The Future of Virtual Specialty Care

We founded Summus to restore the human connection between patients and the collective wisdom of our medical community. Our vision is to be the global hub of leading medical expertise for all. Today, Summus serves as the digital front door to high quality virtual specialty care for millions of families around the world. Leveraging technology, we empower families across the continuum of care by bringing personalized expert advice to every medical decision.

Leadership and Founders

Julian Flannery
Julian Flannery | Founder & CEO
Julian previously served on the management team and was Managing Director, Global Research at Gerson Lehrman Group, the world's largest membership-based platform for professional expertise. He oversaw GLG's service operation, products, and content, and directed management of its 400,000+ expert membership base. He formerly worked at Morgan Stanley as Associate and Chief of Staff to the Chairman & CEO and in Special Situations and Investment Banking. In 2001, he served in The White House as an aid to the Chief of Staff to the President. He received his M.B.A. from Harvard Business School and A.B. in Economics from Duke University.
Jessica Spiegel
Jessica Spiegel | Vice President of Member Experience
Jessica is a founding member of Summus and leads Member Experience and Customer Success teams. She oversees all aspects of the member experience for Summus clients and leads the Customer Success team responsible for maximizing the value Summus delivers to its clients. Jessica was previously Vice President at Gerson Lehrman Group (GLG), where she was responsible for product strategy and managed relationships for financial services clients. Prior to GLG, Jessica was an associate in the commercial real estate department at Stroock & Stroock & Lavan LLP. Jessica holds a J.D from Fordham Law School and an A.B. with highest honors from The Johns Hopkins University.
Dennis Purcell
Dennis Purcell | Chief Operating Officer
Denny is a founding member of Summus, and serves as Chief Operating Officer. In this role, he oversees all day-to-day operations and leads Summus' data strategy. Denny also oversees relationships with Academic Medical Centers where Summus supports virtual specialty care programs. He formerly worked at UBS Investment Bank as an investment banker in the Leveraged Finance Group. He received his M.B.A. from Harvard Business School and A.B. in Applied Mathematics from Harvard College, where he was a Research Associate for former U.S. Treasury Secretary Larry Summers.
Nick Razzi
Nick Razzi | Chief Sales Officer
Nick oversees all aspects of commercial sales and revenue generation for Summus. Nick has more than 16 years’ experience in executive sales management and scaling high performing sales organizations. Prior to Summus, he served as the VP of Sales at Colibri Group, a leading online learning solution for professionals to manage and advance their careers which was sold in 2019. Previously, he led the Paychex Insurance Agency sales organization where he was responsible for overall sales strategy, client retention and sales training. Nick holds an A.B. in Business Management from the University of Delaware.
Mary Mulcare, MD
Mary Mulcare, MD | Chief Medical Officer
Dr. Mary Mulcare serves as the Company's Chief Medical Officer and oversees all clinical aspects of Summus operations. Mary also serves as a Clinical Assistant Professor of Emergency Medicine at NewYork-Presbyterian/Weill Cornell Medicine, and has held several leadership roles at Weill Cornell, including Director of Undergraduate Medical Education in the Department of Emergency Medicine and Assistant Director of the Margaret and Ian Smith Clinical Skills Center. She brings deep medical experience and a commitment to patient and physician education. She continues to make significant academic contributions to the fields of medical education and Geriatric Emergency Medicine. Mary completed her undergraduate education at Princeton University and obtained her medical degree from Columbia University College of Physicians and Surgeons, graduating with honors from the AOA Medical Honor Society and the Gold Humanism Society. She served as Chief Resident of the Emergency Medicine residency program at NewYork-Presbyterian Hospital and completed a fellowship in Geriatric Emergency Medicine at Weill Cornell Medical Center.
Charles Hill
Charles Hill | Head of Product
Charlie leads the Product function at Summus and brings over 20 years’ experience in software product management and innovation. Prior to Summus, he served as Head of Product at TrademarkNow, a pioneering artificial intelligence legal-tech startup that was sold to Corsearch Inc. in 2020. Previously he led product development efforts at Gerson Lehrman Group and at Getty Images, developed an innovation-strategy consulting unit within Deloitte around The Innovator's Solution bestseller, and served as a Global Brand Manager at Activision Inc. Charlie holds an M.B.A. from Harvard Business School and an A.B. in Political Economy from Princeton University.
Liz Horgan
Liz Horgan | Chief Marketing Officer
Liz leads marketing for Summus and has worked across the healthcare industry for more than 20 years, with experience in healthcare technology, payers, and population health organizations both in the US and globally. Prior to joining Summus Global, Liz led the Care Engagement team in the Aetna/CVS Office of the Consumer. She has also built and led successful marketing teams for Silverlink Communications, a healthcare technology company serving payers and pharmacy organizations, as well as Health Dialog, a leading population health coaching company that was acquired by Rite Aid. Liz holds an A.B. from Harvard College.
Sanders DeNardi
Sanders DeNardi | Vice President of Engineering
Sanders is a founding member of Summus, and leads the engineering team. He has over 10 years' experience in software development spanning multiple industries. Prior to Summus, Sanders was a senior software engineer at Relationship Science, a platform allowing professionals to leverage their personal networks to connect with businesses and people, where he developed auditing tools and led the Android development team. Previously he served as a database engineer at S&P Capital IQ, developing internal data collection and ownership tools. Sanders holds a B.S. in Electrical Engineering from the University of Virginia.
Aftab Kherani, MD
Aftab Kherani, MD | Founder & Chairman
Aftab is Chief Medical Officer, Managing Director of Ajax Health and Operating Partner at Aisling Capital. Previously, he was an engagement manager at McKinsey & Company in the pharmaceutical, medical product, and private equity practices. Prior to McKinsey, Aftab was a Chief Resident in Surgery at Duke University Medical Center, and completed residency in general surgery. He completed a post-doctoral fellowship at Columbia University, College of Physicians & Surgeons as an organ procurement fellow. He received his M.D. from Duke University, and was a Howard Hughes Medical Institute research fellowship recipient. He earned his B.S. in Biology and A.B. in Economics from Duke, Magna Cum Laude, graduating Phi Beta Kappa.
Jennifer Kherani, MD, FACEP
Jennifer Kherani, MD, FACEP | Founder
Jennifer was previously an attending Emergency Medicine physician and Instructor of Medicine at NewYork-Presbyterian Hospital/Weill Cornell Medical College. She served as Chief Resident in her final year of training at the combined program of Weill Cornell Medical College and Columbia University's College of Physicians and Surgeons. Dr. Kherani received her M.D. from the Duke University School of Medicine. She completed a year-long post-doctoral research fellowship at Columbia University and received her B.A. in neuroscience from Colgate University. Jennifer spent a pre-doctoral year at Columbia conducting cardiac physiology research in the laboratory of Dr. Mehmet Oz, Vice Chair of Surgery.

Medical Advisory Board

Solomon Aronson, MD, MBA
Solomon Aronson, MD, MBA
Executive Vice Chair, Department of Anesthesiology. Director of Business Development, Duke Private Diagnostic Clinic.
Duke University School of Medicine
Robert S. Brown, Jr., MD, MPH
Robert S. Brown, Jr., MD, MPH
Director, Center for Liver Disease and Transplantation. Vice Chair, Transitions and Care. Interim Chief, Gastroenterology and Hepatology.
NewYork-Presbyterian Hospital, Weill Cornell Medical Center
John A. Chabot, MD, FACS
John A. Chabot, MD, FACS
Chief, Division of Endocrine Surgery. Executive Director, Pancreas Cancer. Vice President, Columbia Doctors. Professor of Surgery.
NewYork-Presbyterian Hospital, Columbia University Medical Center
Helena R. Chang, MD, PHD
Helena R. Chang, MD, PHD
Director, Revlon/UCLA Breast Center. Professor of Surgery.
Ronald Reagan UCLA Medical Center
Isaac George, MD
Isaac George, MD
Surgical Director, Structural Heart & Valve Center. Assistant Professor of Surgery, Cardiothoracic Surgery.
NewYork-Presbyterian Hospital, Columbia University Medical Center
Wayne Hellstrom, MD, FACS
Wayne Hellstrom, MD, FACS
Chief, Andrology. Professor of Urology.
Tulane University School of Medicine
Robert N. Hotchkiss, MD
Robert N. Hotchkiss, MD
The Anne and Joel Ehrenkranz Chair, Hand and Upper Limb Research. Medical Director, Innovation. Medical Director, Clinical Research.
Hospital for Special Surgery
James A. Lee, MD
James A. Lee, MD
Vice Chair, Surgery. Chief, Endocrine Surgery. Associate Professor of Surgical Oncology.
NewYork-Presbyterian Hospital, Columbia University Medical Center
Theodore Pappas, MD, FACS
Theodore Pappas, MD, FACS
Chief, General and Advanced Gastrointestinal Surgery. Vice Dean for Medical Affairs. Distinguished Professor of Surgical Innovation.
Duke University School of Medicine
Abtin Tabaee, MD, FACS
Abtin Tabaee, MD, FACS
Associate Professor & Associate Attending of Otolaryngology.
NewYork-Presbyterian Hospital, Weill Cornell Medical Center
Alon Zadok Weizer, MD, MS
Alon Zadok Weizer, MD, MS
Medical Director, Comprehensive Cancer Center. Associate Professor of Urology.
University of Michigan Health System
Tamara Wexler, MD, PHD
Tamara Wexler, MD, PHD
Director, Pituitary Center. Clinical Associate Professor, Department of Rehabilitation Medicine.
NYU Langone Medical Center
Peter G. Whang, MD, FACS
Peter G. Whang, MD, FACS
Associate Professor of Orthopaedics and Rehabilitation.
Yale School of Medicine
Michael J. Zinner, MD, FACS
Michael J. Zinner, MD, FACS
CEO and Executive Medical Director, Miami Cancer Institute. Moseley Professor of Surgery Emeritus, Harvard Medical School.
Baptist Health South Florida

Corporate Advisory Board

Dennis Purcell
Leadership and Senior Advisor, Aisling Capital. Former Managing Director of Life Sciences Investment banking at Chase Hambrecht & Quist.
Ayman Sabi
Leadership and CEO, SABI Medical Group. Former CEO White House / Black Market and National Retail Group.
Arif Nathoo
CEO and Co-founder, Komodo Health. Former Consultant, Medical Affairs Practice, McKinsey & Company.
Laura Waitz
Former Senior Managing Director and Global Head of Human Resources, The Blackstone Group.
Laurence Herman
General Counsel and Managing Director, Gerson Lehrman Group (GLG). Former Senior Vice President, Capital IQ.
Joshua Bilenker, MD
President and CEO, Loxo Oncology. Operating Partner, Aisling Capital. Former Medical Officer at the US Food & Drug Administration.
Robert Liander
Former Lead Database Architect, Capital IQ. Former CTO, Relationship Science.

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