Doctors & Staff

Our Holistic Health Care Staff Empowers Patients with Self-Care Tools & Knowledge

With impressive credentials and decades of experience, the physicians at the Riordan Clinic provide the very best in care and expertise. Our outstanding staff includes experienced and caring professionals who will make your time at the Riordan Clinic among the best medical experiences of your life.

Medical Providers

Ron Hunninghake, MD

Chief Medical Officer

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Nia Stephanopoulos-Chichura, MD

Overland Park Campus

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Jeff Evilsizor M.C., PA-C

Overland Park Campus

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Organizational Managers

Donna Kramme

Chief Executive Officer

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Mike Stewart

Director of Business Development

Carol Marsh

Director of Finance

Erin Manning, MBA

Director of Marketing

Paul Taylor

Director of Information Services

Front Office

Jean Van Ness

Office Manager

Mona Wilson

Patient Care Team

Alisha Gillespie

Medical Records

Jason Hattrup

New Patient Coordinator

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Megan Neathery

Nutrient Store Coordinator

Rachel Brewster

Accounting Assistant

Brett Landenberger

Information Services Assistant

Clinic Team

Chris Brannon, RN, BSN

Clinic Manager

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Annette Chlumsky, RN

Registered Nurse

Krystal Dinkel, RN

Registered Nurse

Olivia Nugroho, RN, BSN

Registered Nurse

TaNeisha R. Franklin, AAS

Medical Assistant/ Patient Liaison

Danae Baker, NCMA AAS

Certified Medical Assistant

Kristy Reid MA, AAS

Medical Assistant

Bio-Center Lab Team

Charles Hinshaw, MD

Laboratory Director

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Jerry Tiemeyer MT(ASCP)

ASCP • Laboratory Manager

Karen Moore MLT(CSMLS)

Laboratory Technologist

Amanda Lee NCMA, AAS


Charleen Jenkins, CMA


Overland Park Office

Kim Medis, RN, BSN

Registered Nurse

Michelle Carpet-Chichura, MBA

Patient Care Team

Conner Keyeski, RN, BSN

Registered Nurse

Hays Office

Betty Brungardt

Patient Care Team, Hays

Cindy Newell, RN

Registered Nurse

Debbie Augustine, LPN

Licensed Practical Nurse

Research Team

Nina Mikirova, PhD

Director of Research

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Ruth Scimeca PhD

Research Consultant

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Administrative Staff

Sarah Neathery

Patient Data Coordinator

Maintenance and Facilities

Dang Nguyen

Maintenance Manager

Aaron Kramme