Medical Providers

Aaron Marquardt, MD

Physician and Chief Medical Officer

Anthony Perkins, APRN, FNP-C

Nurse Practitioner

David Culp, APRN, FNP-C

Nurse Practitioner and Director of Clinical Services

Laurie Hamilton, APRN, FNP-C

Nurse Practitioner and Director of Quality Management

Tammy Jones, DO


Medical Staff

Alexia Clark, CMA

Medical Assistant

Beth Swanner, RD


Chad Giovingo-Moore, LPN

Clinic Nurse

Reesa Alexander, LPN

Medical Case Manager

Tabia Starks

Medical Assistant

Behavioral Health and Substance Use

Amanda Norris, PhD


DeeDee Toney, LPC-S

Substance Use Counselor and Director of Support Services

Vickie Remillard, LCSW

Social Worker

Support Services

Ann Booth

Benefits Coordinator

Christy McPherson

Community Based Outreach Worker

DeeDee Toney, LPC-S

Director of Support Services

Gwen Guillory

Linkage and Prevention Coordinator

Ray Roberson

Non-Medical Case Manager

Rusty Chambless

GBT Center Coordinator, Purchasing, and Corporate Compliance Officer

Tena Dunn

Non-Medical Case Manager

Toni McFarland

Non-Medical Case Manager


Jamie Killian

Front Office Coordinator

Jeremy Jones

Front Office Coordinator

Jessica Bass

Data Coordinator

Mark L Windham

Chief Executive Officer

Nancy Head

Chief Financial Officer

Tiffany Johnson

Executive Assistant to the CEO and CFO