About
Lillian E. Cohn, MD, FACP brings over four decades of internal medicine experience to her Center City Philadelphia practice. She earned her undergraduate degree in Psychology, Magna Cum Laude, from the University of Buffalo in 1972, then completed pre-medical studies at Columbia University. She graduated from Boston University School of Medicine in 1978 and completed both her internship and residency in internal medicine at Pennsylvania Hospital in Philadelphia. The American Board of Internal Medicine certifies her in internal medicine and geriatrics.
Dr. Cohn holds appointments at Pennsylvania Hospital and Thomas Jefferson University Hospital, where she has practiced since the early 1980s and 1990s respectively. She serves as Clinical Associate Professor of Medicine at the University of Pennsylvania and as Adjunct Clinical Assistant Professor at Thomas Jefferson University School of Medicine. She actively teaches residents and students at both institutions. Best Doctors in America recognized her from 2005 through 2012. She speaks Spanish and Portuguese. Patient advocacy sits at the center of her practice philosophy. She takes an honest, direct approach to communication while staying attentive to each patient's individual needs and goals. Her clinical focus spans preventive medicine, chronic disease management, acute care, and end-of-life care coordination.
Education & Training
Undergraduate
University of Buffalo, BA Psychology, Magna Cum Laude, 1972; Columbia University, Pre-Medical, 1974
Medical School
Boston University School of Medicine, Doctorate of Medicine, 1978
Residency
Pennsylvania Hospital, Philadelphia, PA, Internal Medicine, 1978-1981
Certifications
Languages
Spanish, Portuguese
Conditions Treated
Who is Dr. Cohn right for?
Dr. Cohn is a strong fit for adults who want a long-tenured internist with deep expertise in both primary and geriatric care. Patients managing chronic conditions such as diabetes, hypertension, or heart disease benefit from her preventive and longitudinal approach. Older adults navigating complex health needs find particular value in her geriatrics certification. Patients who appreciate direct, candid communication and genuine attention to their individual goals tend to thrive in her practice. Spanish and Portuguese speakers also find Dr. Cohn accessible.
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Frequently Asked Questions
Dr. Cohn specializes in internal medicine, geriatric medicine, and preventive medicine. She treats the full spectrum of adult health concerns, from routine screenings and chronic disease management to acute illness and end-of-life care coordination. The American Board of Internal Medicine certifies her in both internal medicine and geriatrics.
Dr. Cohn has practiced medicine for more than four decades. She completed her residency at Pennsylvania Hospital in 1981 and has maintained her clinical presence there ever since. Her longevity in Philadelphia's medical community reflects a deep commitment to the patients she serves.
Dr. Cohn holds staff appointments at both Pennsylvania Hospital and Thomas Jefferson University Hospital. She has practiced at Pennsylvania Hospital since the early 1980s and at Thomas Jefferson since the early 1990s.
Yes, the American Board of Internal Medicine certifies Dr. Cohn in internal medicine and geriatrics. She earned her medical degree from Boston University School of Medicine in 1978 and completed her residency training at Pennsylvania Hospital in Philadelphia.
Dr. Cohn actively teaches residents and students at two institutions. She serves as Clinical Associate Professor of Medicine at the University of Pennsylvania and as Adjunct Clinical Assistant Professor at Thomas Jefferson University School of Medicine.
Yes, Dr. Cohn speaks Spanish and Portuguese, which allows her to serve a broader range of patients across the Philadelphia region.
Dr. Cohn takes an honest, direct approach to communication while staying genuinely attentive to each patient's individual goals. Patient advocacy sits at the center of her practice philosophy. She aims to give patients a clear picture of their health and work collaboratively toward their personal priorities.
Dr. Cohn focuses exclusively on adult patients. She draws patients from southeastern Pennsylvania, New Jersey, Delaware, and Maryland. Her geriatrics certification makes her particularly well-suited for older adults managing complex or chronic health needs.
Doctor profile last updated March 21, 2026