Leadership Team

Robert Bessler, MD
Robert Bessler, MD
Chief Executive Officer and Founder
John Birkmeyer, MD
John Birkmeyer, MD
President, Medical Group
Gregory Johnson, MD, SFHM 1
Gregory Johnson, MD, SFHM
Chief Executive Officer, Hospital Medicine and Chief Diversity Officer
Nathan Ruch, MD, FACEP
Nathan Ruch, MD, FACEP
Chief Executive Officer, Emergency Medicine and Chief Integration Officer
Stephen Matchett, MD
Stephen Matchett, MD
Chief Executive Officer, Critical Care
Catherine Abshire, BSN, RN
Catherine Abshire, RN
Chief Nursing Officer
Jason Howard 1
Jason Howard
President and Chief Operating Officer
Jess Parks
Jess Parks
Chief Strategy Officer
Jamie Larsen
Jamie Larsen
Chief Financial Officer
Annie Fowler 1
Annie Fowler
Chief People Officer
April Burke, PA-C
April Burke, PA-C
Vice President, Advanced Practice Providers
Brian Carpenter, MD, SFHM
Brian Carpenter, MD, SFHM
Chief Medical Officer, Telemedicine
Andi Damron, CRNA, MSN, BSN
Andi Damron, CRNA, MSN, BSN
Chief Nurse Anesthetist Officer
John Dickey, MD
John Dickey, MD
Chief Medical Officer, Value-Based Care and Long-Term Care Management ACO
Lauren Jones
Lauren Jones, MD
Chief Medical Officer, Anesthesia
Sergio Zanotti, MD, FCCM
Sergio Zanotti, MD, FCCM
Chief Medical Officer, Critical Care
Gary Zimmer, MD
Gary Zimmer, MD
Associate Chief Medical Officer, Emergency Medicine
Robert Zipper, MD, MMM, SFHM
Rob Zipper, MD, MMM, SFHM
Chief Medical Officer, Physician Advisory and Health Policy