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

Montgomery M. Daniels, MBA

Human Resources Generalist

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.

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