MedEncentive is headed by experienced and knowledgeable leaders

Leadership, Founders, Board Members and Advisors
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Jeffrey C. Greene - CEO, founder and Board Chair - Greene is an entrepreneur, award-winning innovator, population health expert, and human factors engineer.  He is the inventor of the “Trilateral Health Accountability Model,” a web-based system designed to improve health and lower costs, for which he holds three U.S. patents and a Canadian patent.  


From 2005 to 2018, Greene's inventions earned him the Journal Record Innovator of the Year award an unprecedented 7 times.  Greene was also named Risk Innovator of the Year in 2013 by Risk and Insurance Magazine.


Greene is well-known for his efforts to align incentives to improve health and healthcare in ways that lowers costs, often referred to as the “Triple/Quadruple Aim.”  He is also known for his interests in promoting health literacy, a strong determinant of health and healthcare costs. As a result of these efforts, in 2018, Greene became the first non-physician, non-public official named Patient Advocate of the Year by the Oklahoma Academy of Family Physicians.


In 2019, Greene led a distinguished group of researchers and clinicians in publishing a study in the peer-reviewed Journal of Medical Internet Research, entitled Reduced Hospitalizations, Emergency Room Visits, and Costs Associated with a Web-Based Health Literacy, Aligned-Incentive Intervention: Mixed Methods Study. At the time of its publication, this was one of the first, if not the only study of an innovation that solved the Triple/Quadruple Aim, in a general population, considered by experts as the "holy grail" of health reform. 

Prior to starting MedEncentive, Greene founded CompOne Services, which be­came one of the largest medical practice management and billing firms in the coun­try.  While leading CompOne, Greene served as guest instructor in the Department of Family Medicine at the University of Oklahoma, for eighteen years.  During his teaching tenure, Greene co-author the text “Practice Management for Family Physician Residents,” published by the American Academy of Family Physicians.


Greene is a Certified Executive through the American College of Medical Practice Executives. He serves on the Advisory Boards of the University of Oklahoma’s School of Industrial and Systems Engineering and the OU Spike Club.  He has also served in leadership positions and on boards of a number of other professional and charitable organizations throughout his career.


Greene attended the University of Oklahoma on an athletic scholarship, where he was captain of the track team and a record-setting hurdler. He holds a bachelor’s degree in industrial engineering from OU.  He served as a reserve officer in the U.S. Army Corp of Engineers for fifteen years. He and wife Debby live in Norman, Oklahoma. They are the proud parents of adult children Jess and Sarah Beth.


Susan L. Chambers, M.D.- Chief Medical Officer, co-founder, and Board Member - Dr. Chambers is co-founder and officer of Oklahoma City Gynecology and Obstetrics, L.L.C., which co-owns Lakeside Women's Hospital. Dr. Chambers is also, co-founder, medical director, and Board Member of MedEncentive, LLC.

A graduate of Southern Methodist University and the University of Oklahoma’s College of Medicine, Dr. Chambers completed residency training at University of Oklahoma 's College of Medicine, serving as Chief Resident.

Dr. Chambers is a Fellow of the American Board of Obstetrics and Gynecology and recertified four times. Dr. Chambers is a member of American Medical Women's Association, Oklahoma County Medical Society, Oklahoma State Medical Society, and American Medical Association. Dr Chambers has been or is currently Chairwoman/ President of Baptist Medical Center's Perinatal Committee, Western OK Chapter March of Dimes, Central Oklahoma Physicians Alliance (COPA), and March of Dimes Walk America. She also serves on the Advisory Board, Oklahoma Chapter Susan G. Komen Foundation and the Board of Directors, Oklahoma Chapter American Red Cross. Dr. Chambers has a special interest in caring for people in underdeveloped countries. She is past Chairwoman and current member of the Board of Trustees, World Neighbors. Dr. Chambers’ active participation in World Neighbors has taken her around the world several times caring for the sick and injured.

For her numerous accomplishments, charitable activities, and business successes, Dr. Chambers was selected Oklahoma's Woman of the Year in 2002. 


David W. Parke II, M.D. - co-founder- Dr. Parke, a founding member of MedEncentive, is executive vice president and CEO of the American Academy of Opthalmology, the world’s largest ophthalmology organization, with 30,000 members and offices in San Francisco and Washington, D.C.

Prior to assuming this role, Dr. Parke served for 17 years as president and CEO of the Dean McGee Eye Institute and Edward L. Gaylord professor and chair of the department of ophthalmology in the University of Oklahoma College of Medicine. The McGee Eye Institute has more than 300 faculty and staff and consistently ranks among the top institutions nationally in terms of NIH vision research grant support.

A practicing ophthalmologist with subspecialty focus in retina/vitreous, Dr. Parke served as president of the Academy in 2008. He is a fellow of the Academy and received its Honor Award in 1989, its Senior Achievement Award in 1998 and its Life Achievement Honor Award in 2009.

A graduate of Phillips Exeter Academy, Stanford University and an AOA graduate of the Baylor College of Medicine, Dr. Parke completed residency training at Baylor College of Medicine, serving as chief resident. He then completed two years of fellowship training in diseases and surgery of the retina and vitreous. His professional and scholarly activities have focused on that subspecialty and on medical education and biomedical organizational leadership and development.

Dr. Parke’s other past medical leadership positions have included serving as president of the Association of University Professors of Ophthalmology and director of the American Board of Ophthalmology.

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David D. Le Norman - Senior Advisor and Board Member - Le Norman is a highly successful oil and gas entrepreneur. He is currently the founder and managing partner of Reign Capital Holdings. After over three decades working in the industry, his experiences range from various engineering and business development roles with Texaco to creating and carrying out successful build and monetization strategies across multiple companies: Crusader Energy Corporation, Crusader II, Crusader III, White River Energy LLC, TLP Energy LLC, Le Norman Partners LLC, Le Norman Energy Corp, Knight Energy Group, and Knight II.


Le Norman also serves as Chairman of the Petroleum Alliance of Oklahoma and Vice Chair on the OERB’s Board of Directors. He is committed to working with Oklahoma’s elected officials and policymakers to ensure that the state and its largest industry continue to thrive. Another passion point of Le Normans is philanthropy. He supports a wide variety of charitable organizations both locally and nationally.


Le Norman holds a B.S. in Petroleum Engineering from the University of Wyoming, master’s work in Chemical Engineering at Oklahoma State University and an M.B.A. from Oklahoma City University.


Jeff Wills - Senior Advisor and Board Member - Jeff has been redefining the standard of care in home health for over 20 years. He founded Canadian Valley Medical Solution (CVMS) in 1991 as a provider of medical equipment and infusion services. The company grew to become the largest independent home healthcare company in the state of Oklahoma and was acquired in 2006 by a Fortune 50 company in the medical industry. CVMS enjoyed a pristine reputation as a result of placing a strong emphasis on patient needs thereby ensuring the continuum of care.  Just as was the case with CVMS, Jeff began OptionOne based on the perception that the Midwest was in great need of a patient-focused, progressive healthcare provider.


Jeff has been a driving force in developing the homecare industry through the assumption of numerous leadership roles in homecare organizations, such as the MED Group, the American Association of Homecare and Home Medical Equipment and Respiratory Therapy Advisory Council. In addition, Jeff has acted as a business consultant to business owners all over the country. 

Jeff holds a Bachelor’s degree in Accounting and Computer Science from Southwestern Oklahoma State University.


James L. Dempster - Business Development Director - Dempster served as an Executive Director of CompONE Services, Ltd from 1999 to 2004. At CompOne, Dempster is credited with building Physician Direct, an Oklahoma-based PPO, from scratch to a provider network comprised of 4,600 physicians and 120 hospitals. In addition, Dempster directed Physician Credentials Verification Services, a primary source verification service, located in Tulsa, Oklahoma, and CompONE’s Managed Care Administrative Services.

With more than 20 years of experience in the healthcare industry, Dempster has served in various healthcare positions including Regional Vice President of CCN and Director of PPO Operations for CommunityCare Managed Health Plans in Oklahoma. Active in the managed care industry, Dempster is a licensed insurance broker and a past member of the Board of Directors for the State Health Underwriters Association of Oklahoma, a past Board member of the Council of Medical Services for the Oklahoma State Medical Association, and a member of the Oklahoma State Coverage Initiative Benefit Structure Workgroup.

Dempster received a bachelor’s degree in management and marketing from Kansas State University.

Robert W. Purser - Director of Software Development and Information Technology- Purser is the chief architect of the MedEncentive website applications. He also created and maintains the Company’s information technology and telecommunication infrastructure, including the Company’s data security systems.


After a stint in the U.S. Coast Guard, Purser joined Telefora as a software designer in charge of quality assurance and testing. Purser then joined Oklahoma City Realtor Association as the lead software developer and database administrator. He started his own consulting firm, Oklahoma Web Solution, before teaming with Greene, Winburn and Dempster at CompONE Services to launch MedEncentive.

Advisors - The MedEncentive, LLC management team is augmented by a cadre of highly respected advisors including: attorney Stephen Jones, patent attorney Larry Grable, CPA Chuck Rahill, and special advisor Ken Schuerman.

In Memorium

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H. Clifford Winburn, Jr., JD, CPA - May 8, 1943 - December 21, 2019 - Winburn was a co-founder of MedEncentive.  He served as the Company's Chief Financial Officer, and was an active member of the Board of Directors, until his death.


In 1987, Winburn partnered with his brother-in-law and MedEncentive CEO, Jeff Greene, to form CompOne Services.  This firm grew to become one of the largest medical practice management and billing companies in the country. In 2003, while still at CompOne, Winburn and Greene formed Medical Moguls.  This partnership’s principal holding was Breast MRI of Oklahoma, a state-of-the-art diagnostic facility led by noted breast health surgeon and best-selling author, Dr. Alan Hollingsworth. Winburn served as the facility's financial officer.


A year after leaving CompOne in 2004, Winburn joined Greene, Dr. Susan Chambers, and Dr. David Parke in forming MedEncentive.

Winburn started his career at Arthur Young and Company, as a certified accountant and tax manager.  Winburn served as Chief Financial Officer and Treasurer of Cotton Petroleum from 1978 through 1986.

Winburn was an avid golfer, having played rounds in all fifty states. He also loved following his OU Sooners in all sports.  Winburn served in the U.S. Army Reserve as a medic. He was a spiritual leader in his community, serving as the head of Tulsa's Bible Study Fellowship for over twenty-five years.  He was a loving husband to his college sweetheart, Diana (“Greenie"), and father to daughters Megan Winburn and Abigail Davis.   

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