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Sanford Internal Medicine Clinic in Sioux Falls, SD is part of Sanford USD Medical Center, a medical practices organization based in Sioux Falls. The page notes Sanford USD Medical Center’s presence and basic company details but does not provide specific information about an individual “Internal Medicine Clinic” location. The broader Sanford USD Medical Center listing indicates: - Industry: Medical Practices - Location: Sioux Falls, South Dakota - Employees: 32 - Part of Sanford Health network (Sanford Health-related facilities in the region) If you’re seeking a specific internal medicine clinic in Sioux Falls, you may want to search Sanford Health’s locations directory or contact Sanford USD Medical Center directly for the exact internal medicine clinic address, hours, and physicians.

Clinic Type

Internal Medicine

Address

1321 W. 22nd St., Sioux Falls, South Dakota 57105

Phone

(605) 404-4000

Email

angela.dejene@sanfordhealth.org

Opening Hours

Mon - Fri: 8:00 AM - 4:00 PM

Services Offered

  • Internal Medicine
  • Preventive care
  • Medication management
  • Immunizations
  • Gastrointestinal issues
  • Thyroid disease
  • Colds and flu
  • Genetic Counseling
  • Vascular Care
  • Sclerotherapy
  • Laboratory Hours
  • Preventive health exams

Team

  • Robert Behrend — MD
  • Megan Bell — CGC
  • Jenna Gassman — DO
  • Elizabeth Hart — MD
  • Eric Larson — MD
  • Derek Lee — MD
  • Mark Lounsbery — DO
  • David Nelson — MD
  • Ukamaka Nwadibia — MD
  • Dylan Platt — CGC
  • Sara Ruter — MD
  • Erin Terpstra, MD, PhD — MD

Insurance & Payment

Languages Spoken

FAQs

What are the clinic hours?

Mon - Fri: 8:00 AM - 4:00 PM

Photos

What Patients Say

Overall sentiment across review platforms: mixed

  • Sanford Health official website: 4.7 out of 5 stars (based on 245 ratings) for specific providers (e.g., Dr. Robert Behrend) (245 ratings)
  • Birdeye (aggregating Google reviews): 3.0 out of 5 stars (6 reviews)

Patients praise

  • Physicians and providers praised for being caring, attentive listeners, and professional
  • High satisfaction with individual clinical care provided by specific doctors
  • Helpful and exceptional customer service from nursing and support staff in certain instances

Common complaints

  • Billing and insurance concerns, including surprise bills and potential overcharging
  • Long wait times for appointments with primary care providers
  • Perceived lack of personalized care or being treated like an insurance claim
  • Concerns regarding professionalism and responsiveness of administrative staff

"Dr Terpstra is such a pleasant, caring person who really takes the time to listen to you as a patient and do what is best for you."

LocalityBiz (customer review)

"This place is a JOKE. If you WANT to be treated like a human and not an insurance claim then go somewhere else."

Birdeye (customer review)

"I was charged for 2 office visits for my appointment... This is corrupt and dishonest."

BBB (complaint summary)

Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].

Information sourced from the clinic's website as of July 11, 2026.

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