Physicians and Staff

Neil Mandsager, M.D., FACOG

Dr. Mandsager started Perinatal Center of Iowa, LLC, in 1993. Born in Cameroon (a country located in west-central Africa), he was raised in Marshalltown, Iowa, and attended Wartburg College. He graduated from the University of Iowa College of Medicine and completed his OB-Gyn residency in Columbia, Mo., before spending four years in the U.S. Air Force. After that, Dr. Mandsager completed a Maternal-Fetal Medicine Fellowship in Cincinnati, Ohio. He is currently board-certified in Obstetrics-Gynecology and Maternal-Fetal Medicine.

Dr. Mandsager lives in Johnston with his wife and has five children. In his spare time, he enjoys spending time with his family, taking photographs and watercolor painting. Dr. Mandsager is also a board member for ChildVoice International, an organization seeking to restore the voices of Ugandan children silenced by war.

Michael Cardwell, M.D.
Dr. Cardwell joined Mercy's Perinatal Center of Iowa in 2014. Dr. Cardwell is from Indiana, where he attended Purdue University for his undergraduate degree and received his medical degree from Indiana University School of Medicine. After completing his residency in obstetrics and gynecology at the University of Illinois-Peoria, Dr. Cardwell attended Baylor University for his maternal fetal medicine fellowship. He is board-certified in obstetrics and gynecology and maternal fetal medicine. Prior to joining Mercy's Perinatal Center of Iowa, Dr. Cardwell was an associate professor and director of labor and delivery at Texas Tech University Health Sciences Center in El Paso, Texas. His special interests are preterm labor, diabetes in pregnancy and obstetrical ultrasonography.

Leah Bruxvoort, ARNP
Leah is a nurse practitioner at Mercy's Perinatal Center of Iowa. She earned her degree from Clarkson College in Omaha, Neb. Leah has earned credentials from the American Nurses Credentialing Center and belongs to the American Association of Nurse Practitioners.


Amie Dawes, PA-C

Amie is a physician assistant with PCI. She earned her undergraduate degree from Iowa State University before attending Des Moines University’s Physician Assistant program. Amie is board-certified by the National Commission on Certification of Physician Assistants.

Kate Wallace, ARNP
Kate is a nurse practitioner with PCI. She attended Central College and Grand View College before receiving her graduate nursing degree from the University of Kansas Medical Center. She is board-certified by the American Nurses Credentialing Center.

Cindy Johnson, MS, CGC

Cindy is the genetics counselor at PCI. She received her Bachelor of Science degree from Fort Hays State University before graduating from the University of North Texas with a Master of Science degree in Human Genetics. Cindy is a charter member of the American Board of Genetic Counseling and currently maintains her certification through that organization. She is also a member of the National

Society of Genetic Counselors.

Laura Olsen, CNM, ARNP

Laura is a nurse practitioner with PCI. She attended Central College and Grand View College before receiving her graduate nursing degree from the University of Minnesota. She is board-certified through the American Midwifery Certification Board.


Our dedicated team of sonographers specializes in high-risk obstetric ultrasounds. Our sonographers have the education, experience and expert knowledge of performing these diagnostic tests to give the most accurate results.


What is a perinatologist?

A perinatologist is an obstetrician/gynecologist who has completed several years of additional training in maternal and fetal complications of pregnancy (maternal-fetal medicine).

As perinatologists, Dr. Mandsager and Dr. Hwang provide:

  • Total prenatal care for patients with high-risk pregnancies
  • Consultation and recommendations for pregant patients under the care of another health care provider
  • Basic and advanced ultrasounds for pregnatn women
  • Genetic screening and prenatal diagonostic testing
  • Pre-conception counseling to women to assess overall health, pregnancy related risks and recommendations to optimize future pregnancies

Why is board-certification important?

Board-certification is a voluntary process which demonstrates a doctor’s exceptional expertise in a particular specialty and/or subspecialty of medicine. Board-certification shows a physician’s voluntary participation in lifelong learning to keep their skills current, demonstration of their commitment to quality clinical outcomes, patient safety and a responsive, patient-centered practice.

PCI doctors are board-certified in both general Obstetrics/Gynecology and Maternal-Fetal Medicine (Perinatology) and are Fellows of the American College of Obstetrics and Gynecology.