About

Concordia Mind Health is a psychiatric clinic located in Sioux Falls, SD.

Office hours are Monday through Friday 8:00 AM to 5:00 PM and Saturdays by appointment only.

Current providers accepting new patients include James Chiu, MD, Cassandra Heuer, CNP, PMHNP-BC, and Sarah Siebert, DNP.

James Chiu, MD

  • Undergraduate: Creighton University
  • Medical School: University of South Dakota
  • Residency: USD Psychiatry Program
  • Board certified through the American Board of Psychiatry and Neurology
  • Licensed in South Dakota, Iowa, Minnesota

Cassandra Heuer, CNP, PMHNP-BC

  • Undergraduate: University of South Dakota and South Dakota State University
  • Master’s Program: University of Missouri-Kansas City
  • Board Certified Psychiatric-Mental Health Nurse Practitioner Across the Lifespan through the American Nurses Credentialing Center (ANCC)
  • Licensed in South Dakota, Iowa, and Minnesota

Sarah Siebert, DNP

  • Undergraduate: Presentation College, Aberdeen, SD
  • Doctor of Nursing: North Dakota State University 
  • Board Certified Family Nurse Practitioner Across the Lifespan through the American Association of Nurse Practitioners (AANP)
  • Licensed in South Dakota