Medical Staff Services Department Directory
Mark Kehrberg, M.D., M.S., F.A.A.P.
Chief Medical Officer and Senior Vice President
Affinity Health System
Mercy Medical Center
500 South Oakwood Road
Oshkosh WI 54904
(920) 223-0503
mkehrber@affinityhealth.org
Margaret (Peg) Schiek, Director
Medical Staff Services
Affinity Health System
2700 W 9th Avenue, Ste 209
Oshkosh, WI 54904
P (920) 223-2064
F (920) 223-2070
pschiek@affinityhealth.org
Jennifer Koponen, Supervisor
Medical Staff Services
Affinity Health System
2700 W 9th Avenue, Ste 209
Oshkosh, WI 54904
P (920) 223-2062
F (920) 223-2070
jvanderp@affinityhealth.org
Affinity Health System Credentials Verification Office
Mary Lehr, Medical Staff Coordinator
Affinity Health System
2700 W 9th Avenue, Ste 209
Oshkosh, WI 54904
P (920) 223-2067
F (920) 223-2070
mlehr@affinityhealth.org
Deb Moede/Cathy Wilbur, Medical Staff Coordinator
Affinity Health System
2700 W 9th Avenue, Ste 209
Oshkosh, WI 54904
P (920) 223-2068
F (920) 223-2070
cwilbur@affinityhealth.org
Angella Gelhar, Credentialing Specialist
Affinity Health System
2700 W 9th Avenue, Ste 209
Oshkosh, WI 54904
P (920) 223-2065
F (920) 223-2070
agelhar@affinityhealth.org
Sarah Joyce, Clerical Assistant
Affinity Health System
2700 W 9th Avenue, Ste 209
Oshkosh, WI 54904
P (920) 223-2069
F (920) 223-2070
sjoyce@affinityhealth.org
Affinity Health System Sites
Heidi Kruzitski, Medical Staff Coordinator
Affinity Health System
2700 W 9th Avenue, Ste 209
Oshkosh, WI 54904
P (920) 223-2063
F (920) 223-2070
hkruzits@affinityhealth.org
Ellen Verstegen, Administrative Assistant
Calumet Medical Center
614 Memorial Drive
Chilton, WI 53014
P (920) 849-2386 ext. 212
F (920) 849-7510
eversteg@affinityhealth.org
Carole Carow, Medical Staff Coordinator
Mercy Medical Center
500 S Oakwood Road
Oshkosh, WI 54904
P (920) 223-0275
F (920) 223-0283
ccarow@affinityhealth.org
Network Health Plan/Network Health Insurance Company
Justine Marohn, Medical Staff Coordinator
Affinity Health System
2700 W 9th Avenue, Ste 209
Oshkosh, WI 54904
P (920) 223-2066
F (920) 223-2070
jmarohn@affinityhealth.org
Please contact Cathy Wilbur for changes or revisions at cwilbur@affinityhealth.org.
