Wellstar Service Line Leadership
Our team of Service Line Chiefs is comprised of industry-leading healthcare experts across over 300 locations who support over 100 medical specialties.
Service Line Leadership
![](/-/media/project/wellstar/org/headshots/team-members/john-brennan/akopov_valery_md_031/akopov-valery-md-square/akopov-valery-md-square.jpg?rev=-1)
Val Akopov, MD, MBA, MHA, SFHM
Service Line Chief | Hospital Medicine
Alan Muster, MD, MBA, MHA, FCCP
Service Line Chief | Pulmonary
![A friendly photo of Arif Aziz, MD](/-/media/project/wellstar/org/physician/arif-abdul-aziz.jpg?rev=a2bc4cd1f308491fbecefb94d3b6a278)
Arif Aziz, MD
Service Line Chief | Digestive Health
![Headshot of Carrie Stinson](/-/media/project/wellstar/org/physician/carrie-stinson.jpg?rev=617ce23d064842d080b220ea5d7fda7b)
Carrie Stinson, MD
Service Line Chief | Pediatrics
Barry Mangel, MD
Service Line Chief | Cardiovascular
![A friendly image of Jay Singh, MD](/-/media/project/wellstar/org/physician/dr_jay_singh.jpg?rev=933f40030257470d94023eff875193b0)
Jay Singh, MD, FACS, FASCRS
Service Line Chief | Surgery
Jeff L. Tharp, MD, MPH
Service Line Chief | Medicine/Primary Care
Joseph Burns, MD, FAAOS
Service Line Chief | Musculoskeletal
![A friendly image of Dr. Michael Andrews](/-/media/project/wellstar/org/physician/michael-andrews.jpg?rev=27191aa8ce2b46f09ddc2e37ef5755e3)
Michael Andrews, MD
Service Line Chief | Oncology
![A friendly headshot of Paula Greaves, MD](/-/media/project/wellstar/org/physician/paula-cecilia-greaves.jpg?rev=520cfd314451423b875a68188ee40266)
Paula Greaves, MD, FACOG
Service Line Chief | Women's Health
Gupta Rishi, MD
Service Line Co-Chief | Neuro Care
![A friendly headshot of Ryan Breshears, MD.](/-/media/project/wellstar/org/physician/ryan-e-breshears.jpg?rev=e647639d4b9e4c29aa6b98ca2e0b962a)
Ryan Breshears, PhD, ABPP
Service Line Chief | Behavioral Health
William Benedict, MD
Service Line Co-Chief | Neuro Care