specialty of internal medicine is an area of primary care for adults. Dr. Leunissen specializes in diagnosing and treating cross-system illnesses that may affect multiple organ systems. Dr. Leunissen can also refer patients to specialist physicians when medically needed. For instance, patients with skin conditions may be referred to a dermatologist for further diagnostic tests or treatment plans.