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About Us
Articularis Healthcare Group, Inc (AHG) is a physician led and owned organization dedicated to improving healthcare by supporting independent rheumatology practices. As the nation’s largest Rheumatology specialty group, our affiliates have access to best business practices, advisory and management services, innovative practice performance technology, and value-based treatment pathways.
Our Mission
To support provision of the highest value community-based rheumatology services in a compassionate and ethical environment.
Physician Leadership Team
Jennifer K. Murphy, M.D.
Physician Director / Medical Officer
Gregory W. Niemer M.D.
Physician Director / Medical Officer
Colin C. Edgerton, M.D.
Chairman, ARN
Physician Director / Medical Officer
Gary E. Fink M.D.
Physician Director
Clarence W. Legerton III M.D.
Physician Director
Meet The Team
Michael Cooper
CEO
AHG & ARN
Timothy Hewson, JD
General Counsel
Executive Vice President
Farrar S. Stewart, MSHRD
Vice President of Human Resources
Katrina DeLuca, MBA, CPA, CFE, CIA
Director of Accounting & Tax
Nick Stoltmann, MBA, CPA
Director of Finance, Revenue Strategy, & Payor Contracting
Sean Weiss
Compliance Officer
J. Worth Williamson III, MHA
Director of Revenue Cycle
Karen McKerihan, MSN, NP-C
Director of Infusion and Clinical Services
Patty Howenstine, MSN, FNP-BC
Clinical Research Manager and Investigator
Brody Williamson, MSHA, MBA
Operations Manager
Caitlyn Bednarek, M.Ed, CHES®
Account Manager
Sarah McClain
Account Manager
Cassandra Olear
Account Manager
Angela Fruth
Human Resources & Credentialing Specialist
Kayla Benford, BSN, RN
Infusion Nurse Trainer
Morgan Grubbs, ICPP
Marketing and Business Development Manager
Refer a Patient
When you refer a patient to one of our network practices, you ensure that they will receive high-quality, personalized care.
Join Our Network
Learn more about our commitment to empowering better rheumatology care through an integrated and supportive network that helps local practices maintain their independence and flourish.
