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About

Summary: Ascension Illinois is a nonprofit health system headquartered in Chicago, offering primary and advanced specialty care (including cardiology) near home in Illinois, with a focus on patient-centered services. The organization has 41 employees and emphasizes local care delivery across the Illinois market, including Oak Park. Key leadership and departments span medical, operations, and administrative roles, reflecting a broad hospital/healthcare network. If you’re seeking internists near Oak Park, Ascension Oak Park is part of Ascension Illinois’ network and provides general internal medicine services as part of its primary care offerings. For specific internist availability in Oak Park, contact Ascension Oak Park or visit healthcare.ascension.org/illinois to locate a nearby internist or primary care physician.

Clinic Type

Internal Medicine

Address

1100 Lake St Ste Ll21, Oak Park, IL 60301

Phone

Not provided in excerpt

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

  • Charlemagne G Guerrero — MD
  • Owais W Lodhi — MD
  • Nancy A Zamora — MD
  • Karen E Hawk — APN
  • Gopika Chandra — MD, FACP, PhD
  • Predrag Z Simovic — MD
  • Ema Dzaka-Dizdarevic — MD
  • Lisa S Greising — MD

Insurance & Payment

Languages Spoken

FAQs

What are the clinic's hours?

Not provided in excerpt

Photos

What Patients Say

Overall sentiment across review platforms: mixed

  • Ascension official provider directory: 4.7 to 5.0 out of 5 stars for various individual internists listed on Ascension's portal (Ranges from 34 to 342+ reviews depending on the provider)
  • WebMD Care: 4.0 to 5.0 out of 5 stars (11 to 39 ratings each)

Patients praise

  • High ratings for individual internists for communication, thoroughness, and care
  • Doctors described as energetic, caring, and attentive listeners
  • Patients report positive, long-term relationships with specific providers

Common complaints

  • Reports of unprofessional and rude staff behavior
  • Difficulties with phone communication and appointment scheduling
  • Challenges and delays in obtaining referrals
  • Complaints regarding complex medical billing and customer service interactions

"Dr. Weinstein and I go way back... She is worth the drive. I had pneumonia five years ago and she called me everyday for a week to check on me. She takes the time to listen."

Vitals review for Dr. Karen Weinstein

"Damita is SUPER UNPROFESSIONAL. She argued with me... I literal heard her discussion MY THINGS with other people which is A HUGE HIPPA violation."

Review on BirdEye for Ascension Medical Group Oak Park Medical Center

"Totally incompetent staff. Don’t answer their phones... After THREE DAYS of trying and failing to get a hold of anyone on the phone, I went into the office. The older lady that helped me had no idea what a referral was."

Review on LocalityBiz for Ascension Medical Group Oak Park Medical 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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