Physician Assistant/Nurse Practitioner

Bailey O’Donnell, P.A.-C.

Bailey is a state licensed Physician Assistant accredited by the National Commission on Certification of Physician Assistants (NCCPA). She earned her Master of Physician Assistant Studies at St. Ambrose University, after completing her Bachelor of Science degree in Kinesiology and Health at Iowa State University. Bailey is a member of the American Academy of Physician Assistants and the Iowa Physician Assistant Society. She joined Dermatology P.C. in February 2020.

Bianca Patel, P.A.-C.

Bianca is a state licensed Physician Assistant accredited by the National Commission on Certification of Physician Assistants (NCCPA). She earned her Masters of Science in Physician Assistant studies from the University of Nebraska Medical Center after receiving her Bachelor degree in Psychology from the University of Iowa. She is a member of the American Academy of Physician Assistants and the Society of Dermatology Physician Assistants. Bianca joined Dermatology P.C. in February 2018.

Christine Caldwell, P.A.-C.

Christy is a licensed Physician Assistant accredited by the NCCPA. She graduated in 1997 from Des Moines University with a Bachelor of Science in Physician Assistant Studies after completing her Bachelor of Arts in Psychology at Buena Vista College in Storm Lake, Iowa. Prior to joining Dermatology P.C. she worked in family practice. She has over 15 years of clinical experience in various primary care settings. Christy joined Dermatology PC in September 2017.

Elizabeth Hamer, P.A.-C.

Ellie is a state licensed Physician Assistant accredited by the National Commission on Certification of Physician Assistants (NCCPA). She earned her Masters of Physician Assistant Studies from St. Ambrose University after receiving her Bachelor of Science degree in Biokinetics from Bethel University in St. Paul, MN. Ellie is a member of multiple professional organizations and enjoys volunteering throughout the Des Moines area. Ellie joined Dermatology, P.C. in September 2017.

Elizabeth “Liz” McCulloch, P.A.-C.

Elizabeth is a state licensed Physician Assistant accredited by the National Commission on Certification of Physician Assistants (NCCPA). She earned her Master of Physician Assistant Studies degree from St. Ambrose University after receiving her Bachelor of Arts degree in Biology from the University of Northern Iowa. She is a member of the American Academy of Physician Assistants, Iowa Physician Assistant Society, and the Society of Dermatology Physician Assistants. Elizabeth joined Dermatology P.C. in February of 2020.

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.

Megan Ferguson, A.R.N.P., D.C.N.P.

Megan is a state licensed Advanced 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 University of Iowa in 2005. She then continued at the University of Iowa to receive her Masters degree as a Family Nurse Practitioner in 2009. Megan started with Dermatology PC in the fall of 2009. She obtained her certification as a Dermatology Nurse Practitioner (DCNP) in 2013. In 2016, Megan became a director on the Dermatology Nursing Certification Board. She is a member of the American Academy of Nurse Practitioners, Dermatology Nurses Association, and the Society of Dermatology Physician Assistants. She practices in medical dermatology with a specialized interest in phototherapy.

Morgan McGinn, P.A.-C.

Morgan is a state licensed Physician Assistant accredited by the National Commission on Certification of Physician Assistants (NCCPA). She earned her Masters of Science in Physician Assistant studies from Des Moines University after receiving her Bachelor degree in Kinesiology & Health with a minor in Nutritional studies from Iowa State University. Prior to working in dermatology, Morgan worked as a Physician Assistant in Family Medicine in Colorado. She is a member of the American Academy of Physician Assistants and the Society of Dermatology Physician Assistants. Morgan joined Dermatology P.C. in August of 2019.

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.

Stacey Ripchinski, P.A.-C.

Stacey is a state licensed Physician Assistant accredited by the NCCPA. She graduated with her Bachelor of Arts degree from Wartburg College and received her Masters of Science in Physician Assistant Studies from Philadelphia University. Her career began in Cardiothoracic surgery before Dermatology became her desired specialty. Stacey is a member of the American Academy of Physician Assistants. Stacey joined Dermatology, P.C. in February 2016.

Tonia K. Ackerman, M.S.N., A.R.N.P.

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.