Tonia K. Ackerman, MSN, ARNP
Tonia is a state licensed Advanced Registered Nurse Practitioner. She is board certified in Family Practice by the American Nurses Credentialing Center. Tonia graduated in 2002 with a Masters of Science degree in Nursing-Family Nurse Practitioner from Clarkson College in Omaha, NE. She also earned her Bachelor of Science in Nursing from Grand View College in 1999, and an Associate degree in Nursing(RN) in 1990 from Marshalltown Community College. She has over 18 years of experience in several areas of nursing. Tonia is a member of the Iowa Nurse Practitioner Society, American Nurses Association, and the Society of Dermatology Physician Assistants.

Sonja Baer, P.A.-C.
Sonja is a state licensed Physician Assistant accredited by the NCCPA. She has a Masters degree in Physician Assistant studies from Des Moines University. Sonja also has a Masters degree from Drake University in higher education and a Bachelors degree from Iowa State University in Physical education with a minor in Exercise science. As a Physician Assistant Sonja has worked in Orthopedics and also has 15 years experience as a certified athletic trainer and certified strength and conditioning specialist. She is currently a member of the Society of Dermatology Physician Assistants.

Amy S. Eschweiler, P.A.-C.
Amy is a state licensed Physician Assistant accredited by the NCCPA. Amy graduated Summa Cum Laude with a degree in Biology from the University of Northern Iowa and also received a Bachelor of Science degree-Physician Assistant from the University of Osteopathic Medicine and Health Sciences. Amy has worked in the Dermatology profession since 1999 and is a member of the following professional organizations: American Academy of Physician Assistants, the Society of Dermatology Physician Assistants, and the Iowa Physician Assistants.

Megan Ferguson, A.R.N.P.
Megan is a state licensed Advanced Registered Registered Nurse Practitioner. She is board certified in Family Practice by the American Academy of Nurse Practitioners (AANP). Megan graduated with highest distinction and honors with her Bachelor of Science degree from the Univ. of Iowa. Megan then earned her Masters degree as a Family Nurse Practitioner. She is a member of the American Academy of Nurse Practitioners.

Racheal McMahon, P.A.-C.
Racheal is a state licensed Physician Assistant accredited by the NCCPA. She earned a Masters degree in Physician Assistant studies from University of Nebraska Medical Center after earning her Bachelors degree from the Univ. of Nebraska. Racheal has a history of volunteerism and also received multiple honors during her schooling. The physicians and staff welcomed Racheal to Dermatology, P.C. in January 2013.

Lizabeth Price, A.R.N.P
Liz is a state licensed Advanced Registered Nurse Practitioner. She is board certified in Family Practice by the American Academy of Nurse Practitioners. Liz graduated in 2002 with a Masters degree in Nursing-Family Nurse Practitioner from Drake University. She also eaarned her Bachelor of Science degree in Nursing from the University of Iowa. Liz is a member of the Iowa Nurse Practitioner Society, the American Academy of Nurse Practitioners, and the Society of Dermatology Physician Assistants.

Jennifer A. Vandivier, P.A.-C.
Jennifer is a state licensed Physician Assistant accredited by the NCCPA. She graduated in 2002 from Des Moines University with a Bachelor of Science in Physician Assistant studies after achieving her Bachelor of Science-Nursing from Mount Mercy College. Jennifer has been practicing dermatology in our clinic since that time. Along with her impressive volunteer work, she is an active member of the following professional societies: The Iowa Physician Assistant Society, The American Academy of Physician Assistants, and the Society for Dermatology PA’s.

Crista B. Wilkening, A.R.N.P.
Crista is licensed by the State of Iowa as an Advanced Registered Nurse Practitioner. She is board certified in family practice by the American Nurses Credentialing Center. Crista received her bachelorxs degree in nursing from Allen College in 2007. Crista is a recent graduate of Clarkson College where she received a Masters degree in nursing. Before joining Dermatology, P.C. Crista held positions as a registered nurse at Mercy Medical Center and Wolfe Eye Clinic. Crista is a member of the American Academy of Nurse Practitioners, Sigma Theta Tau Honor Society of Nursing, Society of Dermatology Physician Assistants, and Dermatology Nurses Association.