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Dr. Andy Koo, MD

Dr. Andy Koo, MD

Gastroenterology*

Dr. Andy Koo, MD is a gastroenterologist in Emerson, NJ. He is affiliated with medical facilities Hackensack Meridian Health Pascack Valley Medical and Valley Hospital. He is accepting new patients and telehealth appointments.

4 Star Rating
Based on 44 reviews 4 Star Rating (44 reviews)

Bergen Medical Associates

466 Old Hook Rd Ste 1 Emerson, NJ 07630
Telehealth available

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Compare with other Gastroenterologists

Compare Dr. Koo with our nearby Gastroenterologists at Clara Maass Medical Center.

Make an appointment at Clara Maass Medical Center today at
(973) 765-6593.

Dr. Koo is a Healthgrades Choice provider in Gastroenterology

The Healthgrades Choice designation helps you understand the most important factors to consider when choosing a healthcare professional. This designation is earned based on four set standards.
Read our methodology

  • Above average experience
  • Good hospital quality
  • Good patient ratings
  • No healthcare sanctions

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Dr. Koo's Reviews

Likelihood to recommend Dr. Koo

4.0
44 ratings, 34 with a written review
5 star
73%
73%
4 star
2%
2%
3 star
0%
0%
2 star
2%
2%
1 star
23%
23%

Your trust is our top concern.

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Totally disinterested
I described my longstanding GI symptoms. He was not interested. Brushed me off. Very short first visit.
What went well
  • Appointment scheduling
What could be improved
  • I didn't feel respected
  • Didn't listen or answer questions
  • Appointment was rushed
Helpful
Barbara Riso, R.N. – Mar 11, 2025
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such a great experience
phenomenallearned more about my health from 20 minutes w Dr Koo then the 5 years that I had with my previous GI.very knowledgeable - and really conveys information in an easy to understand way
What went well
  • I felt respected
  • Appointment wasn't rushed
What could be improved
No results
Helpful
Susan – May 18, 2024
Thank you so much, Susan, for your feedback and... Read More
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great doctor
excellent physicianhave been seeing him for many years
What went well
  • I felt respected
  • Appointment scheduling
  • Explained conditions well
  • Staff friendliness
What could be improved
No results
Helpful
Lauren – Apr 12, 2024
Hello Lauren, thank you for your kind review! We... Read More
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SO RUDE
I have never met a less compassionate doctor. I am not surprised he has so many negative reviews. He didn't listen to anything I was saying, rushed me out and didn't look at my CHART. He told me not to take both antibiotics prescribed without knowing that I had METHANE sibo because he didn't look at my results which I brought a paper copy of. One antibiotic only works 30% of the time. Both work 85% of the time... He knew absolutely nothing about the anti-nausea med I was asking about and was googling in front of me. SAVE YOURSELF. DO NOT GO TO THIS AWFUL DOCTOR.
What went well
No results
What could be improved
  • I didn't feel respected
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Appointment was rushed
  • Didn't trust the provider's decisions
2 others found this helpful
Helpful
Mar 12, 2024
Hi, thank you for bringing this to our attention.... Read More
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great experience
saw Dr Koo in consultation for routine colonoscopy and for cancer concerns. Was very understanding and kind. Thoroughly reviewed by concerns. Outstanding experience during my colonoscopy. Very skilled. Would strongly recommend
What went well
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Sep 05, 2023
Hello Customer, thank you for your kind review!... Read More
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wonderful physician
have been seeing dr koo for many years. outstanding and caring physician. I routinely recommend him to all my friends who need a GI doctor
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Staff friendliness
What could be improved
No results
Helpful
May – Jun 29, 2023
Hello May, thank you for your kind review! We... Read More
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Great doctor!
I have been seeing Dr. Koo for several years now as my gastroenterologist. He is always patient, thorough and extremely knowledgeable. I trust his guidance and we always come up with a logical and effective game plan regarding any of my health issues!
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
RK – Dec 02, 2022
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great experience
I have consistent great experiences w Dr Koo. He has taken care of my routine needs (colonoscopies etc) - and more recently helped w an acute problem. Always very caring and provides fantastic care
What went well
  • Explained conditions well
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
1 other person found this helpful
Helpful
Miller – Nov 08, 2022
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High quality medical care
Informative, thorough, proactive. Excellent overall. Highly recommended.
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Wait times
What could be improved
No results
Helpful
Tetsu Funabashi – Oct 25, 2022
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has been my doctor for years
have been seeing him for my care for >9y. Always outstanding. Very caring and compassionate
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Jane – Sep 15, 2022
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really fantastic doctor.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Sue – Jun 22, 2022
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family doctor
our whole family sees dr koo from my grandparents to my daughter. We would never trust our health with anyone else - he is such a phenomenal doctor.
What went well
  • Listened & answered questions
  • Explained conditions well
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Ginny – May 10, 2022
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excellent doctor
Has been my doctor for many years. See him for my routine screenings but also for my chronic problems. Very intelligent and kind. Consistently great experience.
What went well
  • Listened & answered questions
  • Explained conditions well
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Robert – May 06, 2022
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great doctor
has been my doctor for years. always a great experience. has a very calming quality; very caring and thoughtful. always punctual.
What went well
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Niki (Mahwah) – Apr 06, 2022
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Awesome GI doctor!!
Dr Koo listened to my GI complains then address each circumstances precisely in a way that I felt comforted and fine. I was very happy that I had this meeting with Dr. Koo.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
Freddie – Apr 01, 2022
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colon screening
had my colonoscopy with dr koo; very professional, very skilled. would see him again for any future GI problems
What went well
  • Office environment
  • Listened & answered questions
  • Explained conditions well
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
Helpful
mary (Lodi) – Mar 26, 2022
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good experience
saw dr koo on recommendation from a friend - really great experience. He was very kind. Definitely knows what he is doing. Am a pt for life.
What went well
  • Listened & answered questions
  • Explained conditions well
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Jenny (Closter) – Mar 23, 2022
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very thoughtful
have been dr koo's pt for years - he is very thoughtful and caring. Very skilled. Would recommend him highly
What went well
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Elise (Closter) – Mar 11, 2022
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great doc
great doc; very insightful and thoughtful
What went well
No results
What could be improved
No results
Helpful
Ron – Mar 10, 2022
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great doc
great visit - has been my doctor for years; highly recommend
What went well
No results
What could be improved
No results
Helpful
Jenny – Mar 09, 2022
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Leave a review

How was your experience with Dr. Koo?

Know Before You Go

About Me

care philosophy

Andy Koo, MD specializes in all aspects of gastrointestinal conditions and has special interests in the management of inflammatory bowel disease and therapeutic endoscopy. Dr Koo is also trained in biliary endoscopy, capsule endoscopy, and endosonography....read more

biography

Andy Koo, M.D. specializes in all aspects of gastrointestinal conditions and has special interests in the management of inflammatory bowel disease and therapeutic endoscopy. Dr. Koo is also trained in biliary endoscopy, capsule endoscopy, and endosonography....read more

  • Gastroenterology

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

  • Mount Sinai Hospital

    Fellowship Hospital, 2007

  • The Mount Sinai Hospital

    Fellowship Hospital, 2007

  • New York University Grossman School Of Medicine

    Residency Hospital, 2004

  • The University Of Chicago

    Undergraduate School, 1995
American Board of Medical Specialties®
American Board of Internal Medicine®
- 
Gastroenterology
For detailed information about any of the below board actions, please search for the provider's records on the linked state licensing board or the Federation of State Medical Boards. To learn more about the difference between these sources, please refer to our FAQs.
Healthgrades has not received any data indicating a board action exists for this provider.

Healthgrades receives board action history for physicians and physician assistants. The information displayed here is sourced from independent information providers, such as state board websites, and may not be the most up-to-date information. Healthgrades makes no representations with respect to the accuracy of any information provided here and assumes no responsibility or liability for such information.

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Dr. Koo is a Healthgrades Choice provider in Gastroenterology

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    Locations

    Bergen Medical Associates

    Bergen Medical Associates466 Old Hook Rd Ste 1 Emerson, NJ 07630
    1
    • Call
    • Fax
    • Hours
      • Mon: 8:00am - 4:00pm
      • Tue: 8:00am - 4:00pm
      • Wed: 10:30am - 6:30pm
      • Thu: 8:00am - 4:00pm
      • Fri: 8:00am - 4:00pm
    • Directions
    (201) 967-8221
    Bergen Medical Associates1 W Ridgewood Ave Ste 301 Paramus, NJ 07652
    2
    • Call
    • Fax
    • Hours
      • Mon: 8:30am - 5:30pm
      • Tue: 8:30am - 5:30pm
      • Wed: 8:30am - 5:30pm
      • Thu: 8:30am - 5:30pm
      • Fri: 8:30am - 5:30pm
    • Directions
    (201) 445-1660
    Bergen Medical Associates305 W Grand Ave Montvale, NJ 07645
    3
    (201) 391-0071
    Bergen Medical Associates269 Livingston St Northvale, NJ 07647
    4
    • Call
    • Fax
    • Hours
      • Mon: 9:00am - 4:45pm
      • Tue: 9:00am - 7:15pm
      • Wed: 9:00am - 4:30pm
      • Thu: 8:00am - 4:45pm
    • Directions
    (201) 767-8400
    See all Gastroenterologists in Emerson, NJ