Public provider listing

Ammar Hassan, DO

4.5(22)

Ammar Hassan, DO is a Gastroenterologist practice in Munster, IN. Rated 4.5 from 22 public reviews. Phone and website are listed.

Address

9410 Calumet Ave Ste 401, Munster, IN 46321
Munster, IN 46321

Public hours

Listed hours

As published
Monday
8AM–5PM
Tuesday
8AM–5PM
Wednesday
8AM–5PM
Thursday
8AM–5PM
Friday
8AM–4PM
Saturday
Closed
Sunday
Closed
Verified listing details

Credentials, affiliations, and coverage

Checked Aug 27, 2026

Sources

Federal data is attributed to its source and does not imply CMS endorsement.

Public media

Newest photos

Up to 10

No public photos are available for this listing.

Public reviews

Newest reviews

Up to 10

Steve Brajak

5.0

Very pleasant. Easy to talk to and very understanding.

michael rakoczy

5.0

Great service for my knee, really friendly since I visited the Ammar Hassan DO. Done very well there in treatments. Thank you

Allison Bruns

1.0

I’ve been having stomach issues the last month. My pcp gave me a referral to see Dr. Ammar Hassan. I called the office to make an appointment, the lady was very nice on the phone. I explained to her what was going on and how miserable I was feeling. She said there was a cancellation the next day or another day in July available. I obviously took the next day appointment. While I was on the phone with her for about 10 minutes explaining what was wrong and personal info needed. She told me I didn’t need to bring my referrals as It was in the system and everything was good to go for the next day appointment. I showed up about 45 minutes early for if I needed to fill any paper work out. They asked what my name was and she kept asking me other questions like, what’s you birthdate, home address etc. then I was told I had no appointment. At this point confused and getting upset because I made the appointment the day prior with no issues. I was then told the doctor I was suppose to see wasn’t even there and was out of town. My question is, how in the heck do you tell me on the phone I have the appointment after you talk to me for 10 minutes asking for all my personal information then get told I didn’t have one. I’m extremely disappointed with this office and staff for being unorganized. You should be ashamed of your selfs. I hope you don’t do this to anyone else in the future especially with how much pain that person is in or help they need. Now I’m back to a constant circle of trying to see a doctor to help me get better.

Vincent Depisa

5.0

One of if not the best Doctors I’ve ever dealt with he answers your questions because he cares a breath of fresh air in my book

Maricris Martin

5.0

Had a very good experience with this Doctor and advised me to have an urgent surgery glad he recommend the surgeon that its an ASAP, thank you. Definetly recommend this doctor.

Tana Starkey

5.0

Dr. Hassan was very cordial, professional and personable and the staff was very kind and helpful :D

Tara Homams

5.0

Simply put, Dr Hassan is an AMAZING Doctor!!!! I had another GI years ago before I starting seeing Hassan and that doctor doesn't even have a candle to hold!!! Personality 100%, professional 100%, compassionate 100%. His nurse practitioner is also completely amazing!!!!

Bill

5.0

No written review was provided.

Irithylle Nichole

5.0

One of the best doctors I've met, he will definitely take great care of you. Listens to what you say and eliminates possibilities suggests tests etc. Very compassionate and knowledgeable.

Donna G.

5.0

I am very happy to have you continue to help my husband and I on our wellness journey.

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