David SeligmanDavid Seligman, Chairman and Chief Executive Officer
Since 1997, David Seligman has led Best Doctors growth strategy. David has 22 years of broad management and strategic experience in the healthcare sector including market development, mergers and acquisitions, and performance turnarounds. Prior to joining Best Doctors in 1997, David was a Director at the corporate level at Fresenius Medical Care. David graduated valedictorian from Thunderbird with a Masters in International Management and from UCLA with a degree in Economics.

John VarvarisJohn Varvaris, President and Chief Operating Officer
John Varvaris directs the execution of Best Doctors international strategy and manages the Company’s worldwide operations and shared services. John has helped Best Doctors manage its dramatic growth since joining the Company 4 years ago. John has over 30 years of business experience including positions as a Partner at Ernst and Young, LLP and, Senior Vice President & CFO at Old Mutual’s US Life Business. John graduated cum laude from Shippensburg University with a BS in Business Administration and holds a Masters of Science in Finance from Loyola College in Maryland, where he has taught graduate and undergraduate courses as an adjunct professor.

Gary BakerGary Baker, Chief Financial Officer, CPA, CMA
Gary Baker is responsible for the financial, auditing and risk management activities of the company. Gary brings more than 30 years of diverse experience to the CFO role in planning and analysis, business advisory capacities, accounting, auditing, and strategy development, for firms including multi-national companies, healthcare providers, payers, financial services firms and professional services organizations. Most recently, Gary was Chief Operating Officer at a large health services firm, where he was responsible for both operational and financial performance. He has also served in senior executive positions with a healthcare-related start-up firm, a $40 million venture backed professional services firm serving the education industry, a $52 million healthcare utilization management organization and several payers with responsibility for profitability of organizations with revenues from $2 billion to $4 billion. Gary attended Loyola University in Maryland, from which he graduated summa cum laude with a Bachelor's degree in Accounting.

MarkMark Crockett, MD, Chief Medical Officer & Senior Vice President of Strategy and Innovation
Mark is a pioneer in the healthcare industry’s accountable care movement with extensive knowledge in the fields of emergency medicine, medical informatics and systems architecture. Prior to taking the leadership role at Best Doctors/Rise Health, Mark was Chief Medical Officer at OptumInsight’s Accountable Care Solutions. His systems technology expertise helped drive product development at companies such as Ibex Healthdata Systems, where he was CEO and later president of Emergency Care for Picis. Mark earned his MD at the University of Illinois College of Medicine after graduating Wheaton College. He practices emergency medicine at Advocate Good Samaritan Hospital in Downer’s Grove, Ill and is a published author and a fellow of the American College of Emergency Physicians.

Nancy PowersNancy Powers, Senior Vice President, Global Business Development for Services
Nancy oversees the U.S. and Global Sales, Account Management and Marketing teams and also leads global business development efforts for Best Doctors' services. Nancy has 25 years experience in sales and sales leadership in the health care arena. Her experience encompasses co-founding CorSolutions, formerly one of the largest Disease Management organizations. Nancy most recently held the position of VP of sales and account management at HMC, a division of Wellpoint, where she built the sales team, and drove over $18 million in sales in 2 years. Nancy holds a BS degree from Syracuse University.

Elizabet NarciandiElizabet Narciandi, Senior Vice President, Global Insurance Operations
As Senior Vice President of Global Insurance Operations at Best Doctors, Elizabet Narciandi promotes a unified global strategy for insurance operations. Elizabet joined Best Doctors in October 2010 and held the position of Vice President of Operations for the Direct Insurance Division, managing and directing various facets including but not limited to Provider Services, Quality Control and Best Doctors Prepaga Company in Ecuador. Prior to joining Best Doctors, she led the Information Technology Team of Bupa Latin America for 11 years as IT Director, promoting efficiency and effectiveness in the organization. Elizabet holds an undergraduate degree in Computer Sciences and a Masters degree of Science in Management Information Systems from Florida International University. She is also a Microsoft Certified Professional and holds a Project Manager Certification from PMI.

Pia Malem ChristoffersenPia Malem-Christoffersen, Senior Vice President, Sales and Marketing
As Senior Vice President for Sales and Marketing Pia Malem-Christoffersen leads the definition and implementation of the sales and marketing strategy of the insurance business in Latin America & the Caribbean in Best Doctors. Pia joined Best Doctors in 2009 and she and her team has contributed to the extraordinary growth in the insurance business, optimization and expansion of the distribution channels and new markets. With her 20 plus years of experience in sales management of medical insurance in Latin America & the Caribbean she has worked with companies such as International Health Insurance danmark a/s and BUPA Latin America. Pia’s career started in Denmark but her linguistic and commercial skills gave her the opportunity to pursue her career in the international arena, working in various countries such as Spain, France and the United States which has enforced her multi-cultural capacity. Pia graduated from the Copenhagen Business School and has an extensive curriculum through leadership programs. She has also served on the Board of Directors for International Health Insurance danmark a/s.

ConnieConnie Moser, Senior Vice President of Product & General Manager for Rise Health
Connie Moser is the General Manager of Rise Health, with responsibility for building client relationships and managing company growth. Connie joined Best Doctors/Rise Health from McKesson, Inc., where she built a proven track record in a variety of executive positions. Most recently, she was McKesson’s Vice President of Enterprise Intelligence and General Manager of Strategic Intelligence where she doubled the healthcare analytics business with over 1,000 healthcare facilities and was a key player in driving the overall population health strategy. She also recently held the position of co-chair of the Data and Analytics Workgroup for eHealth Initiatives, an industry nonprofit working to improve healthcare information technology. Connie holds a BA from Ripon College and earned an MBA from Lake Forest Graduate School.

Jeff HJeff Harner, Chief Analytics Officer
Jeff brings a lengthy career in health analytics and informatics to Best Doctors/Rise Health. Previously, Jeff was the Associate Vice President of Performance and Outcomes for Nationwide Better Health where he was responsible for analyzing outcomes across their business portfolio including Medical Management, Health Promotion, Disability Management, Absence Management, and Population Risk Assessment. His work focused on providing information-based business intelligence and applying information and analytics to solve specific problems for clients and business leaders. Prior to his work with Nationwide Better Health, Jeff served for five years as the Vice President of Clinical Informatics at Cigna HealthCare. His experience also includes work as the CFO for HealthNet of Southern California. Jeff holds a degree in healthcare administration from Providence College and a masters in healthcare management from Rensselaer Polytechnic Institute.

MartinMartin Luethi, PhD, Chief Information Officer
A native of Switzerland, Martin brings more than 12 years of commercial software development management experience to Best Doctors/Rise Health. Before joining Best Doctors/Rise Health, he was a Senior Director at Optum, a technology and services company owned by UnitedHealth Group, where he oversaw software development of an EMR product line. Previously, Martin held several roles at Picis, a global provider of information solutions for high-acuity care areas, including positions in Architecture, Development, and Quality Assurance. Martin is a frequent speaker at international technology and quality conferences. His interests include software development methodologies, information systems architectures, and human computer interaction and usability. Martin received his PhD from the Institute of Information Systems, Department of Information Engineering of the University of Bern, Switzerland.

Dr. Lewis LevyLewis Levy, MD, FACP, Senior Vice President, Medical Affairs & Chief Quality Officer
Lew Levy, MD, FACP is the Senior Vice President, Medical Affairs and Chief Quality Officer at Best Doctors. He provides medical leadership to the clinical operations team to deliver the highest quality clinical information on diagnosis and treatment to members and their treating physicians. He has over 25 years of clinical experience as an internist at Harvard Vanguard Medical Associates in Boston. Dr. Levy also has an extensive teaching career as a preceptor in the Internal Medicine Residency Program at Brigham and Women's Hospital and is an instructor at Harvard Medical School. He continues to practice primary care internal medicine and has participated in pioneer ACO, HMO and FFS arrangements.

Dr. Levy earned his medical degree from the University of Rochester School of Medicine and Dentistry and completed his residency in Internal Medicine at the Graduate Hospital of the University of Pennsylvania.

Kelly BlissKelly M. Bliss, Vice President of Human Resources
Kelly M. Bliss, Vice President of Human Resources joined Best Doctors in 2014 with over 20 years of Human Resources experience within a variety of industries.  Kelly has held senior leadership positions within several high-growth organizations including a large global technology company and a prominent architectural design firm.  At Best Doctors Kelly is responsible for the Global HR strategy including HR Delivery, Organizational Development, Talent Acquisition and Talent Management.  She is passionate about building high functioning leadership teams and aligning organizational culture with commercial goals and purpose.  She holds a BA in Industrial Psychology from Nichols College and maintains the designation of (SPHR) as a certified Senior Professional of Human Resources by the HR Certification Institution. 

Sue LearySue Leary, Vice President of U.S. Operations
As Vice President for US Member Services and Operations for Group Health business, Sue leads the team responsible for connecting members to medical specialists who can best address each member’s personal health challenge. Member satisfaction and clinical quality are key objectives, ensuring every member experiences a positive, memorable interaction with Best Doctors. Sue has over 20 years of experience in Operations including: customer service, eligibility, enrollment, data analytics, vendor management and consumer driven healthcare. Prior to joining Best Doctors, Sue was the Senior Director for Service Strategy and Engagement at Blue Cross Blue Shield of Massachusetts responsible for building strategies to enhance the overall customer experience. During her tenure she was the Director of Member Service and drove results for outstanding customer service ratings, world class call center achievements, new training and quality programs and implemented a new service model and tools to support member experience. She holds a bachelor’s degree from Emmanuel College.

William WenWilliam Wen, Vice President of Corporate Development
William Wen is the Vice President of Corporate Development for Best Doctors where he is responsible for corporate strategy and mergers and acquisitions. He has successfully completed over 25 acquisitions in his career. Prior to his role at Best Doctors, Mr. Wen co-founded me2me, a developer of speech technology based clinical documentation solutions for electronic medical records. Mr. Wen has also held senior positions at Nuance Communications and Xerox where he was responsible for corporate development, acquisitions, strategic planning and corporate budgeting. Mr. Wen has a BA from the University of Pennsylvania and an MPPM from Yale University.

Nestor TarragonaNestor Tarragona, MD, Medical Director, Direct Insurance
As the Medical Director of the Direct Insurance Division, Dr. Tarragona is focused on medical strategy and improving the functionality and integration of Best Doctors products and services. Prior to formally joining Best Doctors in 2009, Dr. Tarragona trained at Harvard Medical in 2002 with Best Doctors’ founding physicians. His impeccable ability at problem solving and extensive medical knowledge made him an ideal fit with Best Doctors, where he continues to promote medical excellence in the industry. Dr. Tarragona graduated from the University of Buenos Aires in 1999, and completed his residency at the University Hospital. More recently, Nestor completed his second residency training in Internal Medicine at the New England Medical Center, Tufts University.