Physician Bios

Click on the Dr.'s name below to view his or her bio.

Jamal U. Akbar, M.D.	Sambasiva Kottamasu, M.D.	Rita S. Ratani, M.D.
Marina Ananich, M.D.	Peter A. Lassing, M.D.	Clinton E. Rogers, M.D.
George F. Ascherl, Jr., M.D., F.A.C.R.	Mark R. Ludka, M.D.	Shahzad Sadiq, M.D., F.A.C.R.
Sultan Bhimani, M.D.	Sigrid E. Messana, D.O.	Robert B. Saltzman, M.D.
Chirdeep Bhutani, M.D.	Steve Min, D.O.	Sanjay J. Talati, M.D.
Scott E. Cheney, M.D.	Rajesh Mithalal, M.D.	Joseph E. Talbot, M.D.
John F. Cherry, M.D.	Charles E. Mueller, M.D., F.A.C.R.	Julie Taylor, M.D.
Joseph P. Cousins, M.D., PhD	Gopi K. Nallani, M.D.	Venkatramana R. Vattipally, M.D.
Ramakrishnayya K. Gadam, M.D.	Kristin M. Nelsen, M.D.	Matthew L. Waack, M.D.
	Nasser O. Qadri, M.D.	Harvey K. Yee, M.D.

Physician Assistants

Rodney Norman, MS, PA-C

Robert E. Toevs, PA-C

Sigrid E. Messana, D.O.
Staff Radiologist
Covenant Healthcare
St. Mary’s of Michigan
St. Mary’s of Michigan-Standish Hospital
Tawas St. Joseph Health System
Hills and Dales General Hospital

Medical Degree and Fellowships
Michigan State University
College of Osteopathic Medicine
East Lansing, MI
Fellowship in Mammography and Chest Imaging,
Yale University School of Medicine, New Haven, CT

Internship
Traditional Internship-Genesys Regional Medical Center; Grand
Blanc, MI

Residency
Radiology Residency-Oakwood Hospital and Medical Center;
Dearborn, MI

Certifications
American Board of Radiology
National Board of Osteopathic Medical Examiners