Dr. John Zeroogian, MD | Pasadena, CA | Gastroenterologist

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Dr. John Zeroogian treats colon polyps, GERD, and acid reflux, and performs colonoscopy, lower GI endoscopy, and upper GI endoscopy. He has practiced gastroenterology for 37 years and is affiliated with Mercy Medical Center.

Dr. Zeroogian earned his medical degree from the University of Pittsburgh School of Medicine and sees patients in Pasadena, California. Patients on Vitals rate Dr. Zeroogian 4.48 out of 5.

Overview based on verified provider data

accepting new patients
4.5

25 Ratings
37 years of experience
speaks English
University Of Pittsburgh School Of Medicine
12 written reviews
1 specialty
10 areas of expertise
1 hospital affiliation
1 office location

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me

Based on patient feedback. Read the reviews

Dr. Zeroogian's Ratings and Reviews

4.5

25 Ratings with 12 written Reviews

Average Wait Time 12 Minutes

How was your appointment with
Dr. Zeroogian?

Patients’ Perspective

Gave an accurate diagnosis: (15) Did WellNeeds Improvement (2)
Had a good bedside manner: (14) Did WellNeeds Improvement (1)
Spent time with me: (15) Did WellNeeds Improvement (1)
Provided follow-up after the visit: (11) Did WellNeeds Improvement (1)
Flexible scheduling: (12) Did WellNeeds Improvement (1)
Saw me in a timely manner: (1) Did WellNeeds Improvement (0)
Staff was courteous: (1) Did WellNeeds Improvement (0)

25 ratings & reviews

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Showing 1 to 10 of 12 reviews

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Dr. Z was excellent as always. The staff and Endoscopy Center were great from check in to through procedure.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling
Saw me in a timely manner
Staff was courteous

Needs Improvement

September 11th, 2026

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My visit to Dr. Zeroogian Wass for reassurance with my medical condition. All my questions and concerns were addressed and I left the office feeling good because I knew I was receiving excellent care and I knew whatever future results were, I was in excellent hands with Dr. Zeroogian and his expertise.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Flexible scheduling

Needs Improvement

September 16th, 2025

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The doctor is very patient and Listens to your concerns and your needs also ask plenty of questions and follows up with excellent recommendations on care Or any procedures needed

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling

Needs Improvement

May 28th, 2024

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Dr Zeroogian was great. Very understanding and supportive to my mother.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling

Needs Improvement

May 28th, 2024

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Very friendly doctor, easy to talk to. Dr is very straight forward.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me

Needs Improvement

January 5th, 2024

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A very nice Dr. that was very professional and courteous. Highly recommended.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me

Needs Improvement

December 18th, 2023

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My visit with Dr. Z was efficient and he addressed my concerns thoroughly. I have two more additional treatments with him. I would definitely recommend to others.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit

Needs Improvement

November 10th, 2023

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The doctor made me feel very comfortable discussing this rather unpleasant topic

Did Well

Gave an accurate diagnosis
Spent time with me
Flexible scheduling

Needs Improvement

May 15th, 2019

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After seeing 2 other gastroenterologists, Dr Z was able to diagnose my problem after 1 visit, and my quality of life has never been better.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling

Needs Improvement

January 13th, 2019

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First experience no issues. Second time (5 years ago) nightmare. I was not anesthetized properly and woke up in a LOT of pain during procedure. I called nurse over who felt my hardened stomach. I told doctor Z he needed to stop due to pain nut he continued. He and anesthesiologist knew meds I was on. Dr. Z said he wasn't aware and next time he would use another option. There won't be any next time with this doctor!!!! 15 mins.I would NOT recommend him to anyone due to my very painful experience.

Did Well

Needs Improvement

Gave an accurate diagnosis

November 2nd, 2017

Unio Specialty Care - Gastroenterology

50 Bellefontaine St Ste 308Pasadena, CA 91105

Tel: (626) 659-5414


Dr. John Zeroogian, MD	Theresa Obonyano, APRN	Bhavana Akotia, PA-C	Ashley Anderson, APRN
Gastroenterology	Gastroenterology	Gastroenterology	Gastroenterology
Accepts New Patients	Accepts New Patients	Accepts New Patients	Accepts New Patients
4.5 (25 Ratings)	0 (0 Ratings)	0 (0 Ratings)	0 (0 Ratings)
37 Years of Experience
No Virtual Visit Option	Virtual Visit Available	Virtual Visit Available	Virtual Visit Available
Speaks English	Speaks English	Speaks English	Speaks English
Pasadena , CA	Sacramento , CA	Tempe , AZ	Sacramento , CA
Med School: University Of Pittsburgh School Of Medicine	Med School: The University of Texas Health Science Center at Houston	Med School: Charles R Drew University	Med School: East Tennessee State University - Quillen College of Medicine
Current Profile	View Profile	View Profile	View Profile

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Gastroenterology

Abdominal Pain
Acid Reflux Disease (Gastroesophageal Reflux / GERD)
Acid Reflux Disease (GERD)
Celiac Disease
Colonoscopy
Constipation
Hemorrhoids
Hepatitis C
Irritable Bowel Syndrome (IBS)
Ulcerative Colitis

Dr. John Zeroogian holds an active medical license in the state of California.

Medical License

Medical Doctor with an active medical license in the state of California that expires in 2027.

Education & Training

Medical School

Graduated from University Of Pittsburgh School Of Medicine in 1989.

NPI Number

Dr. Zeroogian's NPI number is 1437149226.

Jane Lee
Nurse Practitioner
| Mission Hills, CA
(0)
Irene Austria-Ramos
Nurse Practitioner
| Los Angeles, CA
(1)
Coka Kiu Yip
Nurse Practitioner
| West Hollywood, CA
(0)
Roberto Alonso
Nurse Practitioner
| Baldwin Park, CA
(0)
Dr. Suisun Simon Chan, MD
Gastroenterology
42 Years Exp | Rowland Heights, CA
(1)
Dr. Leon L Chen, MD
Gastroenterology
18 Years Exp | Torrance, CA
(0)
Elizabeth A Herbst-Collins
Gastroenterology
29 Years Exp | Long Beach, CA
(0)
Dr. Mingquan Bussarakum, MD
Internal Medicine
55 Years Exp | Los Angeles, CA
(0)
Ashley Gianoulis Gill
Nurse Practitioner
| West Hollywood, CA
(0)
Janet M Shaffron
Nurse Practitioner
| Whittier, CA
(0)

How can I make an appointment with Dr. John Zeroogian?: You can find contact information for Dr. John Zeroogian here on Vitals.
What languages does Dr. John Zeroogian speak?: Dr. John Zeroogian speaks English.
Does Dr. John Zeroogian accept virtual/telehealth appointments?: Dr. John Zeroogian has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Where is Dr. John Zeroogian's office located?: Dr. John Zeroogian's office is located at 50 Bellefontaine St Ste 308, Pasadena, CA, 91105.
Which hospitals is Dr. John Zeroogian affiliated with?: Dr. John Zeroogian is affiliated with Mercy Medical Center.

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