Sean Cahill, MD Longevity & Concierge Medicine is a membership-based concierge practice located on Chicago's iconic Gold Coast, offering a small patient panel and the kind of deeply personalized, prevention-first care that is rarely available in a traditional primary care setting. Board-certified in both internal medicine and pediatrics, Dr. Cahill brings more than 20 years of clinical experience to a practice built around one core conviction: that most serious illness is preventable, and that the time to act is before symptoms appear. Patients who join his practice receive extended appointments, direct physician access, same-day scheduling, and a proactive health partnership that integrates longevity science, metabolic optimization, weight management, and chronic disease prevention into a coherent, personalized plan — all under the supervision of a physician who also teaches these exact principles to the next generation of doctors at Northwestern's Feinberg School of Medicine.

About the Physician

Dr. Sean Cahill, MD, FAAP, FACP, earned his Bachelor of Arts from the University of Notre Dame before completing his medical degree at Loyola University's Stritch School of Medicine in 1999. He completed a combined Internal Medicine and Pediatrics residency at Loyola University Medical Center — a demanding dual-board track that relatively few physicians pursue — and has since maintained board certification with both the American Board of Internal Medicine (2003) and the American Board of Pediatrics (2004). He was elected Fellow of the American College of Physicians (FACP) in 2007 and Fellow of the American Academy of Pediatrics (FAAP) in 2004. Dr. Cahill currently serves on the clinical faculty at Northwestern University's Feinberg School of Medicine, where he teaches medical students and residents in chronic disease management, preventive care, and men's health. He is also a recognized expert witness in medical malpractice litigation — a role that reflects his deep command of clinical standards across both internal medicine and pediatrics. He practices at 680 N. Lake Shore Drive and sees patients at Northwestern Memorial and Central DuPage Hospital.

Services Offered

• Longevity Medicine — A proactive, data-driven approach to healthy aging that combines comprehensive screenings, advanced biomarker testing, and personalized wellness planning to extend both lifespan and healthspan — starting in your 30s or 40s, before problems develop.
• Concierge Primary Care (Internal Medicine & Pediatrics) — Membership-based care for adults and children, providing same-day access, extended appointments, direct physician contact, and continuity with a physician who knows your full history and long-term goals.
• Chronic Disease Management & Prevention — Individualized management of hypertension, diabetes, cardiovascular disease, thyroid disorders, and other chronic conditions — focused on root-cause treatment and preventing progression rather than just controlling symptoms.
• Weight Management — Physician-supervised weight loss integrating metabolic assessment, nutritional strategy, exercise guidance, behavioral approaches, and medication when clinically appropriate — including GLP-1 options for eligible patients.
• Executive Health Physicals — Comprehensive health evaluations for busy executives that go far beyond the standard annual exam — reviewing cardiovascular risk, metabolic function, cognitive health, hormone status, and lifestyle risk factors in depth.
• Hormone Optimization — Evaluation and personalized management of hormonal imbalances in men and women, including testosterone, estrogen, progesterone, thyroid, and cortisol — based on labs and symptoms, with ongoing monitoring.
• Cognitive Assessment — Early detection and monitoring of cognitive changes, including risk assessment for Alzheimer's disease and dementia, using validated screening tools and targeted lifestyle interventions to preserve brain health.
• Advanced Diagnostic Testing — Genetic testing, cardiovascular panels, hormone and inflammation markers, microbiome analysis, biological age testing, and epigenetic profiling — to build a precise, individualized health picture that guides your long-term plan.
• Virtual Care — Telehealth visits that deliver the same high-quality, personalized care for patients throughout Chicago and the Western Suburbs — for follow-ups, lab reviews, and ongoing health management from anywhere.

What to Expect

Sean Cahill, MD Longevity & Concierge Medicine is located at 680 N. Lake Shore Drive, Suite 118, Chicago, IL 60611. Office hours are Monday through Friday 9:00 AM–5:00 PM. Call (224) 223-1452, email sean@seancahillmd.com, or schedule a Meet & Greet at seancahillmd.com.