


About Dr. Janssen
Seeing patients in Sioux Center
Dr. David Janssen is a bilingual family medicine physician and obstetrician with nearly a decade of experience caring for patients across every stage of life. Known for his kind heart, calm presence, and deep clinical knowledge, he brings thoughtful guidance to every encounter — whether he’s welcoming a new baby into the world or supporting an older adult through memory care.
Dr. Janssen provides full-spectrum care for the whole family. His work spans obstetrics, pediatrics, adult medicine, and geriatrics, making him a trusted guide for everything from prenatal visits to chronic disease management in later years. He takes time to listen and values building lasting relationships with his patients, helping them make confident decisions about their health.
Fluent in Spanish, Dr. Janssen creates a welcoming space for Spanish-speaking patients. His ability to connect across language ensures that care is not only clear but also personal and respectful. His patients often say they feel seen, heard, and understood, no matter their background.
What truly sets Dr. Janssen apart is the quiet strength he brings to his work. Many describe his presence as steady and encouraging. His faith shapes the way he cares, offering wisdom, peace, and hope to patients navigating both joyful and difficult seasons.
Education
Undergrad
Grove City College - Grove City, Pennsylvania
(BS in Molecular Biology, BA in Spanish)
Grad
University of Iowa Carver College of Medicine - Iowa City, IA
Residency
MercyOne Genesis - Quad Cities - Davenport, IA
Professional Membership
American Academy of Family Physicians
Honors & Awards
Spirit of Community Service Award, City of Sioux Center - 2025
Best Dressed Gentleman, Sioux Center Health Foundation Snow Ball - 2025
Services

Medical Clinics
At Sioux Center Health Medical Clinics, we believe exceptional health care starts with a trusted relationship. Our family medicine providers are here to walk alongside you through every season of life, delivering personalized care that meets your unique needs.
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Pregnancy Care
Choosing a physician to deliver your baby is one of the most important decisions you’ll make for your birth experience and your family’s ongoing healthcare. Your OB physician will walk with you through life’s most meaningful moments, from your first prenatal visit to welcoming your baby into the world — and beyond. Whether you’re preparing for your first child or expanding your family, our experienced and caring OB doctors are here to ensure your journey is safe, supportive, and unforgettable.
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Memory Care
We are dedicated to providing comprehensive diagnosis, personalized treatment, ongoing education, and unwavering support for people living with memory concerns.
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Emergency (ER - 24/7)
The Sioux Center Health Emergency Department is here for you 24 hours a day, 7 days a week. Our experienced team of physicians, nurses, and medical professionals is always ready to provide expert care when you need it most.
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