Medical Staff Office

Meet the Medical Administrative Team  

The Medical Administrative Team is available to assist with you with questions related to Garden City Hospital’s credentialing, privileges, departmental meetings/minutes and malpractice insurance.  The team can be reached at 734.458.4484.


Dr. Reuttinger

H. Rex Ruettinger, D. O
Medical Staff Director

Administrative Staff:

Cindy Cook
Credentialing Coordinator



Ann Henry
Executive Secretary


Physician Liaison Services 


Julie Hejnicki

Our physician liaison services are available to assist you in your transition to Garden City Hospital.  From scheduling tours to view our facilities and facilitating meeting with our administrative team, to scheduling your orientation, CPOE training, and assisting you with practice requests. 

For more information, please contact Julie Hejnicki at 734.458.7207 or email at

Meet the Medical Department Chairs

GCH Medical Department Chairs are responsible for fostering the clinical, educational and research missions (clinical, translational and basic) of their respective departments.

Hong Wang

Hong Wang, M.D.

Tressa Gardner

Emergency Department
Tressa Gardner, D.O.


Jean Barbat

Jehan Barbat, M.D.


Ala Shuker

Internal Medicine
Ala Shuker, M.D.

Sheryl Parks

Sheryl Parks, M.D.

Mala Sengupta

Mala Sengupta, M.D.


Alex El-Sabbagh, M.D.

Alex El-Sabbagh, M.D


Dr. Medley

Marshall Medley, D.O.