Michigan Great Lakes Leadership

Courtney Guernsey serves as the Vice President of Patient Financial Services for Corewell Health, the largest healthcare system in Michigan with 22 hospitals and over 60,000 employees.  She leads end-to-end patient financial services operations, including hospital and professional billing, post-acute billing, denial management, underpayment recovery, credit resolution, cash applications, and patient financial experience. With over 24 years of healthcare finance experience, Courtney has a strong focus on operational excellence, strategic partnerships, and data-driven performance improvement.

As an HFMA member since 2015 and passionate advocate for professional development and industry collaboration, Courtney brings a forward-thinking and inclusive leadership style to the Michigan Great Lakes Chapter. As Chapter President, she is committed to advancing member engagement, education, and innovation throughout the fiscal year.

HFMA Services & Achievements

• Silver Member Engagement Award 2024
• CRCR 2019
• CHFP 2020
• FHFMA 2020
• EHRC 2024
• Women in Leadership committee member 2017-2023
• Women in Leadership committee chair 2019-2022
• Certification Director 2021-2023
• William G. Follmer Bronze Award 2022

Nichole Niesen is the Director of Automation for Corewell Health.  Nichole got involved with HFMA back in 2017 at the suggestion of her CFO because she supported Revenue Cycle and Finance technology.  Her active volunteering began shortly after attending a Spring conference, joining the Women in Leadership and Social Committees.  Nichole has served in Michigan Great Lakes Board Positions as Certification Director, Communications Director and most recently as Vice President.  Nichole actively partners to enhance our chapter’s strategy to deliver Virtual Conferences & Virtual Education.       

Throughout her 12 years in Healthcare Technology, in addition to supporting Revenue Cycle & Finance technologies, she has also led technologies within Clinical Informatics, Service Desk, and Site Support. Nichole leverages her HFMA derived knowledge to infuse financial acumen into Corewell Health’s Enterprise Automation Program.     

Prior to healthcare, Nichole also worked in banking, transportation, staffing, and higher education.  She completed her Bachelor of Applied Arts & Master of Arts at Central Michigan University, holds multiple Epic software certifications and is a Fellow of Healthcare Finance Management Association.  Currently residing in northwest Michigan, you can find Nichole creating in her kitchen (chicken piccata is her specialty) or outside enjoying all the beauty Michigan has to offer.

Hannah Perez is the Revenue Cycle Operations Manager at Corewell Health. She has been with the revenue cycle team since February 2018. Prior to joining revenue cycle, Hannah was a practice manager at Helen DeVos Children’s Hospital and managed the Aerodigestive subspecialty practices; pediatric pulmonology and sleep medicine, pediatric allergy and immunology and pediatric gastroenterology. Hannah has been with Corewell Health for 13 years functioning in a variety of roles prior to her management positions. She earned her undergraduate degree in Health Services Administration from the University of Evansville and graduate degree in Administration with a focus in Health Services from Central Michigan University. Hannah is actively involved in the HFMA Michigan Great Lakes Chapter and currently serves as the Vice President. Her previous roles include chapter secretary, early careerist director, membership committee chair, and active volunteer on the education and certification committees.

Kelli Williams is a Senior Reimbursement Specialist at Trinity Health, where she has been a dedicated member of the Reimbursement Department since 2010. Prior to this role, she served as a Senior Accountant at Holland Hospital. Kelli has been an active member of the Healthcare Financial Management Association (HFMA) since 2009, volunteering with the Michigan chapter since 2013. Throughout her tenure with HFMA, she has contributed to numerous committees and held various leadership positions.

Kelli holds a Bachelor of Business Administration with a concentration in accounting (2005) and a Master of Healthcare Administration (2008). She resides in Byron Center with her husband, two teenage sons, and their beloved Chihuahua, Miss Bella.

HFMA Services

• Member since 2009
• Officer – Secretary (2025–2026)
• Officer – Vice President (2019–2020)
• Director (2015–2019)

Awards and Recognition

• Medal of Honor Award Recipient (2024)
• Muncie Gold Award Recipient (2020)
• Reeves Silver Award Recipient (2018)
• Follmer Bronze Award Recipient (2017)

HFMA Committees and Other Activities

• Women In Healthcare Leadership Program
  • Member (2019–Present)
  • Co-Chair (2018–2019)
• Programs Committee
  • Co-Chair (2025)
  • Chair (2017–2018)
  • Member (2018–2023)
• Networking Committee
  • Chair (2018–2019)
  • Member (2019–2022)
• Membership Committee
  • Chair (2015–2017)
• Spring Conference Committee
  • Member (2013–2020)
• Registration Committee
  • Member (2013–2017)

Nancy has worked for Trinity Health for more than 15 years.  She is currently a revenue management consultant for the reimbursement department.  Prior to Trinity Health, she worked for National Government Services, LLC as an audit manager.  

HFMA Services & Achievements

• Member since 2008
• Officer – Treasurer 2022-2024
• Officer – Past President 2021-2022
• Officer – President 2020-2021
• Officer – President-elect 2019-2020
• Officer – Vice President 2018-2019
• Officer – Secretary 2017-2018
• Director 2014-2017
• Medal of Honor Award Recipient 2022
• Muncie Gold Award Recipient 2018
• Reeves Silver Award Recipient 2017
• Follmer Bronze Award Recipient 2016

HFMA Committees and Other Activities

• Member – Women In Healthcare Leadership Program 2019-Present
• Chair – Spring Conference Committee 2019-2020
• Member – Networking Committee 2019 – 2023
• Member – Yerger Committee 2018-2020
• Member – Program Committee 2017 – 2021
• Chair – Women In Healthcare Leadership Program 2017-2018
• Chair – Directory Committee 2016
• Contact – Chapter Certification 2015-2017
• Co-Chair – Programs Committee 2015-2017
• Member – Newsletter Committee 2014-2018
• Chair – Membership Committee 2014-2015
• Member – Spring Conference Committee 2013-2019
• Member – Registration Committee 2013-2017

Role: Senior Manager – Healthcare Consulting

Michael is a Senior Manager at Plante Moran in our Acute Healthcare Management Consulting practice and am well-versed in healthcare finance, reimbursement, and decision support. I am focused on reimbursement optimization, and strategic finance including feasibility models, proformas, and service line analysis. My client base is primarily hospitals and health systems, and I also serve several post-acute providers. My industry experience allows me to relate to my client’s needs as I have roughly 15 years of experience on the provider side between McLaren and Ascension, in addition to over five years of experience at professional service firms. I am the current past president of the Michigan Great Lakes Chapter and Regional Executive 3. I am looking to stay involved in HFMA past my president year and have intentions of future leadership involvement at the national level. I have been a member of the legacy Eastern Michigan Chapter board since 2016 and saw our chapter through its consolidation in 2020. I am a past Education Director and have also served as the co-chair of the Reimbursement Committee for several years. I have been an active member of HFMA since 2009 and have volunteered in chapter leadership positions since 2012. I received my fellowship in 2019 and the Muncie Gold merit award in 2024.

Ariana has worked at Trinity Health for the past 10 years.  She is currently the Manager, Provider Enrollment in the Reimbursement department and leads the System Office Government Provider Enrollment Team with oversight over government provider enrollment work system wide.  

Ariana is committed to proactive promotion of equity and ending systemic racism (including health equity and reducing measurable social disparities of health) and is an active volunteer with many organizations in metro-Detroit communities. She is also the co-Lead of the Women’s Inclusion Network (W.I.N.) Colleague Resource Group at Trinity Health, which fosters personal and professional development of colleagues.

Ariana has a JD from Wayne State University School of Law and a Bachelor of Arts degree in Political Science and Communication from Eastern Michigan University.

Ariana has two rescue dogs, two cats and a rescue ball python.  Her hobbies include kayaking, tubing, gardening and karaoke.

HFMA Services and Achievements

• HFMA member since 2017
• HFMA Michigan Great Lakes Chapter President-Elect FY23
• HFMA Michigan Great Lakes Chapter Vice President FY22
• Board Member – 2020 – present
• HFMA-EMC New Member of the Year Award 2017
• Follmer Bronze Award 2019
• Reeves Silver Award 2020
• Muncie Gold Award 2021

Committees and Other Activities 

• Follmer Bronze Award 2020
• Co-Chair Early Careerist Committee FY18-FY23
• HFMA Michigan Great Lakes Chapter Membership Director FY21
• HFMA Michigan Great Lakes Chapter Women in Leadership Committee Member 
• HFMA-EMC Member of Women’s Conference Planning Committee FY19, FY23
• HFMA Michigan Great Lakes Chapter Women in Leadership Committee 
• Past HFMA-EMC Membership Committee member
• Past HFMA-EMC Reimbursement Committee member

Bill has worked for healthcare solution and service providers for over 20 years primarily working to help healthcare providers solve their revenue cycle challenges and improve the patient experience. Bill is a past-president for the Southeast MI HFMA chapter, with his president year occurring the year that the three Michigan chapters finalized steps to merge into one.

Due to Bill’s professional role, he attends several industry conferences and events each year across the Midwest and nation. These include, the HFMA chapters of IN, OH, IL, WV, KY, PA, VA and more – as well as AAHAM events and the Michigan Revenue Cycle Association. This gives Bill tremendous exposure to how other organizations are providing education and what content they are presenting which will be beneficial to our own chapter as we look to line up the very best education opportunities and speakers.

HFMA Services & Achievements

• Member since 2010
• Officer – Past President 2020-2021
• Officer – President 2019-2020
• Officer – President-elect 2018-2019
• Officer – Secretary 2017-2018
• Officer – Treasurer 2016-2017
• Follmer Bronze Merit (2015)
• Reeves Silver Merit (2017)
• Muncie Gold Merit (2019)
• William Lubaway Award for Outstanding Committee Chair (20-15-2016)

Committees and Other Activities

• Event Photographer/Event Speaker/Newsletter Article Author
• Chair – Communications & Social Media Committee
• Chair – Education Committee

Brent is currently the Corporate Director of Net Revenue at McLaren HealthCare, where he has worked for 12 years. He holds both a Bachelor’s and a Master’s in Business Administration – Accounting from the University of Michigan Flint. Brent is a credentialed Fellow of the Healthcare Financial Management Association (HFMA). Over the past 15 years, he has served in multiple roles within HFMA, including President and board member. Presently, Brent is an active Director with the Michigan Great Lakes Chapter and also chairs the Enterprise Committee.

Revenue Cycle at Sparrow. Her most recent role is Director of Revenue Integrity. Her areas of expertise are reimbursement, contract management, and Charge Description Master. Heather is very excited about her new role as it has allowed her to learn even more about Revenue Cycle as a whole. Heather became an HFMA member in 2015. She joined both the networking committee and the program committee in 2019 for the Western Michigan Chapter. Heather remained on the program committee through the merge of the 3 Michigan HFMA Chapters. She now serves as the Networking Director and sits on the sponsorship and communications committee.

Heather graduated from Central Michigan University in 2011 with a B.A. in Health Administration and Finance.

HFMA Services & Achievements

• Member since 2015

Committees and Other Activities

• Member – Communications Committee 2023-present
• Member – Networking Committee 2019-present
• Member – Sponsorship Committee 2022-present

Accomplished, dynamic, and results-driven Healthcare Executive focused on transforming operations by enhancing regional strategy and execution across all levels of operations. Diverse and detailed expertise spanning Operating and Capital budgeting, productivity benchmarking and monitoring – ambulatory and hospital settings, Revenue Cycle, Reimbursement and Payor Contracting, Analytics, Supply Chain, Union Relations, and Finance/Decision Support functions. Natural talent for designing and deploying strategies related to growth, capitalizing on service lines, and promoting accountability, resulting in long term successful organizations. Recognized ability to communicate complex information, influence decision-making, and lead agile teams to overcome challenges, prioritize demanding work, and forge a path to success. Mentor, coach, and lead teams, fostering a culture of continuous learning, professional development, and growth.

Paige has worked at Medix Healthcare for nearly 4 years as a Senior Business Development Manager. Paige works closely with healthcare clients across the Midwest, leveraging her expertise to identify and place top talent within the Revenue Cycle space. By focusing on addressing staffing shortages, Paige ensures that healthcare organizations have access to highly skilled professionals at the right time, enabling them to maintain operational efficiency and deliver high-quality care.

Paige is an active member of the Communications and Networking Committee for the Michigan Great Lakes Chapter, supporting the posting of content on the chapter’s social media platforms throughout 2024. Paige earned her Bachelor’s Degree in Business Marketing from Northern Illinois University. In her free time, Paige enjoys traveling, hiking in the mountains, spending time on the Chicago Lakefront, and creating art.

Rachel is a Senior Performance Management Consultant in Revenue Excellence at Trinity Health. She brings eight years of Revenue Cycle performance management and insurance billing operational leadership to Trinity Health. She has expertise in facility billing including denials prevention, write-off reduction, payer strategy, collectability risk assessments, and Epic workflow optimizations. Rachel is skilled at building cross-functional relationships to help facilitate sustainable process improvements and reduce AR. Rachel joined the Michigan Great Lakes HFMA Women in Leadership Committee in 2022 and was the co-chair of the committee for the 2024-25 HFMA year. She also holds the Key Focus Group Director role for the Great Lakes Chapter.

HFMA Contributions

• Key Focus Group Director – January 2024-present
• Member since 2016
• Member – Women in Leadership Committee 2022-2023
• Committee Chair – Women in Leadership 2023-2024
• Committee Co-Chair – Women in Leadership 2024-2025

Tina works at Henry Ford Health as a Principal Management Engineer. Prior to her current role, Tina worked at Trinity Health for 9.5 years and has over 15 years invaluable experience in front and back-end Revenue Cycle.  Throughout her career she has managed, led and been an integral part of optimization initiatives and process enhancements as well as worked in analysis, managed care contracting, provider enrollment and credentialing to name a few. Tina has a great passion for Revenue Cycle and has great enthusiasm for HFMA and the service they provide to our healthcare community. She has certifications in CRCR, CSPR, and CSBI and is currently chair of the Certification Committee and is part of the Board of Directors both now and from 2017- 2020.  Tina holds two master’s degrees in finance and public health administration.

Tom Matonican is the President/CEO of CBM Services, a full-service collection agency that has been recovering debt for over 103 years. Tom is a past president of the Great Lakes HMFA chapter and a current board member for Michigan Great Lakes HMFA and the sponsorship director. He is the current treasurer for the Michigan Association of Collection Agencies. Previously, he was appointed by Governor Snyder to serve on the Michigan Collection Practices Board, past treasurer for The Safe and Sound Child Advocacy Center and a past board member for the Midland Area Chamber of Commerce and the Commerce Center Management Corporation. Tom was employed as a public accountant for Burnside & Lang, P.C. and then as Director of Finance for the Midland Area Chamber of Commerce. He holds a Bachelor of Arts Degree in Accounting from Michigan State University. Tom was born and raised in Traverse City but has made Midland his home for the past twenty years.        

Tom is married to his lovely wife Tara, who is employed at Edward Jones.  They have two beautiful daughters, Madison (16) and Cassidy (14).

HFMA Services & Achievements

• Past President – Great Lakes Chapter