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Advanced GI LLC

4.9 out of 5 · 50 reviews

Gastroenterology • North Chicago, IL

About

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Clinic Type

Gastroenterology (multi-location group)

Address

3000 North Halsted Street, Suite 623, Chicago, IL 60657; 2845 North Sheridan Road, Suite 801, Chicago, IL 60657

Phone

847-491-0182

Email

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Opening Hours

Not published — contact the clinic to confirm hours.

Website

https://www.advancedgichicago.com/

Services Offered

Gastroenterology
diagnostic and treatment procedures
upper endoscopy
capsule endoscopy
Bravo pH monitoring
endoscopic ultrasounds
anorectal manometry
radiofrequency ablation for Barrett’s esophagus
hemorrhoid banding
luminal stents
colonoscopy
in-office preventive colonoscopies and screenings

Technology & Equipment

advanced diagnostic technologies
in-office minimally invasive procedures
endoscopic ultrasound
capsule endoscopy
anorectal manometry
Bravo pH monitoring
radiofrequency ablation
hemorrhoid banding
colonoscopy

Team

Michael Flicker, Fellowship-trained gastroenterologist — MD
Carl Atallah, Fellowship-trained gastroenterologist — DO
Manish Dhamija, Fellowship-trained gastroenterologist — MD
Mona Lalehzari, Fellowship-trained gastroenterologist — MD

Insurance & Payment

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We are proud to accept a wide array of insurance companies; please contact the office if your provider is not listed.

Languages Spoken

English
Spanish

FAQs

What services does Advanced GI LLC provide?

Advanced diagnostic and treatment procedures for gastroenterology issues, including minimally invasive procedures in-office (upper endoscopy, capsule endoscopy, Bravo pH monitoring, endoscopic ultrasounds).

Which conditions do you treat?

Conditions like cancer, gastroesophageal reflux disease (GERD), and inflammatory bowel diseases.

What technologies are used on-site?

Upper endoscopy, capsule endoscopy, Bravo pH monitoring, and endoscopic ultrasounds.

What languages are available for patient communication?

English and Spanish.

How can I book an appointment?

Call Advanced GI LLC or book an appointment online.

Photos

What Patients Say

Overall sentiment across review platforms: positive

Tebra: 5.0/5.0 (6 reviews listed on Tebra)
Practice website: 4.84/5.0 (44 reviews collected as of 2023)
Yelp: Not specified (24 reviews as of July 2026)

Patients praise

Professional and friendly staff and doctors
Doctors who are attentive, informative, and take time to listen
High patient satisfaction and recommendation rates
Comprehensive and holistic approach to treatment

Common complaints

Some patients have reported negative experiences regarding patient care

"Hands down the best GI I've been to in all my years. Cannot recommend more. Very informative and takes the time to listen and obviously actually cares."

— Practice website testimonials

"I came in ready to have to fight for myself and advocate on my own behalf. I was really ready for an argument, because I’ve been blown off by doctors in the past. Dr. Atallah blew me away. He listened to everything I had to say..."

— Tebra patient review

"This was one of the worst experiences I have had in doctor- patient care."

— Yelp review

Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].

In the News

New Center Expands Advanced GI Care to Suburban Chicago — Apr 30, 2026
$15 million center for ‘complex’ GI care opens at Central DuPage Hospital – Shaw Local — May 4, 2026
Northwestern Medicine Opens $15 Million Center Expanding Advanced Gastrointestinal Care to Suburban Chicago - Suburban Chicagoland — Apr 30, 2026

Information sourced from the clinic's website as of July 11, 2026.

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