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Sioux City, Iowa

Meridian's dedicated research center in Sioux City conducts clinical research trials 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.

About this dedicated research site

Meridian's Sioux City research site performs clinical trials related to general medicine and infectious diseases, including vaccine studies for people of all ages. Principal investigator David Ensz, MD, is board certified in family medicine and specializes in family practice, obstetrics, pediatrics, and sports medicine.

Trials for healthy adults and more

This location conducts clinical studies for healthy adults and children, as well as clinical trials related to conditions such as:

  • Acne
  • Allergies
  • Anxiety conditions
  • Chronic diseases
  • Chronic pain
  • Depression
  • Diabetes
  • High blood pressure
  • High cholesterol
  • Hyperlipidemia
  • Hypertension
  • Infectious diseases
  • Influenza
  • Migraine headache
  • Smoking cessation
  • Urinary incontinence
  • Vaccines
  • Viral infections

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.

Meridian Clinical Research logo.

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

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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