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Clinic Type

Gastroenterology

Address

2311 N Prospect Ave, Milwaukee, WI 53211

Phone

414-319-3277; tel:414-773-6641; tel:414-226-4020; tel:414-325-4950; tel:262-687-8374; tel:262-948-0720; tel:414-298-7105; tel:262-948-0720

Email

careers@ascension.org

Opening Hours

Monday–Friday 8:00 am – 5:00 pm; Saturday: Closed; Sunday: Closed

Emergency Care

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

Services Offered

  • Gastroenterology

Insurance & Payment

Languages Spoken

  • English
  • Vietnamese

FAQs

What are the hours for Ascension Columbia St Mary's - Gastroenterology (Prospect Ave)?

Monday: 8:00 am - 5:00 pm; Tuesday: 8:00 am - 5:00 pm; Wednesday: 8:00 am - 5:00 pm; Thursday: 8:00 am - 5:00 pm; Friday: 8:00 am - 5:00 pm; Saturday: Closed; Sunday: Closed

Photos

What Patients Say

Overall sentiment across review platforms: positive

  • Health US News (aggregate): 5 out of 5 stars based on 319 ratings (319 reviews (aggregate across internet sources))
  • US News - Ascension SE Wisconsin Hospital-Elmbrook: 4/5 stars (39 reviews)
  • Vitals.com (Dr. Aaron Baltz): Highly recommended by patients (7 detailed reviews)

Patients praise

  • High levels of professionalism and expertise among gastroenterology providers, particularly Dr. Aaron Baltz
  • Patients report feeling comfortable and well-cared for by clinical staff during procedures
  • Clear communication and thorough explanation of conditions and procedures by physicians
  • Efficient scheduling and timely appointments reported by many patients

Common complaints

  • Reports of rude or unhelpful administrative and registration staff at some Ascension SE Wisconsin locations
  • Challenges with insurance verification procedures causing inconvenience for patients

"Patients consistently praise this provider for their professionalism, thoroughness, and caring demeanor. They appreciate the provider's clear explanations, willingness to answer questions, and ability to put them at ease."

US News Health - Patient Experience Summary for Dr. Aaron Baltz

"In addition, GI Associates medical team provided exemplary communication, compassion, and concern from two weeks before the procedure to two days after. Outstanding!"

Vitals.com - Patient Review for Dr. Aaron Baltz

"I’m not sure I have ever been to a hospital where the employees are flat out rude... She had no idea how to handle my Military insurance... This is a huge inconvenience."

LocalityBiz - Patient Review for Ascension SE Wisconsin - Mayfair Road

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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