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Clinic Type

Primary Care

Address

1855 S Koeller St, Oshkosh, WI 54902

Phone

223-7010

Email

careers@ascension.org

Opening Hours

Not published — contact the clinic to confirm hours.

Emergency Care

If you are experiencing a life-threatening emergency, call 911 or go directly to the ER.

Services Offered

  • Primary Care
  • Family Medicine
  • Internal Medicine

Team

  • Katherine Hartstern, MD — Physician (Family Medicine)
  • Kristian N Bastress, DNP — Advanced Practice Provider (Internal Medicine)
  • Weston W Radford, MD — Physician (Internal Medicine)
  • Sara J Kolell, APNP — Advanced Practice Provider (Internal Medicine)
  • Sandralee S Quade, APNP — Advanced Practice Provider (Internal Medicine)
  • Brenda L Brusky, APNP — Advanced Practice Provider (Internal Medicine)
  • Rebecca L Ott, APNP — Advanced Practice Provider (Internal Medicine)
  • Andrea L Verhagen, APNP — Advanced Practice Provider (Family Medicine)

Insurance & Payment

Languages Spoken

Photos

What Patients Say

Overall sentiment across review platforms: mixed

  • Ascension official website (healthcare.ascension.org): generally high ratings for individual providers on Ascension's platform, typically ranging from 4.5 to 5.0 stars based on hundreds of reviews each (hundreds of ratings per provider across multiple pages on the official Ascension website)
  • Birdeye (aggregating Google reviews): varied ratings on external third-party sites; some locations show high averages (4.3-4.7) while others reflect more critical feedback

Patients praise

  • high patient satisfaction ratings for individual providers (often 4.5+ stars)
  • providers described as professional, smart, and compassionate
  • staff often perceived as nice and welcoming
  • satisfaction with the ease of scheduling and availability of appointments

Common complaints

  • billing issues
  • long wait times for appointments and in waiting rooms
  • concerns regarding physician bedside manner and communication
  • perceived lack of professionalism or care from certain support and nursing staff

"The checkin desk, nurse, nurse practitioner and doctors are wonderful. The billing is TERRIBLE!! Constantly have to fight our bill"

Birdeye review for Ascension Medical Group WI - Deerwood Ave

"The doctors in walk in range from incompetent to indifferent. They don't answer questions, don't actually test or investigate problems."

Birdeye review for Ascension Medical Group WI - Main Street

"Megan is an amazing doctor. She is professional, smart, polite but yet to the point. I won't go to any other diabetic doctor."

Birdeye review for Ascension NE Wisconsin - Midway Place

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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