Key People

Kim Browning, CHC, PMP, CHRS

Executive Vice President, Tabula Rasa HealthCare

With more than 30 years of experience, Kim Browning is known as a healthcare pioneer and innovator. She has served and provided leadership to the Individual, Commercial, Medicare, Medicaid, and Self-funded markets. During her tenure as the State Government Programs division head at Excellus BlueCross BlueShield, the plan was ranked #1 in New York and #3 nationally for Medicaid contractors in US News & World Report’s 2009 rankings of health plans. In addition to her leadership roles at several BlueCross BlueShield plans, Ms. Browning has served as COO of a Third Party Administrator, Executive Director of a community health plan, and as Executive Vice President of Cognisight, a national risk adjustment vendor. She joined Tabula Rasa HealthCare in 2018 where she oversees Capstone Performance Systems and Peak Health Management Services, a Capstone offering. An author of several white papers on risk adjustment, Ms. Browning is a frequent speaker on the topic at industry meetings and often lectures at Rochester Institute of Technology and the State University of New York at Geneseo.


Kim Browning

George W. Brett, MD  

Senior Vice President, Consulting Services/ Chief Medical Officer

Dr. Brett has more than 30 years of experience in geriatric medicine and long-term care. Prior to joining Capstone Performance Systems in 2014, he served as the medical director for LIFE programs at Lutheran Senior Life in Western Pennsylvania. (LIFE  — Living Independence for the Elderly — is part of the National PACE Program.) As a private practitioner for more than two decades, Dr. Brett specialized in internal medicine and geriatrics and served as medical director for several long-term care facilities, hospice organizations, and PACE. His work with PACE led to his interest  and expertise in Medicare risk adjustment. He is a frequent presenter on topics including polypharmacy in the elderly and risk adjustment.


George W. Brett, MD

John C. Stolze

Senior Vice President, Planning, Management, and Development

John Stolze has more than 25 years of experience leading, directing and developing primary and multi-specialty physician practices and groups; clinics; managed care contracting associations; care management teams; and community-based delivery systems. He has an in-depth understanding of the operations side of PACE, accountable care organizations and physician groups with a strong suit in value-based care.  As director of operations and population health for a physicians’ organization in St. Louis, MO, he established a population health management division and collaborated with the St. Louis Physician Alliance (SLPA), to create and lead a Medicare ACO post-acute care management program and a preferred facility network. John joined Capstone in 2017 where he oversees the Planning, Management and Development unit and the PACE Technical Assistance Center.


Capstone Performance Systems

David Wilner, MD, FACP, AGSF

Senior Medical Consultant

 Dr. David Wilner has extensive experience in geriatric medicine. A clinical professor at University of Massachusetts Medical School, Dr. Wilner previously served as medical director and vice president of Summit ElderCare, a PACE program, and Fallon Health and as coordinator of geriatric medicine training at St. Vincent’s Hospital in Worcester, Mass. He is a past member of the National Pace Association (NPA) board of directors and former chairman of the NPA’s Primary Care Committee. Dr. Wilner is board certified in geriatric medicine, hospice and palliative medicine, and internal medicine. 
David Wilner

Matthew Zimmerman

Director, Client Success/ Risk Adjustment Consultant

Matthew Zimmerman plays a key role in providing services to support clients through meaningful analyses of their data. He has extensive experience in Medicare Part D management and PACE, previously managing all risk adjustment processes for one of the largest PACE organizations in the country. Matthew has managed and developed internal process standards, policies and procedures, regulatory requirements, and adaptations to CMS changes. Additionally, he was responsible for the annual CMS-sponsored HOS-M survey used for development of PACE Frailty Factor.

Matthew Zimmerman

Angie Hlad, C.R.N.-C.

Director, Coding and Auditing

Angie Hlad has an extensive understanding of ICD10 coding and HCC reimbursement and more than ten years of nursing experience.  She previously served as a reimbursement coordinator for a PACE program, where she focused on coding as well as on educating providers and staff on reimbursement principals. She also spent five years as a registered nurse assessment coordinator, and is a current member of The Nursing Honors Society.

Angie Hlad, CRN-C