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
Mercy Medical Center
500 South Oakwood Road
P (920) 223-2064
F (920) 223-0283
pschiek@affinityhealth.org
Jennifer Koponen, Supervisor
Affinity Health System
2700 W 9th Avenue, Ste 209
Oshkosh WI 54904
P (920) 223-2062
F (920) 223-2070
jkoponen@affinityhealth.org
Affinity Health System Credentials Verification Office
Mary Lehr, Medical Staff Cordinator
Affinity Health System
2700 W 9th Avenue, Ste 209
Oshkosh WI 54904
P (920) 223-2067
F (920) 223-2070
mlehr@affinityhealth.org
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
Deb Moede, Medical Staff Coordinator
Affinity Health System
2700 W 9th Avenue, Ste 209
Oshkosh WI 54904
P (920) 223-2068
F (920) 223-2070
dmoede@affinityhealth.org
Angella Gelhar, Credentialing Specialist
Affinity Health System
2700 W 9th Avenue, Ste 209
Oshkosh WI 54902
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
Oskosh WI 54904
P (920) 223-0275
F (920) 223-0283
ccarow@affinityhealth.org
Network Health Plan
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
kmarohn@affinityhealth.org
Please contact Cathy Wilbur for changes or revisions at cwilbur@affinityhealth.org.
