MSN began as a successful radiology group’s billing department and progressively evolved to become one of the leading radiology billing companies in the nation. We understand the operational culture and needs of the radiology practice and carefully assembled a team of experienced billing experts, supported by leading industry technology. We speak the language of radiology and are totally committed to the success of our clients.

MSN also invested in infrastructure, beginning with installation of a leading billing software in 2005, which encouraged a culture of continuous process improvement and the use of intelligent automation.  


Walt Blackham, Senior Vice President Coding and client Services

Walt Blackham
Senior Vice President Coding & Client Services

Walt has a strong background in radiology billing and practice management and is recognized nationally as one of the leading authorities on radiology coding. Walt has been practice administrator of a large radiology group practice for more than 20 years and formerly President and CEO of Specialty Medical Services, Inc., a billing service for radiology and pathology practices.

He has served as Chair of the RBMA Coding Committee and is currently a member of the Committee on Coding and Nomenclature of the American College of Radiology (ACR), a position he has held intermittently for many years.

Karl Brown, Senior Vice President of Client Services

Karl Brown
Senior Vice President of Client Services

Karl brings more than twenty years of experience to his role as Senior Vice President of Client Services and provides practice management and strategic support for MSN clients. He is a graduate of Auburn University and active member of the RBMA on both a national and state chapter basis. In addition, Karl is Vice President of Human Resources for MSN and in that role, is responsible for developing employment policies, benefits design and corporate infrastructure.  

Renee Engle, Senior Vice President of Client Services

Renée Engle
Senior Vice President of Client Services

Renée Engle offers extensive experience in CPT/ICD coding, MIPS and healthcare management.  She also acquired a background in nursing and credentials as a Radiology Certified Coder (RCC) and Radiology Certified Coder in Interventional Radiology (RCCIR.)

She joined MSN in 1997, overseeing client services and providing guidance on dictation and compliant documentation for MSN physician clients, including customized educational programs for specific client areas of interest.

Renee is President of the Radiology Coding Certification Board (RCCB) and is a member of the American College of Radiology (ACR) CPT and Nomenclature Committee and the ACR Carrier Advisory Committee (CAC), where she has served for several years. A Fellow of the RBMA, she also served as an At-Large Director on the RBMA Board and as President of the Georgia RBMA.      

Susan Gregg, CMPE, RCC, RFBMA, Senior Vice President

Susan Gregg
Senior Vice President

Susan joined MSN 2015 and brings more than 35 years of radiology practice management experience to her clients.  Prior to joining MSN, Susan was a principal in Shared Management Services, a revenue cycle management company.  Susan has been an active member of the RBMA, earning fellowship distinction in 2011.  She has held leadership positions on both the national and state level and served as the RBMA’s National President.  She currently serves on the ACR Managed Care and Payers Relations Networks, the Oklahoma Medicare Contractor Advisory Committee, and the Medicare Provider Outreach and Education Advisory Group.  Susan is Immediate Past President of the Radiology Coding Certification Board and iscertified as a Medical Practice Executive by the American College of Medical Practice Executives.

Suzanne Taylor, FRBMA, Senior Vice President of Operations, Central Region, multi-specialty billing services team

Suzanne B. Taylor
Senior Vice President of Operations, Central Region

Suzanne contributes a strong background in medical practice management, accounting and billing to MSN clients, a career that began in 1985. She joined MSN in 2008 and is an excellent resource to clients, providing operational oversight, workflow analysis, personnel management and client services to groups in MSN’s Central Region.

Suzanne served as President of the RBMA and was named a Fellow in 2010 as part of that organization’s inaugural Fellowship class.  In addition, she was Chair of the Managed Care Task Force, Nominations Committee and Fellowship Selection Committee. Suzanne continues to serve on the RBMA Federal Affairs and Payer Relations Committees.

Becca Goare, Senior Vice President Operations Eastern Region, multi-specialty billing services team

Becca Goare
Senior Vice President Operations, Eastern Region

Becca Goare has shared a wealth of operational experience with MSN Clients since 2002. She oversees billing operations and is deeply involved in analysis, resolution of client issues and the standardization of operating procedures.

Becca has earned the necessary credits to become a Certified Healthcare Billing Management Executive (CHBME) and is a member of the Radiology Business Management Association (RBMA), the Georgia RBMA, the Healthcare Business Management Association (HBMA) and the Anesthesia Institute for Anesthesia Billing and Practice Management (AIABPM).

She holds a Master of Public Administration Degree and previously served as President of the GRBMA. Prior to joining MSN, she worked for Blue Cross Blue Shield of Georgia and the Hughston Orthopedic Clinic.  

James “Bo” Trotter, Jr.
President, Chief Executive Officer, & Founder

Bo’s experience in medical group practice management began in 1977 and provided a unique background when he started MSN based on a client-focused business philosophy. He understands practice operations, physician concerns and how emerging trends can impact the financial performance of a practice. A graduate of the University of Georgia, Bo is a Past President of the Radiology Business Management Association and a founding member of the Healthcare Billing and Management Association (HBMA). He also serves as Executive Secretary for the Georgia Radiological Society GRS, where he was recently honored with the GRS Gold Medal for his professional contributions. Bo has served on the American College of Radiology’s (ACR) Regulatory Compliance Committee, the Economics Commission, and the Committee on Coding and Nomenclature. He is a member of the RBMA Inaugural class of Fellows, having been awarded the designation of Fellow of the RBMA in June 2010.

Jim P. Trotter, III
Chief Operations Officer

Jim oversees all operational areas of MSN to ensure client service goals are prioritized, including implementation of technology and innovation to meet objectives established by the Chief Executive Officer and Board of Directors. He is responsible for the development and implementation of strategies consistent with execution of the MSN business plan. Jim is an active member of the Radiology Business Management Association (RBMA), earned the status of Certified Healthcare Billing Management Executive (CHBME) and an active member of the Georgia Radiology Business Management Association (GRBMA). He holds a bachelor’s degree in business administration.    

Barbara Rubel, Senior Vice President, Marketing and Client Services

Barbara Rubel
Senior Vice President, Marketing & Client Services

Barbara has been a leader with MSN Client Services since 1998. Her extensive background in strategic planning, market research, healthcare marketing and managed care negotiations provide a wealth of information to support MSN Clients. Barbara has also been highly involved in industry organizations, serving as President of the Radiology Business Management Association (RBMA), the Georgia RBMA, and the Florida RBMA. In addition, she chaired the influential RBMA Federal Affairs Committee and the RBMA Technology Task force and was a member of the RBMA Data Committee. Her work on behalf of radiology has earned her the RBMA Special Recognition Award (2010), the RBMA Global Achievement Award (2013), and she is a Fellow of the RBMA.

Steve Collins, Vice President, Client Relationships & Business Development

Steve Collins
Vice President, Client Relationships, & Business Development

Steve brings a varied radiology background to MSN clients, with 27 years’ experience working with radiology groups in different capacities. He has been an operations manager for a large private practice group serving multiple hospitals and imaging centers and also developed and implemented business expansion opportunities for a consortium of leading radiology practices.  In addition, Steve has successfully worked in sales for both revenue cycle management companies as well as market-leading radiology practice management and radiology information systems. He has been involved with the Radiology Business Management Association (RBMA) as a member of the Board of Directors for the national organization as well as revitalizing the Colorado RBMA chapter and serving as its President.    

Terry Corgan, Vice President, Client Development and Marketing

Terry Corgan
Vice President, Client Development & Marketing

Terry provides MSN with decades of experience in healthcare sales, marketing and Client support. His professional career has been dedicated to the development and support of Clients in the physician practice management arena, and more specifically radiology billing and information systems. Terry has been responsible for the development of a broad spectrum of clients for MSN from the initial practice review through contract implementation. In addition, he plays a major role in client communications and support. Terry is a graduate of Villanova University with a degree in Business Administration and a concentration in marketing. He has been an active member of the Radiology Business Management Association (RBMA) for over 19 years and currently serves on the RBMA Data Committee.

Chris Heimerl, Director of Client Services and Marketing

Chris Heimerl
Director of Client Services & Marketing

Chris brings more than 20 years of experience to his role in client services and marketing. He joined the MSN team in 2011 and has worked with radiology practices to evaluate their business models and then assist them in improving efficiency and profitability. He is a graduate of the University of Wisconsin—Stevens Point and began his healthcare career in physical therapy before transitioning to marketing. Chris has been active as a member of the national Radiology Business Management Association, also serving as President of the Colorado chapter for approximately five years, has served on the board of directors for the state organization for eight years.  

Deborah MacFarlane, Client Services, Western Region

Deborah MacFarlane
Client Services
Western Region

Deborah has more than three decades of experience working with physicians across the country to maximize practice revenues, reimbursement and improve financial performance. She joined MSN in 2009 and clients have benefited from her expertise in revenue cycle management, practice development, marketing, payor contracting, imaging center operations and hospital-based practice administration. She holds an MBA from Pepperdine University and is an active member of the Radiology Business Management Association.



  • Experienced certified radiology (RCC) and interventional radiology (RCCIR) coders 
  • Coding from physician reports 
  • Physician education: documentation, medical necessity and compliance 


  • Charge acquisition and verification 
  • Fee schedule analysis and recommendations 
  • Responsive claims follow-up and appeals 
  • Monitoring of accounts receivable trends 
  • Workers’ Compensation expertise 
  • Data entry 
  • Refund reconciliation of overpayments 


  • High level of accurate claims submission
  • Streamlined appeals processes
  • Flexible billing cycles
  • Patient payment plans


  • Payment plans
  • Payment options
    • Phone
    • Portal
    • Mail
    • E-chat


  • Complete and detailed billing management reports
  • Flexible and responsive reporting and analysis


How can we help? Select an option below and complete the form to get in touch.

MSN Services Inquiry

If you would like to learn more about MSN services for your practice, please call us or use the form below.

1-866-567-7405  / Local: 706-653-8150

Patient Billing Inquiry

If you have a question(s) about your bill, please contact Ashlea Wadsworth or fill out the form below.

Ashlea Wadsworth
706-653-1102 ext 52135