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Clinic Type

Primary Care

Address

6900 N Port Washington Rd Glendale, WI 53217

Phone

(414) 270-8100

Email

careers@ascension.org

Opening Hours

Not published — contact the clinic to confirm hours.

Services Offered

Team

  • Lisa H Speidel — MD
  • Michael A Martella — DO
  • Michael A Brewer — DO
  • Nancy E Havas — MD
  • Alexandra Diersen — FNP-C
  • Sabrina Ali — MD
  • Jeffrey R Maehl — MD

Insurance & Payment

Languages Spoken

Photos

What Patients Say

Overall sentiment across review platforms: mixed

  • Healthgrades (Dr. Michael Johnstone, MD): 4.0 Star Rating (Based on 14 reviews (8 written))
  • Healthgrades (Dr. Tamim Nawaey, MD): 5.0 Star Rating (Based on 2 reviews (2 written))
  • Healthgrades (Dr. Paul Weisman, MD): 4.5 Star Rating (Based on 4 reviews (1 written))
  • Healthgrades (Dr. Evelyn Burdick, MD): Likelihood of recommending: 3.857143 out of 5 ((Patient satisfaction/review context shown on page; numeric count not provided in snippet))

Patients praise

  • Compassionate, personable care and good listening
  • Clear explanations of conditions/medications and thorough, knowledgeable visits
  • Appointment scheduling and being able to get in quickly for concerns (reported by at least one reviewer)
  • Staff friendliness and office staff kindness

Common complaints

  • Long wait times (reported for some providers/visits)
  • Unsupportive or unfriendly reception/office staff behavior (reported at clinic level)
  • Lower likelihood to recommend for at least one provider
  • Reviews indicate a minority of low ratings (e.g., 1-star share shown for Dr. Johnstone)

"“Everything you could want in a doctor: personable & compassionate, very knowledgeable, explains things in laymen’s terms, and he listens!”"

Healthgrades review excerpt for Dr. Michael Johnstone

"“What a plleasant personality, thorough and knowledgeable doctor. Very, very happy”"

Healthgrades review excerpt for Dr. Tamim Nawaey

"“The receptionist are not very welcoming… they began talking very rudely about one of the doctors and a staff member.”"

a-better-place.com review excerpt for Columbia St. Mary’s Glendale Clinic

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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