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Clinic Type

Internal Medicine

Address

N112W15415 Mequon Rd, Germantown, WI 53022

Phone

262-250-7800

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

Team

  • Megan M Rotzenberg, Internal Medicine-Pediatrics, Pediatrics — MD
  • Stephanie A Momper, Internal Medicine-Pediatrics — MD

Insurance & Payment

Languages Spoken

FAQs

Do you offer video visits?

Video visits available

Is the clinic accepting new patients?

Accepting new patients

Photos

What Patients Say

Overall sentiment across review platforms: mixed

  • Healthgrades (Dr. Andrew Knoernschild): 4.9/5 stars (121 reviews)
  • Healthgrades (Dr. Amy Miller): 4.4/5 stars (31 reviews)
  • U.S. News & World Report (Dr. Mark Rhyner): Not explicitly stated as numeric, though cited as highly recommended (164 reviews)
  • WebMD (Dr. Alvin Cardona): 4.5/5 stars (5 reviews)
  • Healthgrades (Dr. Julie Heyrman): 4.4/5 stars (8 reviews)
  • Vitals (Dr. Maisha Berry-Hooks): 4.7/5 stars

Patients praise

  • High levels of patient appreciation for providers who are attentive, kind, and take time to listen
  • Strong, positive relationships described as caring and thorough
  • Satisfaction with clinical knowledge and expertise
  • Helpfulness in managing long-term health conditions and preventive care

Common complaints

  • Reports of feeling rushed during appointments
  • Difficulties with administrative tasks such as handling paperwork or rescheduling appointments
  • Concerns regarding billing practices, specifically changes in visit classification affecting insurance coverage
  • Complaints about communication delays with providers or support staff
  • Perceived inability to secure appointments with MDs, with some patients noting reliance on nurse practitioners

"Dr. Andy is very kind and easy to talk to. He takes the time to thoroughly explain the lab results and listen to any concerns."

Patient review of Dr. Andrew Knoernschild

"I do not recommend this doctor. I have seen her for a few years and every single visit I felt rushed. She would get up to leave and i still wasn't done talking about what i wanted to talk about."

Patient review of Dr. Amy Miller

"Shady billing practices. I had my annual physical with my Dr. As part of that physical, they do an annual blood draw that normally is covered by insurance. I had some questions during my visit which prompted them to change my visit from an annual... to a diagnostic... and got billed for things I shouldn’t."

Patient review of Froedtert Germantown Health Center

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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