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GLENDORA DIGESTIVE DISEASE INSTITUTE is a Medicare-certified ambulatory surgery center located in GLENDORA, CA, offering same-day outpatient surgical procedures. Google rating: 4.9 out of 5 from 1431 reviews.

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GLENDORA DIGESTIVE DISEASE INSTITUTE

glendora, CAMedicare Certified

Location & Directions

Address

1794 S. BARRANCA AVE.

GLENDORA, CA

Google MapsšŸ—ŗWaze
(626) 858-4600

Service Area

This provider serves patients in GLENDORA and surrounding areas in CA.

Contact this surgery center for service area details

Note on Service Area

This ambulatory surgery center serves patients in the surrounding area. Contact this surgery center directly to confirm service availability in your specific location.

Procedures Performed

Common outpatient procedures performed at this ambulatory surgery center, based on reported specialties.

Gastroenterology (GI Surgery)6
ColonoscopyA flexible camera examines the full length of the colon to screen for cancer and remove polyps before they become cancerous. Done under sedation, it typically takes 30 to 60 minutes. The bowel prep the day before is the part most patients find hardest.Upper Endoscopy (EGD)A thin camera passed through the mouth examines the esophagus, stomach, and the first part of the small intestine. Used to investigate persistent heartburn, difficulty swallowing, unexplained bleeding, or abdominal pain. Usually takes 15 to 30 minutes under sedation.Flexible SigmoidoscopyExamines the lower portion of the colon only, rather than its full length. Preparation is lighter than a full colonoscopy and sedation is sometimes unnecessary, but it cannot detect problems higher in the colon.Capsule EndoscopyYou swallow a vitamin-sized camera that photographs the small intestine as it passes through ā€” a region that standard scopes cannot easily reach. There is no sedation and no recovery. The capsule passes naturally, and images are reviewed after the fact.ERCPCombines endoscopy and X-ray imaging to diagnose and treat blockages in the bile and pancreatic ducts, most often gallstones stuck in a duct. Unlike a routine endoscopy, it carries a meaningful risk of pancreatitis afterward, so it is used when treatment is likely rather than for screening alone.Hemorrhoid TreatmentShrinks or removes swollen veins in the rectum and anus using rubber band ligation, injection, or surgical removal depending on severity. Banding is quick and typically requires no anesthesia; surgical removal is more effective for advanced cases but recovery is noticeably more uncomfortable.

Procedure list is based on CMS-reported specialty designations. Contact the facility to confirm specific procedures offered.

Browse all procedures by specialtyCommon questions about outpatient surgery

Patient Experience Scores

Overall: 96/100 (+3 vs natl avg 93)

Based on 309 surveys Ā· 31% response rate

OAS CAHPS scores are linear means (0ā€“100) from Medicare patient surveys. Higher is better. National averages shown for comparison.

Overall RatingPatients who gave the facility a high overall rating
96+3 vs national avg (93)
0ā†‘ natl avg100
Would RecommendPatients who would definitely recommend this facility
96+4 vs national avg (92)
0ā†‘ natl avg100
StaffPatients who rated staff care and professionalism highly
98+2 vs national avg (96)
0ā†‘ natl avg100
CommunicationPatients who felt staff communicated well about their care
95+1 vs national avg (94)
0ā†‘ natl avg100
Source: OAS CAHPS (Outpatient and Ambulatory Surgery CAHPS) Survey, Centers for Medicare & Medicaid Services. Scores are linear means on a 0ā€“100 scale.

Safety Metrics

Safe Surgery Checklist: 91.5% (natl avg ~97%)

Safe Surgery Checklist

% of surgical patients for whom a safe surgery checklist was used (ASC-9). Higher is better.

91.5%

natl avg ~97%

Hospital Transfer Rate

% of patients transferred to a hospital during or after their procedure (ASC-4). Lower is better.

0.10%

natl avg ~1.0%

Patient Fall Rate

% of patients who experienced a fall resulting in injury. Lower is better.

0.01%

natl avg ~0.1%

Patient Burn Rate

% of patients who experienced a burn during their procedure. Lower is better.

0.00%

natl avg ~0.03%

Wrong Site Surgery Rate

% of cases involving wrong-site, wrong-side, wrong-patient, or wrong-implant surgical events. Lower is better.

0.00%

natl avg ~0.01%

Source: CMS ASC Quality Reporting Program. Data reflects Medicare patient outcomes reported by the facility.

Preparing for Your Procedure

Guides covering what to expect before, during, and after outpatient surgery.

Colonoscopy Prep: What Actually Matters
The prep is the hard part ā€” here is how to get through it.
Pre-Op Preparation Checklist
What to do in the weeks before your procedure, from two weeks out to the morning of.
What to Expect on Surgery Day
Arrival, check-in, the procedure itself, and discharge.
Understanding Anesthesia at an ASC
Sedation types, who administers it, and how recovery differs.
How to Read CAHPS Patient Experience Scores
What the survey scores above actually measure.
How Medicare Covers Outpatient Surgery
What Medicare pays at a certified ASC and what you owe.
Browse all patient resources

Explore More Surgery Centers

Compare this facility with others nearby.

GLENDORA SURGERY CENTER
Glendora, CA
4.4(7)
VALLEY ENDOSCOPY CENTER
Tarzana, CAĀ· nearby
5.0(1376)
NATIONAL AMBULATORY SURGERY CENTER LLC
Los Gatos, CAĀ· nearby
5.0(1187)
CABRILLO SURGERY CENTER
San Diego, CAĀ· nearby
5.0(1033)
UCSD SURGICAL CENTER OF SAN DIEGO LLC
San Diego, CAĀ· nearby
5.0(1033)
Other surgery centers in Glendora, CABrowse all California surgery centers

Google Reviews

4.9
1431 reviews
Wilson Agupitan

Wilson Agupitan

I have an excellent experience in this facility. The staff are courteous and accommodating. Iā€™m really impressed the way they treated me. Thank you!!!

Verified Google review
Susana Ugalde

Susana Ugalde

I would like to sincerely thank Dr. Raphael Toutounjian, MD, for the excellent care I received. He was professional, kind, and took the time to make me feel comfortable and safe throughout the entire procedure. The nurses and all the staff were wonderful, attentive, and very caring. I truly felt supported from beginning to end. I especially appreciate the follow-up calls to check on how I was feeling after the procedure. That meant so much to me and shows how much they truly care about their patients. I am very grateful for the outstanding care I received. Thank you to Dr. Toutounjian and the entire team for their dedication and compassion.

Verified Google review
Michele Cole

Michele Cole

Everyone here was great. When there was a problem with my insurance the morning of my procedure Courtney took care of it right away so I could have it since I'd done my prep the night before. Everyone acted as if they loved their job . From start to finish the staff and doctors were kind and considerate.

Verified Google review
Alfonso Espinoza

Alfonso Espinoza

The doctor told me I need to get a colonoscopy I was a little bit nervous. I just want to see the whole process in glandora digestive disease institute was so incredibly accommodating and I appreciate the thoughtful and warm hearted service that was provided to me. I have nothing but nice things to say about everyone from the front counter to behind the scenes the doctor the anesthesiologist and everyone who even helped take me in a wheelchair to my vehicle. I work in a service industry and I know what good service feels like and this was exactly that, so I just want to say from the bottom of my heart thank you to everyone and have a wonderful 2026 Al Espinoza

Verified Google review
Vincent Lee

Vincent Lee

I want to say the place is very cozy, and the staffs and nurses and doctors are very friendly and kind. Especially, the front desk, Ausley was very kind of her to gather around my personal belongs inside the office while my car was parked overnight when my booked driver failed to pickup for the service of colonoscopy at the day before my colonoscopy. I praise Ausley having a good heart to treat a patient. Applaud her!

Verified Google review
See All Reviews on Google

Reviews from Google Places for GLENDORA DIGESTIVE DISEASE INSTITUTE. These are real experiences shared by patients.

Contact

Phone

(626) 858-4600

Website

www.glendoradigestive.com/

Years in Operation

22 years

Est. 2004

Ownership

For-Profit

Operating Rooms

4

Specialties

Gastroenterology
Medicare Certified

Verify quality data on the official CMS source:

View on Medicare.gov

Questions to Ask

  • ā€¢Does my insurance cover this procedure here?
  • ā€¢What is the surgeon's experience with this procedure?
  • ā€¢What is the facility's hospital transfer rate?
  • ā€¢What anesthesia options are available?
  • ā€¢What is the recovery process and follow-up care?
  • ā€¢Are there pre-op requirements (labs, fasting, etc.)?