Sioux City, Iowa

Meridian's Sioux City location conducts research for a broad range of investigational treatments. The studies at this site explore vaccines and medicines developed to treat migraines, diabetes, acne, depression, high cholesterol, and other conditions.

For more information about joining a study in Sioux City, complete the form on this page. After you submit your information, a Meridian enrollment specialist will call you to talk about the study. There is no obligation to join — you decide if the study is right for you.

Participating in a study is an important decision — we’re here to help you before, during, and after studies.

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Phone: (712) 639-6200 (call center)

Phone: (712) 639-6300 (clinic)

Meridian Clinical Research
4802 Sunnybrook Dr.
Sioux City, IA 51106

Se habla español

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Meet Your Physician


David Ensz, MD

Dr. Ensz specializes in family practice, obstetrics, pediatrics, and sports medicine.

  • Board certified in family medicine.
  • Received his medical degree from University of Nebraska Medial School in Omaha, NE.
  • Completed a family medicine residency at University of Nebraska Medical School.
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