Our caring staff is committed to helping the community stay healthy. We have a full staff of doctors, nurses, clinicians and administrative employees working to make your visit a positive experience.

Our Medical Staff

Meet our medical staff of doctors, physician assistants and nurse practitioners.

LoriAnne Andersen, MD

Phone: 712-722-8388
Bachelors Degree: University of South Dakota, Vermillion, SD 2000
Medical Degree: University of South Dakota School of Medicine, Vermillion, SD 2004
Certification: American Board of Family Medicine
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Jian-zhe Cao, MD

Specialty: General Surgery
Education: University of Colorado, Denver
Residency: Exempla Saint Joseph Hospital, Denver
Certification: American Board of Surgery
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Robert Clemens, MD

Phone: 712-722-8380
Bachelors Degree: Northwestern College, Orange City, IA 1989
Pre-Med Education: Dordt Collge, Sioux Center, IA 1990
Medical Degree: University of Iowa, Iowa City, IA 1997
Certification: American Board of Family Medicine
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Richard A. (Dick) Jongewaard, MD

Phone: 712-722-8397
Bachelors Degree: University of Iowa, Iowa City, IA 1968
Medical Degree: University of Iowa, Iowa City, IA 1973
Certification: American Board of Family Physicians
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Jason Koelewyn, MD

Phone: 712-722-8427
Bachelors Degree: Dordt College, Sioux Center, IA 1999
Medical Degree: Loma Linda Medical School, Loma Linda, CA, 2005
Certification: American Board of Family Physicians
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Julie McKay, MD

Phone: 712-722-8116
Bachelors Degree: University of North Dakota, Grand Forks, ND 1984
Medical Degree: University of North Dakota, Grand Forks, ND 1988
Residency: University of Nebraska Medical Center, Omaha, NE
Certification: American Board of Radiology

Shahid Naqvi, MD

Specialty: General Surgeon
Status: Active Medical Staff Member
Education: Dow Medical College, University of Karachi
Residency: St. Agnes Hospital, Baltimore
Certification: American Board of Surgery

M. Yvonne Rayborn, MD

Phone: 712-722-8398
Bachelors Degree: Oral Roberts University, Tulsa, OK 1986
Medical Degree: Oral Roberts University, Tulsa, OK 1990
Certification: American Board of Family Medicine
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Scott Rens, MD

Phone: 712-439-1315
Bachelors Degree: Dordt College, Sioux Center IA 1988
Medical Degree: University of Iowa College of Medicine, Iowa City, IA 1992
Certification: American Board of Family Medicine
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Roy Slice, MD

Specialty: Emergency Medicine
Bachelors Degree: Stanford University, California 1975
Medical Degree: University of New Mexico, New Mexico 1984
Residency: University of Kansas, Kansas, 1987
Certification: American Board of Family Medicine

Mark Stelzer, MD

Specialty: General Surgeon
Status: Active Medical Staff Member
Education: University of Nebraska School of Medicine, Omaha
Residency: Riverside Methodist, Columbus
Certification: American Board of Surgery and Emergency Physicians

Gerald L. Van Es, MD

Phone: 712-722-2761
Bachelors Degree: Northwestern College, Orange City, IA 1971
Medical Degree: University of Iowa, Iowa City, IA 1975
Certification: American Board of Family Physicians
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Jamie Vitamvas, MD

Phone: 712-439-1315
Bachelors Degree: Creighton University, Omaha, NE 2006
Medical Degree: University of South Dakota Sanford School of Medicine, Sioux Falls, SD 2010
Certification: American Board of Family Physicians
Learn more about Dr. Vitamvas

Jeanne Kleinhesselink, DNP, ARNP

Phone: 712-722-8396
Bachelor's Degree: Briar Cliff College, Sioux City, IA 1991
Nurse Practitioner Degree: South Dakota State University, Brookings, SD 1994
Certification: American Nurses Credentialing Center
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Sarah Cam, ARNP

Bachelor's Degree: Augustana College, Sioux Falls, SD 1999
Nurse Practitioner Degree: Briar Cliff University, Sioux City, IA 2013
Certification: American Association of Nurse Practitioners

Specialists

Our medical clinic team is backed by a staff of specialty physicians from throughout the region. We have over 35 visiting physicians and nurses providing expert care for our community.

Administration

Our administration staff is committed to providing the best healthcare to the Sioux Center community.

  • Stan Speer, Hospital Board President
  • Kayleen Lee, Chief Executive Officer
  • Mary McClung, Clinic Services Officer
  • Jackson Schuiteman, Chief Financial Officer
  • Theresa Tucker, Human Resources Officer
  • Marilyn Ver Meer, Nursing/Quality Services Officer
  • Joe Heitritter, Senior Services Officer