Dean N. Silas, MD

Specialty: Gastroenterology

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Advocate Medical Group

7900 North Milwaukee Avenue

Suite 19

Niles, IL 60714

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Office: 847-318-9595

Fax: 847-318-9599

Meet Dean N. Silas, MD

About me

  • Gender:
  • Primary area of focus: Gastroenterology
  • Clinical interests: Biliary Tract DiseaseColonoscopyGERD TreatmentHepatitisInflammatory Bowel DiseaseLiver Disease
  • Related website:



  • Undergraduate Degree: Vanderbilt University
  • Fellowship: University Of Colorado Health Sciences Center
  • Residency: University Of Colorado Health Sciences Center
  • Internship: University Of Colorado Health Sciences Center
  • Medical School: University of Illinois College of Medicine

Board certifications

  • Gastroenterology

Hospital affiliations

  • Advocate Lutheran General Hospital

Insurance accepted

  • AAH Preferred – Team Member Plan
  • AAH Select – Team Member Plan
  • AARP Medicare Advantage Access HMO
  • Aetna Better Health Premier Plan MMAI
  • Aetna Coventry (Aetna Medicare) HMO
  • Aetna EPO
  • Aetna HMO
  • Aetna Managed Choice (MC) POS
  • Aetna Medicare HMO
  • Aetna Medicare POS
  • Aetna Medicare PPO
  • Aetna Medicare Value Plan PPO
  • Aetna NAP - PPO
  • Aetna Open Choice PPO
  • Aetna POS
  • Aetna Premier Care Network
  • Aetna Select
  • Aetna Signature Administrators PPO
  • Aetna State of Illinois HMO
  • Aetna State of Illinois Open Access Plus
  • Aetna State of Illinois PPO
  • Aetna Value Performance Network
  • Beech Street Network PPO
  • Benefit Plan Administrators (BPA)
  • Benefits Services and Systems, Inc
  • Blue Advantage HMO
  • Blue Cross Community FHP
  • Blue Cross Community ICP
  • Blue Cross Community MMAI
  • Blue Cross HMO Illinois
  • Blue Cross Med Select PPO
  • Blue Cross Medicare Advantage HMO
  • Blue Cross Medicare Advantage HMO-POS
  • Blue Cross Medicare Advantage PFFS
  • Blue Cross Medicare Advantage PPO
  • Blue Cross Medicare Supplement PPO
  • Blue Medicare Advocate Health HMO
  • Blue Precision HMO
  • BlueCare Direct
  • Cigna APWU Health Plan Open Access Plus
  • Cigna EPO
  • Cigna Health Partners POS
  • Cigna Healthspring True Choice PPO
  • Cigna HMO
  • Cigna NALC Health Benefits Plan
  • Cigna Open Access Plus
  • Cigna Open Access POS
  • Cigna POS
  • Cigna PPO
  • Cigna-HealthSpring Medicare Advantage HMO
  • Cofinity PPO
  • Coventry / FirstHealth
  • Coventry Health Care HMO
  • Coventry Health Care Open Access POS
  • Coventry Health Care POS
  • Coventry Health Care PPO
  • First Health Network PPO
  • FirstHealth / Coventry Personal Care
  • Galaxy Health Network PPO
  • Great West Healthcare - Cigna EPO
  • Great West Healthcare - Cigna PPO
  • HealthLink PPO
  • HealthSmart Preferred PPO
  • HST Care Connect EPO
  • HST Care Connect PPO
  • Humana Choice POS
  • Humana Community Select HMO
  • Humana HMO
  • Humana Illinois CCN HMO
  • Humana Medicare Advantage HMO
  • Humana Medicare Choice PPO
  • Humana Medicare Gold Plus HMO
  • Humana Medicare Supplement Plan
  • Humana MMAI
  • Humana National HMO
  • Humana National POS
  • Humana National POS - Open Access
  • Humana POS
  • Humana PPO
  • Medicare
  • Meridian
  • Meridian MMAI
  • MultiPlan PPO
  • SEIU – Local 4 HMO
  • SEIU – Local 4 PPO
  • Tricare Prime
  • UFCW Local 1546 Health and Welfare Fund (UMC)
  • UHC / AARP Medicare Advantage Value HMO - POS
  • UHC / AARP Medicare Complete HMO
  • UHC / AARP Medicare Complete Plan 1 HMO
  • UHC / AARP Medicare Complete Plan 2 HMO
  • UHC / AARP Medicare Supplement
  • UHC National Railway Carriers & United Transportation Union Health and Welfare
  • UHC Railroad Employees National Health & Welfare Plan
  • UHC/ AARP Medicare Advantage Choice PPO
  • UniCare PPO
  • Union Health Services, Inc.
  • Union Medical Care PPO
  • United Health One Golden Rule
  • United Healthcare Charter HMO
  • United Healthcare Choice Plus PPO
  • United Healthcare Choice PPO
  • United Healthcare Core PPO
  • United Healthcare Group Medicare Advantage PPO
  • United Healthcare Indemnity
  • United Healthcare Medica
  • United Healthcare Medicare Complete Assure PPO
  • United Healthcare Navigate HMO
  • United Healthcare NexusACO OA
  • United Healthcare NexusACO R
  • United Healthcare Options PPO
  • United Healthcare Oxford
  • Wellcare Health Plans HMO

Ratings and reviews

Overall rating

based on 255 patient ratings.


July 7, 2020 7:59 AM

I was pleased w/the caution the hospital displayed for COVID-19 exposure. The colonoscopy took 5 hours - I sat in a chair waiting for better than 3 hrs., much of that wait was caused by an older EKG when a newer one was available AFTER an ablation. One of the nurses commented that I had the world's longest colonoscopy I understand the delay was a concern for my health and I believe Dr. Silas is terrific at his profession.

July 2, 2020 12:00 AM

Fantastic colonoscopy. No side effects, very happy w/team, including anesthesiologist and nurses.

June 18, 2020 11:24 AM


May 11, 2020 7:01 PM

Dr. Silas was very respectful and helpful. He listed attentively to my questions and we worked together to outline future follow ups related to my EoE.

May 11, 2020 4:01 PM

Excellent experiences with this provider across all visits.

May 11, 2020 4:01 PM

Dr. Silas has been very helpful throughout my visits with him. He was quick to order all the needed tests and diagnose me. He always called me right after results came in to discuss the results and next steps. He is very knowledgeable but explains things in terms I can understand. He also seems to genuinely care and that shows from his quick response time and consistent follow ups.

April 24, 2020 8:46 AM

Dr. Dean Silas is a great gastrologist.

March 31, 2020 6:31 AM

We always have a great experience with Dr. Silas. X is a non-verbal quadriplegic adult who is totally dependent on adults for care. Dr. Silas understands X's needs.

March 31, 2020 6:31 AM

Dr. Silas office is sometimes hard to get in touch with. But the biggest frustration with the office is the hold time when I call the office. I have never called the office and been on hold less than 15-20 mins. I hope they somehow improve the amount of time spent waiting to have an appointment made or a question regarding medication or his J-tube addressed. This is the biggest frustration about the office.

March 27, 2020 9:09 AM

Dr. Silas, is always friendly & takes the time to go over my last visit before he enters the exam rm. The office staff is very welcoming, & very efficient.

March 27, 2020 9:09 AM

I always look to see if Noreen is working. She is very caring & knowledgeable -

March 2, 2020 10:47 PM

Dr Silas always caring and listens to what I have to say and discusses any ongoing issues in regards to GI problems. Has followup visits to assist in making things better and discusses need for any other Specialists I may need to see down the line.

February 25, 2020 11:43 AM

great GI doctor

February 19, 2020 12:17 PM

excellent doctor.

February 8, 2020 8:48 AM

Dr. Silas is very up to date on new meds & procedures...he is the best.

February 8, 2020 6:46 AM

Always a professional, knowledgeable visit.

February 2, 2020 5:43 AM

All your providers are excellent. I haven't had one bad one. Thanks for everything.

January 31, 2020 11:55 AM

Dr. Dean Silas is very specialist. I am very happy that I have so good specialist.

January 28, 2020 1:30 PM

They spend time with me asking a lot of questions and answered my questions.

January 28, 2020 1:30 PM

It was a good experience. Answered what I needed to know.

January 25, 2020 10:19 AM

answered and understood my health issues

January 25, 2020 10:19 AM

very good

January 25, 2020 9:06 AM

explain everything perfect we understood everything he was telling us. very satisfied with everything he explained to us.

January 25, 2020 9:06 AM

will recommend anyone you. I was very satisfied with the over come of everything. thank you

January 13, 2020 9:34 AM

By visit was very good.

January 4, 2020 8:54 AM

Dr. Silas is an amazing doctor. He is smart and clinically excellent of course but his caring manner is what sets him apart. He's an outstanding physician and human being. We refer friends and family to him all of the time and everyone is so pleased!

January 4, 2020 8:54 AM

Dr Silas is excellent! plus his staff is so much better than what we deal with in most of advocate! when calling other offices wait times of 10 minutes or more seem to be "standard". His staff answers promptly and also gets the info to him in a timely manner. Dr Silas is just great!

December 12, 2019 1:14 PM

Dr. Silas is always pleasant, thorough and courteous. I would definitely recommend him to family and friends.

December 4, 2019 11:12 PM

he explained to me clearly everything about my concern and it eases my mind

December 4, 2019 6:50 AM

I enjoy seeing him.

December 3, 2019 2:51 PM

very good

November 27, 2019 9:35 AM

Short/sweet/to the point!

November 27, 2019 9:35 AM

Good - would return - if needed. Felt comfortable. Physical assessment completed and explained.

November 25, 2019 7:03 PM

Dr Silas is always,always easy to understand/he presents things in laymens terms. He's also very thorough, and make suggestions for things I can take OTC for my current issue

November 25, 2019 7:03 PM

In addition to Dr. Silas being respectful & thorough, his new nurse is a pleasant & also thorough person

November 14, 2019 8:15 AM


November 11, 2019 8:18 AM

He was a very good doctor. He asked about my health in the past when I told I had cervical cancer and I was cured from it.

November 11, 2019 8:18 AM

The Advocate doctors are very good doctors cause when I had this cervical cancer they worked together that's why I probably was cured.

November 3, 2019 6:00 PM

I really trust Dr. Silas.

October 21, 2019 7:00 PM


October 19, 2019 7:00 PM


October 18, 2019 7:00 PM

thank you for the visit. and for doing such a god job on me 5 years ago.

October 7, 2019 7:00 PM

Very attentive and caring about my issues. He's trying to figure out what to do and test for to make my condition better

September 26, 2019 7:00 PM

Feel comfortable, attentive to my questions, very knowledgeable.

September 18, 2019 7:00 PM

Great, really great very kind man.

September 8, 2019 7:00 PM

Dr. Silas is always so caring & great bedside manner. I trust him completely for my health care advice.

September 8, 2019 7:00 PM

Dr. Silas is a very good competent person, he always has time to listen and answer questions.

August 26, 2019 7:00 PM

Very professional demeanor. He exuded confidence.

August 25, 2019 7:00 PM

Great Doctor!!!

August 25, 2019 7:00 PM

Dr Silas is one of the most caring and compassionate doctors I see. He always is respectful and understanding of my illnesses

August 21, 2019 7:00 PM

Dr. Silas was very professional and easy to understand.

August 9, 2019 7:00 PM

Dr. Silas seemed to know his field. Had a endoscopy, which went well, nothing found but still have no idea as to what my pain/problem might have been.

August 4, 2019 7:00 PM

Dr. Silas was great - very straight forward, however - the tech got the prescription wrong - I don't know why - then she talked with the doc & came back.

August 4, 2019 7:00 PM

Dr. Silas is my GI doctor, & I consider him an excellent doctor.

August 4, 2019 7:00 PM

Dr Silas is great! Listens and asks questions to clarify symptoms thoroughly. Never appears harried or rushed. He is simply the best.

August 3, 2019 7:00 PM

Aside from the long wait to get an appointment, the visit with Dr. Silas was excellent. Very caring demeanor and outstanding reputation.

July 30, 2019 7:00 PM

Dean Silas is a wonderful physician. He is superb medically. He is thoughtful & caring. He's the best!

July 22, 2019 7:00 PM

Dr. Silas is extremely competent and knowledgeable. He always manages to get to the real issues and how they need to be resolved. I would recommend him highly.

July 1, 2019 7:00 PM

A very good visit.

June 30, 2019 7:00 PM


June 21, 2019 7:00 PM

Doctor Silas is very knowledgeable and thoughtful in his approach to suitable treatment/follow-ups.

June 16, 2019 7:00 PM

I have gone to Dr Silas for years and needed to schedule an overdue Colonoscopy. He is the best!!

June 2, 2019 7:00 PM

Dr. Silas is fantastic. He spends a lot of time with me and ensures that we have covered everything we need to. He never rushes me. He explains things in a way that is easy to understand, and his bedside manner is fabulous.

May 12, 2019 7:00 PM

Nice office. LONG wait to get in.

May 9, 2019 7:00 PM


May 5, 2019 7:00 PM

This was my first appt. with Dr. Silas. He had available and well informed awareness of my GI condition and gave valuable advice going forward.

May 5, 2019 7:00 PM

Very good

May 1, 2019 7:00 PM

Excellent visit.

April 28, 2019 7:00 PM

Thorough. Empathetic.

April 21, 2019 7:00 PM

this was my yearly visit. Dr Silas always listens and answers my questions. It's a shame that he couldn't also be my primary doctor.

April 19, 2019 7:00 PM

visit was good everything I expected to happen happened test scheduled for end of June

April 10, 2019 7:00 PM

Very good.

April 1, 2019 7:00 PM

Dr Silas went beyond the call of duty in my case. He put me in for my colonoscopy in a already tight schedule because this was the only week in my schedule I could do it.

March 23, 2019 7:00 PM

It was a very informative visit, regarding what to expect with my upcoming colonoscopy.

March 11, 2019 7:00 PM

he showed me care and concerns all the visits.

February 21, 2019 6:00 PM

This provider seemed to push a prescription for my problem & said it may be expensive & didn't know if ins. would cover. Ins. does not cover & costs $500.00 and would have to stay on it to effective! Saw my primary MD & gave me a simple solution with OTC options!

February 7, 2019 6:00 PM

Very good visit. Very good doctor.

February 6, 2019 6:00 PM

New computer system in place 1st day of _____. Dr. Silas is great.

January 25, 2019 6:00 PM

excellent doctor. I don't think I can get better care anywhere. very satisfied with the level of care I receive.

January 13, 2019 6:00 PM

Physician knew my medical history & reviewed any changes during visit w/ electronic record

January 13, 2019 6:00 PM

Always a great visit and helpful when trying to figure out cause for issues. Wonderful soft spoken Doctor who cares about his patients.

December 6, 2018 6:00 PM

i've been seeing Dr Silas for many years. He's completely respectful and I trust him completely.

December 1, 2018 6:00 PM

This is the 1st time I saw Dr. Sillas. I was very impressed with him. The only problem I had was that when I called for an appointment the 1st one was in 2 1/2 months! I had a referral from my primary.

November 19, 2018 6:00 PM

Dr. Silas has been my GI dr. for many years I have the utmost confidence in him.

November 2, 2018 7:00 PM

I think Dr. Dean and his staff are "GREAT".

October 25, 2018 7:00 PM

Very resourceful, precise & informative.

October 8, 2018 7:00 PM

The Dr. was very thorough. He explained what the procedure was and what he would be looking for. The whole staff was excellent.

October 7, 2018 7:00 PM

He is excellent very knowledgeable. He refers us to very good specialty doctors.

October 7, 2018 7:00 PM

Routine visit for stomache issues expertly handled and he was very caring and helpful with advice. He's very soft spoken and gives as much time as needed to evaluate and exam. Decisions made jointly and follow up ordered.

September 18, 2018 7:00 PM

I feel appointment was not at all rushed. Dr. Silas reviewed my past history with me for clarification on what was needed and took time to set up schedule for minor surgery in order to accommodate my pending trip. Very comfortable with his guidance and professionalism.

September 10, 2018 7:00 PM

Excellent. Dr. Silas has been my doctor for many years. I have recommended him to many family and friends.

September 3, 2018 7:00 PM

I'm very satisfied with this dr

August 20, 2018 7:00 PM

Dr. Silas was excellent!

July 29, 2018 7:00 PM


July 1, 2018 7:00 PM

I think that Dr. Silas is a wonderful doctor. He listens to me and takes the time necessary to explain his findings and what he suggests.

June 29, 2018 7:00 PM

Dr Silas makes you feel very comfortable.

June 26, 2018 7:00 PM

Very good doctor (the best).

June 26, 2018 7:00 PM

Dr. Silas is one of the best Drs I have ever had experience with. He recognized my concerns and made adjustments to my scheduled procedure to keep me from having a long time to worry. He talked to me about every detail from start to finish. I would recommend him to anyone. He needs to share his style with other Doctors.

June 25, 2018 7:00 PM

Dr. Silas - very thorough, never feel rushed provides helpful medical advice.

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Information listed under the "clinical interests" columns was supplied by the physicians. It is provided to you for informational purposes only, and neither Advocate Health Care nor the Advocate facility has independently verified the information. If you wish to confirm the information contained herein, or if you have any other questions about a particular physician, please contact the physician’s office.

Unless otherwise stated, physicians are independent practitioners who are not employees or agents of Advocate Health Care or the Advocate facility where the care is being provided. Neither Advocate Health Care nor the Advocate facility shall be liable for the medical care provided or decisions made by these independent physicians.

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