Our Team

Si Nahra, PhD, President

Dr. Nahra, President and Co-founder of Health Decisions, Inc., is a respected advisor to employers, insurers, health maintenance organizations, self-funding administrators, and Blue Cross Blue Shield plans.

His professional experience in the US health care system began in the early 1970s.  It spans work for three states and the federal government where he worked as a program review and audit specialist.  Within the private sector Dr. Nahra worked with non-profit health systems and business coalitions as a director of research and policy analysis. 

Since 1985 with the founding of Health Decisions, Inc., he has worked in the group health market where he has delivered hundreds of successful health plan audits.  Under his leadership, Health Decisions has led the market in auditing innovations.  The Company was one of the earliest adopters of 100% claim audits using data mining technologies.  It set precedents for the inclusion of recovery collections as a part of a modern claim audit.  Health Decisions introduced enrollment auditing to its clients 15 years before its more general adoption as a fundamental part of benefits auditing.  The firm develops new audit modules each year.  Health Decision's software suites continue to set new audit performance standards.     

Dr. Nahra has authored numerous pieces on various aspects of health care auditing that will also be featured on his blog "Si's Library."  Most recently, he authored the chapter on Health Benefits Auditing in the book "Cost Recovery: Turning Your Accounts Payable Department into a Profit Center" by Richard B. Lanza, CPA, CFE, PMP. 

Si has hosted numerous webinars covering various topics related to auditing group health expenses.  He has spoken at numerous conferences and is frequently invited to host training and background sessions for health care advisory, brokerage and consulting organizations. Dr. Nahra has a bachelor’s degree from Colby College and a Ph.D. in political science from Michigan State University.


Judy L. Mardigian, Chief Executive Officer

Ms. Mardigian, Co-Founder and CEO of Health Decisions, Inc., heads the firm’s finance, enrollment auditing service, and claim recovery service activities. Her ability to understand employers’ challenges in oversight of health plan administration led her to develop the methodology for the company’s Comprehensive Medical Claims Audit and Enrollment Audit Services. Ms. Mardigian is currently the Audit Practice Leader for the firm’s Enrollment Reconciliation Audit Service, conducted for large complex employer-sponsored health plans and trusts.

Prior to founding Health Decisions, Ms. Mardigian was a Senior Account Manager for MEDSTAT Systems where she managed the service delivery for Fortune 500 clients, such as General Electric, TWA, and B.F. Goodrich. She is also past President and a twelve-year elected board member for the Plymouth-Canton Community Schools, the fourth largest district in the State of Michigan. Judy has a bachelor’s degree in social science from Michigan State University where she also completed her master’s coursework in health communications.


Don Johnson, Manager of Software Services

Mr. Johnson leads Software Engineering and Development for Health Decisions. In this capacity, he is responsible for the constantly evolving software that keeps Health Decisions’ technology on the leading edge. Prior to joining Health Decisions in 2016, Don completed a project to develop software systems to import, track, report, and transmit Affordable Care Act compliance data to the IRS for municipalities and other private sector organizations. Mr. Johnson has two bachelor’s degrees from the University of Detroit Mercy.




Leslyn Rank, Eligibility Audit Practice Leader

Ms. Rank has been with Health Decisions since 1997, and has been managing Dependent Eligibility Audit projects for the past twelve years. She also leads the design of the communication and survey forms. In addition to her strong background in finance, she has led the development and refinement of the dependent verification mailing process. She earned a Bachelor of Fine Arts from Grand Valley State University.


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