
Highlights
Age Groups Seen
- Adults
Languages
- English
- Russian
Provider Gender
MaleAbout Michael Koss and Banner Safety Practices
Care Philosophy
My goal is to provide excellent care to all of my patients.
Specializing In
Acid reflux/GERD
C.Diff
Cirrhosis
Colitis
Colon Cancer
Crohn's Disease/Ulcerative Colitis
Diverticulitis
EGD Consult
Elevated liver enzymes
Gastric ulcers
Hepatic Fibrosis
H Pylori
IBD
Pancreatitis
Interests & Activities
I enjoy literature, martial arts and learning about history.
Hospital Affiliations
Banner Boswell Medical Center
Banner Del E Webb Medical Center
Expertise
Education
- Fellowship: University of Illinois at Chicago, Gastroenterology, 2001
- Residency: University of Connecticut School of Medicine, Internal Medicine, 1998
- Medical School: Umdnj Robert Wood Johnson Medical School, 1995
Board Certifications
- Internal Medicine: American Board of Internal Medicine, 2019
- Gastroenterology: American Board of Internal Medicine/Gastroenterology, 2019
Video
Locations
- Banner Gastroenterology Center
- 13640 North Plaza Del Rio Boulevard, Peoria, AZ 85381
- phone: 623-876-3800
- fax: 623-285-2609
Testimonials
4.5 out of 5.0
525 ratingsAll patient experience ratings and testimonials are submitted by actual patients and verified by a leading independent customer experience company. Patient identities are withheld to ensure confidentiality and privacy.
- 5 out of 5 starsReviewed on 11/29/2025
Very attentive and professional
- 5 out of 5 starsReviewed on 11/23/2025
Great physician. Very professional and easy to talk to. Dr. Koss listens to what I have to say.
- 5 out of 5 starsReviewed on 10/27/2025
Dr Koss listens to what I have to say, he is very courteous and professional. I have recommended him to family and friends
- 5 out of 5 starsReviewed on 10/3/2025
Michale Koss was very good and I was well taken care of
- 5 out of 5 starsReviewed on 9/20/2025
Personable. Had done all my colonoscopies. Refereed by Dr. Fein.
- 5 out of 5 starsReviewed on 9/3/2025
Very good at listening, caring
- 5 out of 5 starsReviewed on 8/2/2025
He was very attentive.
- 5 out of 5 starsReviewed on 7/8/2025
I felt he listened to my concerns.
- 5 out of 5 starsReviewed on 7/2/2025
Very good customer service
- 5 out of 5 starsReviewed on 6/26/2025
We appreciate Dr. Koss's mannerisms and warm communications with my wife from Day 1.
- 5 out of 5 starsReviewed on 6/23/2025
Listens to your concerns and addresses them
- 5 out of 5 starsReviewed on 5/19/2025
I love all my doctors with Banner Health!
- 5 out of 5 starsReviewed on 12/21/2024
Easy to talk to. On time.
- 5 out of 5 starsReviewed on 9/12/2024
He has been my GI Dr for many years. He's very knowledgeable and professional
- 5 out of 5 starsReviewed on 9/12/2024
He is pretty much business. Got a job to do let's get it done.
- 5 out of 5 starsReviewed on 9/11/2024
Very pleasant. This was my second round with him and he is very likable.
- 5 out of 5 starsReviewed on 8/21/2024
The Dr was very professional and answered all my questions.
- 5 out of 5 starsReviewed on 8/18/2024
He cares and is Professional in the way he approaches his Patients
- 5 out of 5 starsReviewed on 8/16/2024
Wonderful doctor
- 5 out of 5 starsReviewed on 8/11/2024
I appreciate Dr Koss being the one to do my colonoscopy. He made me feel comfortable.
- 5 out of 5 starsReviewed on 8/10/2024
He is a bright intelligent, caring doctor.
- 5 out of 5 starsReviewed on 8/5/2024
Very kind, and professional. Explained everything perfectly. He treated me with dignity and kindness.
- 5 out of 5 starsReviewed on 8/5/2024
He addressed all my quesrtions, patienly and ith detail
- 5 out of 5 starsReviewed on 8/4/2024
He's a personable Dr Makes you feel like you're in safe and confident hands, surrounds himself with a Great surgical staff
- 5 out of 5 starsReviewed on 8/1/2024
He listened carefully to my issues and allowed me to voice my concerns about certain medications.
- 5 out of 5 starsReviewed on 7/28/2024
Explained things well
- 5 out of 5 starsReviewed on 7/21/2024
He was very professional
- 5 out of 5 starsReviewed on 7/18/2024
He was on point, and explained himself
- 5 out of 5 starsReviewed on 7/15/2024
He was professional, friendly and thorough. He was able to care for my husband several months earlier as well.
- 5 out of 5 starsReviewed on 7/15/2024
He was very nice
- 5 out of 5 starsReviewed on 7/11/2024
Very straightforward and professional doctor and staff made me completely comfortable.
- 5 out of 5 starsReviewed on 7/11/2024
Professional and personable
- 5 out of 5 starsReviewed on 7/7/2024
Good bedside manner, very thorough, renders patient care with dignity and grace. Thank you Dr. Koss.
- 5 out of 5 starsReviewed on 7/4/2024
Courteous, kind and pleasant.
- 5 out of 5 starsReviewed on 6/30/2024
He was very understanding and helpful.
- 5 out of 5 starsReviewed on 6/30/2024
He is very Direct and to the point
- 5 out of 5 starsReviewed on 6/23/2024
He was very pleasant and answered my questions. Not exactly on time, but not far off. Everything went well.
- 5 out of 5 starsReviewed on 6/21/2024
He was great!!!
- 5 out of 5 starsReviewed on 6/20/2024
I had a good experience with my visit with Dr Koss
- 5 out of 5 starsReviewed on 6/19/2024
He was very stress free, he explained what he did and got me my results very quickly.
- 5 out of 5 starsReviewed on 6/6/2024
Good doctor.
- 5 out of 5 starsReviewed on 5/22/2024
Made me feel very comfortable and answered my questions
- 5 out of 5 starsReviewed on 5/9/2024
He answered all my questions
- 5 out of 5 starsReviewed on 5/6/2024
I felt comfortable with him and he took great care of me.
- 5 out of 5 starsReviewed on 5/3/2024
Thoroughly explained procedure and follow up. Communication was excellent
- 5 out of 5 starsReviewed on 12/10/2023
He really listened to me and made me feel valued.
- 5 out of 5 starsReviewed on 12/7/2023
He gets right to the point.
- 5 out of 5 starsReviewed on 9/6/2023
Dr. Koss takes the time with his patients and helps them understand what is going on and offers solutions to address and take care of the problem in a way you can understand.
- 5 out of 5 starsReviewed on 8/13/2023
I trust him.
- 5 out of 5 starsReviewed on 7/31/2023
Very knowledgeable.
- 5 out of 5 starsReviewed on 7/10/2023
He listens to your concerns and then offers ways he can help you
- 5 out of 5 starsReviewed on 6/26/2023
Companionable, knowledge and eager to address my concerns
- 5 out of 5 starsReviewed on 5/22/2023
He was pleasant, caring and listened to me.
- 5 out of 5 starsReviewed on 5/18/2023
Genuinely interested in my needs, not hurried
- 5 out of 5 starsReviewed on 5/16/2023
Dr Koss is very thorough
- 5 out of 5 starsReviewed on 5/15/2023
Dr Koss is professional, cares about his patients and has accumulated vast knowledge, and understands how to best treat ailments presented.
- 5 out of 5 starsReviewed on 5/5/2023
Muy buen servicio
- 5 out of 5 starsReviewed on 5/4/2023
He is a very thorough, caring and compassionate physician. He takes time to listen to you and your concerns and makes sure that all of your questions are answered.
- 5 out of 5 starsReviewed on 4/2/2023
I like him!
- 5 out of 5 starsReviewed on 3/12/2023
Good doctor.
- 5 out of 5 starsReviewed on 3/5/2023
Doctor listens to my concerns.
- 5 out of 5 starsReviewed on 3/2/2023
I'm glad I was recommended to Dr. Koss! Very thorough and I feel like I will still receive the best care possible.
- 5 out of 5 starsReviewed on 2/26/2023
He understood my issues. He listened intently and delivered his recommendations. Very direct and to the point.
- 5 out of 5 starsReviewed on 2/22/2023
He's friendly and cares about his patients.
- 5 out of 5 starsReviewed on 12/10/2022
Scheduling was easy and no waiting at the office. I also like Dr Koss.
- 5 out of 5 starsReviewed on 10/23/2022
Dr. Koss' genuine concern, humor, and loyalty to his patient's whether during routine medical appointments or when we are hospitalized. He makes himself readily available which is a rarity for my husband and I.
- 5 out of 5 starsReviewed on 6/11/2022
Dr. Koss' office is well organized and the staff is congenial and professional. I have had interactions with his department for many years and they are always great.
- 5 out of 5 starsReviewed on 3/10/2022
I didn't feel scared or embarrassed to express my concerns. I felt like Dr. Koss listened and believed my symptoms. Everyone was really kind.
- 5 out of 5 starsReviewed on 11/29/2021
Easy to get to, to check in and didn't have to wait-. Have seen Dr. Koss before and like him as at Dr.
- 5 out of 5 starsReviewed on 10/22/2021
There was no wait time. Everyone is very conscientious about Covid guidelines. Staff is very friendly and courteous. Doctor Koss is very efficient and great about spending time to answer any questions.
- 5 out of 5 starsReviewed on 9/30/2021
No matter in person or via phone I find Dr Koss to be kind, engaged and providing excellent expert care.
- 5 out of 5 starsReviewed on 7/12/2021
Felt comfortable. Met with Dr. Koss in person made me feel important and gave me confidence in my upcoming procedure.
- 5 out of 5 starsReviewed on 7/26/2020
I was seen by the nurse and Doctor shortly after checking in. Both were pleasant and informative. I was very pleased.
- 5 out of 5 starsReviewed on 7/14/2020
It is a very convenient location for me. It's clean and I like the doctor I have there.
- 5 out of 5 starsReviewed on 7/3/2020
Everyone that works there is awesome. The staff was so nice and helpful. The Dr listened to me and addressed my concerns. They made me feel like they really cared.
- 5 out of 5 starsReviewed on 5/22/2024
He listens to my needs and we always agree on my care plan and orders for my home health provider
- 5 out of 5 starsReviewed on 5/14/2024
Provider was nice, friendly and explained everything! The procedure was a success and all is well.
- 5 out of 5 starsReviewed on 1/28/2024
He's a kind and competent physician.
- 5 out of 5 starsReviewed on 10/19/2023
He is an excellent doctor.
- 5 out of 5 starsReviewed on 5/15/2023
Very helpful
- 4 out of 5 starsReviewed on 5/9/2024
Friendly, knowledgeable. Good listening skills
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