We are not just a billing company.

Supported by our core values of integrity, accountability, quality, transparency, and results, Medac provides comprehensive anesthesia business and technology solutions that improve the lifestyle, productivity and profitability of our clients and enhance their focus and ability to provide quality anesthesia care, better anesthesia outcomes, and greater patient satisfaction.

Bijon EDIT

Bijon Memar

Founder / CEO

Bijon has over 30 years of experience in the healthcare industry, first as a practice administrator for Gwinnett Family Medicine in Atlanta, Georgia, and then as Vice President for Medical Bureau, Inc., a medical billing service.  The son of a physician and experienced in the medical industry, he saw the need for comprehensive business solutions for hospital-based specialties, founding Medac in 1992.  Bijon is focused on bringing value to anesthesia physicians by building a unique partnership based on integrity and trust.  He is a graduate of Georgia College and State University with a Bachelor of Business Administration.

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Bellinger Moody


Bellinger has over 25 years of experience in the healthcare industry and 19 years of experience in anesthesia and pain management billing, coding, reimbursement, education, and management.  Through Bellinger’s experience in auditing and consulting for anesthesia and pain practices across the country, he has gained many valuable insights into anesthesia and pain-specific coding and compliance pitfalls.  These can include common documentation problems that affect reimbursement, CRNA coding issues and how they vary between states, managed care contract issues that affect reimbursement, unique anesthesia and pain coding techniques that increase reimbursement, cardiac anesthesia coding compliance, critical care coding for maximum compliance and reimbursement.  Bellinger is also very experienced in anesthesia billing rules and exceptions for Medicare, Medicaid and private payers, teaching facility documentation rules and coding techniques for maximum compliance and reimbursement, as well as policy variability between different Medicare carriers and private payers. Bellinger graduated from Morehouse College with a Bachelor of Business Administration.  He is a nationally Registered Health Information Administrator (RHIA) through the American Health Information Management Association (AHIMA), a nationally Certified Professional Coder (CPC) through the American Academy of Professional Coders (AAPC), a nationally Certified Compliance Professional (CCP) through the Healthcare Fraud & Abuse Compliance Institute, an AAPC Approved Professional Medical Coding Curriculum (PMCC) Coding Instructor and a member of the Medical Group Management Association (MGMA) and the Anesthesia Administrator’s Assembly (AAA). read more...


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M Weistein | Medac Anesthesia Business Partners

Mark Weinstein

VP of Operations

Mark has more than 25 years of experience in the healthcare industry, both private and public sectors. In the private sector, Mark worked as a financial manager and administrator in the clinical laboratory industry. He directed multi-site operations for billing and revenue cycle management, the development of work flow processes, accounts receivable system implementations, and regulatory compliance… Mark has additional experience in budgeting, analysis and reporting, strategic planning, and managed care contracting. As an administrator in the military health system, Mark operated and led a variety of activities to include financial management, human resources, medical material, patient administrative services, and more, in hospital and clinic settings. Mark culminated his military service as the Executive Director of an overseas managed care program. Mark holds a Master of Public Administration (Health Care Concentration) from The American University and is a Fellow in the American College of Healthcare Executives. read more...

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Lee Bodie

Director of Operations

Matthew Harrison

Chief Compliance Officer

Matthew brings to Medac a unique blend of experience in compliance program management, business process analysis, project management, and agile software development.  He has extensive knowledge of compliance issues related to anesthesia and pain management billing.  Matthew has spent most of his career specifically in the areas of anesthesia billing compliance on both the provider and payer sides.  Prior to joining Medac, Matthew served as the Director of Client Operations at inVentiv Medical Management, where he designed the anesthesia and pain management claim processing policies and systems, played an integral role in design of a claims surveillance engine to identify opportunities for claims savings and patient care management across all specialties, and managed the implementation of a sub-contract for a regional Recovery Audit Contractor (RAC).  Matthew received his Bachelors of Science in Health Informatics from the Medical College of Georgia in 2005.  Matthew is a Registered Health Information Administrator (RHIA), Certified Professional Coder (CPC), and Certified Compliance Professional (CCP).

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Hal Nelson

VP, Compliance

As a nationally known expert in the field of anesthesia and chronic pain management, Hal brings a variety of expertise to Medac clients in helping medical practices resolve anesthesia coding, billing and compliance challenges. His experience navigating through Medicare billing regulations, anesthesia and pain coding, payer audit defense and physician documentation analysis for compliance ensures that Medac clients have a safety net for these challenging issues.

Hal was awarded the Certified Professional Coder designation in 1998, and has previously taught coding certification classes collegiately in Atlanta, GA. He has 25 years of experience on both the payer and billing side of the business, and is one of the compliance executives in charge of supporting auditing and compliance initiatives.  He has extensive knowledge of compliance issues related to anesthesia and pain management billing.


Jack Sunderman

Chief Technology Officer

Jack comes to Medac with over 20 years of diversified expertise in project management, software development, technology infrastructure, data architecture, and telecommunications.  His record of success was proven in creating robust technology solutions in a variety of healthcare settings, most recently at Wellmont Health System in Kingsport, TN, which included 6 full-service hospitals with a staff of 6,500 employees and over 600 physicians.   Jack has a track record of providing strategic direction of technology initiatives by building, managing, and promoting multi-national teams. Jack received both his Bachelors and Master’s Degrees  in Computer Science from the University of South Carolina.

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Jun Espino

Dir. Technical Services

Jun has over 20 years of information systems expertise including a record of success in leading major, complex business productivity application development projects with a strong focus on .Net and Microsoft Technology stack.  He has several years of management and technical consulting experience as well as 8 years of accounting, budgetary control, and auditing experience. He received his Bachelor’s Degree in Accounting at the University of Santo Tomas, his Master’s Degree in Computer Information Systems from Georgia Southwestern State University and earned his CPA certification in the Republic of the Philippines.

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Bryan Hemerka

Dir. Information Services

In 2010, Bryan joined the Information Technology (IT) department at Medac where he specializes in project management, data center & cloud infrastructure management, reporting, business intelligence, database management, and interface initiatives. Bryan has almost 10 years of healthcare related Information Technology experience gained from his involvement with companies like Coventry Health Care (currently Aetna) and the University of Pittsburgh Medical Center’s Insurance Services Division. Bryan received both his MBA and Master’s Degree in Information Systems Management from Duquesne University.

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Alan Putman

Dir. of IT Data Services

Alan comes to Medac with over 25 years of information systems experience including a record of success in software development and project management.   His record of success was proven in domestic and international projects that supported a variety of operations specializing in logistics, automotive, public utility and household goods for both small and large organizations.   Alan received his Bachelor’s Degree in Computer Science at the University of South Carolina and his Master’s Degree in Computer Science from Clemson University.​


Janet Seigler

Chief Financial Officer

Janet has over 30 years’ experience in accounting and finance.  She has an extensive background in treasury, tax, audit, financial reporting, budgeting, payroll and benefit plans.  She has managed financial reporting and operations for multiple companies in the private sector.  She has been with Medac for over 9 years.  As Medac’s Chief Financial Officer, Janet is responsible for all financial operations and 401K administration and benefits, as well as managing payroll, accounting and financial reporting for our Practice Management clients.


Jimmy Patrick

Senior Vice President

Jimmy has more than 18 years of experience in the healthcare industry.  First as the owner of MitPat, a medical billing service, and then bringing his knowledge and experience to Medac to focus exclusively on anesthesia and pain management billing systems and processes.  His thorough understanding of anesthesia billing operations, provider fee schedules, collections procedures, billing system review, practice operation assessment and identifying and solving medical reimbursement problems have allowed him to seamlessly transition over 200 groups to Medac.  His extensive knowledge of our Kam Technologies system is invaluable in the presentation of our services at conferences and client meetings, as well as educating clients to use our reporting tools.


Christine Wilie

Vice President, Business Development

Christine Wilkie has over 20 years’ experience in the anesthesia revenue cycle management business, with specific concentration in marketing and business development.  She has a BA degree in Communications from the University of Georgia. As VP of Business Development for Medac, over the past 20 years, Christine has successfully added over $20 million in additional business to the Medac client portfolio.  Based on her in-depth knowledge of the anesthesia marketplace, she continues to cultivate and develop excellent business relationships.


Gary Keeling

Executive VP, Practice Management & Finance

Gary comes to Medac with a broad range of experience in financial and practice management including: MSO structure development; stipend/subsidy negotiation and analysis; profitability analysis of new and existing ventures; payer contracting and impact analysis, etc. Most recently, Gary served as Eastern Regional Vice… President of Anesthesia Services for McKesson where he was responsible for the management of 170 anesthesia clients.  He is well-versed in billing and collections management, hospital and facility contracting, development of governance structures, financial analysis, tax structures, and short and long term strategic planning.  Gary is a Certified Public Accountant and has a Master of Business Administration from Duquesne University. read more...


Jerry O’Leary

Senior VP, Practice Management

Jerry serves as a Senior Vice President of Practice Management and Managed Care and is responsible for ongoing negotiations with managed care companies for Medac clients. He ensures that client contracts with managed care companies meet all applicable guidelines and regulations.  Jerry also supports Medac’s practice… management clients – evaluating and negotiating hospital contracts, strategic planning, designing compensation formulas and fringe benefit packages, as well as interfacing with other practice advisors.  Jerry has over 35 years of experience in medical administration, overall practice management, managed care, and management services to hospitals and physicians. He has 20 years of experience in anesthesia and pain management.  Jerry is a member of Medical Group Management Association – Anesthesia Administrative Assembly and has numerous publications in medical journals.  He has a Master in Business Administration (health administration major) from Temple University. read more...


Nick Mareletto

Senior VP, Practice Management

Nick has over 30 years of experience in healthcare finance and administration, practice operations and development, and hospital and managed care contracting. His perspective is unique as a result of his background in both insurance and healthcare administration.  Nick was Vice President for Prudential’s HMO…  subsidiary, PruCare, where he was responsible for their group practice model.  His responsibilities included medical group operations and development, as well as specialty physician and hospital contracting.  From there, Nick moved on to focus on managed care and spent 8 years as the Director of Contracting and Reimbursement for the University of Medicine & Dentistry of New Jersey – Robert Wood Johnson Medical School with responsibilities for all managed care contracting and credentialing functions for its 375-physician faculty practice plan.  As a result of his tenure in senior administrative positions, he is also well versed in practice management functions, including payer contracting.  Nick has a Bachelor of Business Administration in Accounting from Seton Hall University.  read more...

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John Mullin

VP, Practice Management

John serves as a Vice President of Practice Management for Medac. He possesses a strong analytical and technical background and has extensive experience in billing and collections management, financial analysis, short and long term strategic planning, EMR transitions, staffing analysis & OR utilization, and hospital & managed care contract negotiations. Since joining Medac in 2009, John has worked extensively with anesthesia and pain management practices across the nation. He holds a Bachelor of Science in Business Administration (finance major) from Widener University and is a member of the Medical Group Management Association. read more...


Rey Romero

VP, Practice Management

Rey comes to Medac with more than 25 years of experience in billing operations and financial management.  He has managed multiple physician groups, ranging in size from 20 to 250 physicians.  Rey spearheaded the successful start-up of 6 large billing groups.  His duties included developing start-up processes and system set…  up, hiring staff and client and corporate reporting.  Most recently, Rey managed the University of Southern California Anesthesiology and Neurosurgery departments, where both departments experienced high levels of success, both financially and operationally. In addition, Rey has a vast knowledge of coding and compliance issues, and has successfully researched and solved various coding issues to increase reimbursement.  Rey has a Bachelor of Business Administration in Finance. read more...


Kelly Baldwin

VP, Practice Management

Kelly has more than 15 years of experience in healthcare, beginning her career at University Hospital in Augusta, Georgia, and then working for a private neurosurgeon. Kelly has extensive experience in managed care contracting, resolving contractual payment issues, and HIPAA compliance. In addition to her practice management experience,…  Kelly has knowledge of provider enrollment, accounts receivable management and assisted with the development of Medac’s Managed Care Module, which tracks under‐ and overpayments on managed care contracts and government payers. She has a Bachelor of Science in Education from The University of Georgia, is a member of Medical Group Management Association (MGMA), and is certified by the Board of Managed Care Medicine.​ read more...


Melanie Lafferty

VP, Managed Care & Business Process Outsourcing

Melanie joined Medac’s Practice Management team with 20 years of experience in the areas of anesthesia and pain management billing, practice management, coding and compliance.  Her experience includes practice management services for a wide variety of anesthesia provider organizations and operational management of client…  teams that provide revenue cycle management and new client implementation.  Melanie has also provided guidance with group formation, hospital relations, and payer negotiations.  She has been a presenter at many billing, coding, and compliance seminars across the country and continues to be a resource for many anesthesia associations. read more...


Becky Petross

VP, Practice Management

Becky has over 15 years of anesthesia specific billing and practice management experience. Becky previously worked with a national anesthesia billing and practice management company where she specialized in revenue cycle management, billing compliance, data and process analysis, and provider education. Most recently, she…  served as the Revenue Cycle Director with one of the nation’s leading anesthesia care companies with over 1,500 providers. Based on her in-depth knowledge of the anesthesia industry, Becky commands a high level of competency for continuous quality/process improvement. Becky is a Certified Public Accountant, holds a Bachelor of Business Administration from the University of Texas and an MBA with a concentration in healthcare administration from Dallas Baptist University. read more...

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Lori Sheaffer

Director, Practice Management

Lori joins the Medac team with over 23 years of experience in the areas of operations and managed care.   She enjoys a broad base of knowledge, one that encompasses both anesthesia and pain management.Her responsibilities have…  included managed care contracting, billing and revenue management and Corporate Compliance, having served as the HIPAA Officer for her previous anesthesia group.  Lori believes in an inclusive management style and is especially proud of her team’s consistent success in meeting or exceeding the MGMA benchmarks for AR.  Lori holds a Bachelor’s Degree in Business Management from the Pennsylvania State University, is a member of the Medical Group Management Association (MGMA), and is certified in HIPAA Privacy and Security. read more...

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Kristin Rich

Director, Practice Management

Kristin Rich began her career in the medical field at Medac in 2002 as an Accounts Receivable Representative. In 2004, she went on to pursue a career in ambulance billing with local services in the Augusta area where she learned enrollment, contracting, and various aspects of the billing cycle.  In 2007, Kristin returned to Medac as an Accounts Receivable Representative. In 2009, she was promoted to AR Supervisor for the Florida based accounts.  Within 10 months she was promoted to Account Manager over many of the Midwest accounts.  In early 2011 she was promoted to Regional Billing Manager for the Midwest Region where Medac has a steady growth in business.  Over the course of the last 6 years, Kristin has managed some of Medac’s largest clients, including one located in Oregon with $30M in monthly charges and more than 30 servicing locations. In July 2017, she promoted to Director of Practice Management where she is applying her 15 years of Operations knowledge and experience to provide our clients with stellar service. read more...


Todd Reno

Director, Practice Management

Todd has over 19 years of healthcare leadership experience.  Prior to joining Medac, Todd was in leadership at a fully integrated health system in North Central Washington for over 18 years.  There he helped lead the organization in their revenue cycle management, the organization’s journey into value-based medicine, leadership of their fully-capitated population, and eventually helped oversee the organization’s provider-owned health plan.  Now as a team member of Medac, he brings functional experience in revenue cycle management, managed care processes, health plan operations and strategy, contract management and negotiations, and overall health system leadership. Todd has been a past member of several healthcare professional organizations including America’s Health Insurance Plans (AHIP), Medical Group Management Association (MGMA), America Medical Group Association (AMGA), and Healthcare Financial Management Association (HFMA).  Todd is currently working on completing his Master of Business Administration from Western Governors University. read more...