What patients are saying
Overall rating
4.60
Average wait time
3.64
Bedside manner
4.68
“Dr Lo's staff fit me into a very busy day. They were pleasant and organized. I was placed in an examining room upon the completion of my medical history. Within 7-10 minutes Dr Lo came in. The discussion and examination was thorough and came to a diagnosis that was completely explained to me. My overall visit was very professional throughout.”
Paul M.August 28, 2026
“There were too many patients in a limited waiting room space.
Some of elderlies wear masks and coughed often.
Examination room was quite nice and roomy.”
RHLess than 6 months ago
About Dr. Sunny Lo
Dr. Sunny Lo is board-certified and fellowship-trained in gastroenterology and hepatology. He is a member of the American College of Gastroenterology and has trained extensively in endoscopy, colonoscopy, and endoscopic retrograde cholangiopancreatography (ERCP) procedures. His medical interests range from treating patients with esophageal disorders, reflux disease, weight loss, inflammatory bowel disease (IBD), irritable bowel syndrome (IBS), hepatobiliary disease, and pancreatic disorders.
Dr. Lo received his undergraduate degree in Biological Sciences from the University of California, Irvine and his medical degree at Western University of Health Sciences in Pomona, California. He completed his residency in Internal Medicine at Loma Linda University Medical Center and his fellowship in Gastroenterology fellowship at UC Health Parkview Medical Center in Colorado.
Dr. Lo is committed to providing the best patient care. In his spare time, he enjoys spending time with his family, playing basketball, and being outdoors. In addition to English, he is fluent in Mandarin.
Is this doctor in your insurance network?
Enter your insurance carrier and plan
choose insurance
In-network insurances
99% of patients have successfully booked with these insurances
Aetna
BlueCross BlueShield
Cigna
UnitedHealthcare
Areas of expertise
This doctor's experience enhances their expertise in similar cases. Below are the conditions or surgeries they treat most frequently.
Acute stomach inflammation/infection
Colonoscopy
Acute gastrointestinal bleeding
Acute hemorrhoids
Upper GI endoscopy
Acute stomach inflammation/infection
Colonoscopy
Acute gastrointestinal bleeding
Acute hemorrhoids
Office location
Education and background
Practice names
Education and training
- Medical School - Western University of Health Sciences, Doctor of Osteopathic Medicine
- Loma Linda University Medical Center, Residency in Internal Medicine
- UCHealth Parkview Medical Center, Fellowship in Gastroenterology
Professional memberships
- American College of Gastroenterology
Languages spoken
- English
- Chinese (Mandarin)
Provider's gender
Male
NPI number
1891053187
Patient reviews
All reviews have been submitted by patients after interacting with the practice.
Overall rating
4.60
Wait time
3.64
Bedside manner
4.68
Your trust is our top concern, so providers can't pay to alter or remove reviews. We also don't publish reviews that contain any private patient health information. Learn more here
30 reviews
Most relevant
I like how he takes time and explains everything to you exactly what’s gonna happen and what to expect.
Less than 6 months agoRP
Very easy and quick when booking on internet. The office was crowed but it went quick
November 3, 2026Victor M.Verified patient
Professional and knowledgeable doctor. Great bedside manner and nice staff.
Less than 6 months agoKatrena H.Verified patient
Excellent, super smart, super kind doc with fantastic staff.
July 3, 2026Penelope P.Verified patient
Dr. Lo was great
September 30, 2026C Rudy H.Verified patient
Dr Lo's staff fit me into a very busy day. They were pleasant and organized. I was placed in an examining room upon the completion of my medical history. Within 7-10 minutes Dr Lo came in. The discussion and examination was thorough and came to a diagnosis that was completely explained to me. My overall visit was very professional throughout.
August 28, 2026Paul M.Verified patient
Extremely disappointed with this office. I submitted my insurance information well in advance of my appointment. No one ever called to tell me there was any issue with my insurance — yet they later claimed they “couldn’t reach me,” which makes no sense because they called me just the day before to confirm my appointment.
On top of that, the office was running late for every single patient that day. I waited over an hour past my appointment time, and I wasn’t the only one — other patients in the waiting room had been sitting there for over an hour as well. After all that waiting, they finally told me my insurance wasn’t covered and I couldn’t be seen.
If they had verified my insurance beforehand (as they should have), or actually called me about the issue, I wouldn’t have wasted an entire morning. Chronic overbooking, poor communication, and zero respect for patients’ time.
August 14, 2026Shiya W.Verified patient
No parking... After going back and forth around the parking lot, I ended up parking outside of complex and walk.
There was a long line when I arrived, and they didn't handle it very well... Two assistants checking in through one small window.
There was a long wait, waiting room was small and unpleasant, and no bathroom on the whole floor.
However, staff was friendly and Dr. Lo was fine, though what c remains to be seen is how he is on procedure day.
August 5, 2026Initials hidden
There were too many patients in a limited waiting room space.
Some of elderlies wear masks and coughed often.
Examination room was quite nice and roomy.
Less than 6 months agoRH
Dr. Lo is an excellent doctor. He listened to my problems carefully and attentively. The, he gave me suggestions ad invaluable advice regarding my problems. Dr. Lo certainly is the best doctor who extremly cares about patient's health.
Less than 6 months agoKW
great job
Less than 6 months agoHB
Welcoming atmosphere since the arrival until the end of the procedure. I felt everyone treated me with dignity and respect during the treatment. Thank you for having outstanding practice and professionalism.
Less than 6 months agoPC
I was in for my first ever colonoscopy. I was Drs 14 of the day. Intake was very good with staff and nurses at the Outpatient Clinic. Dr Los was very professional and good with the surgical staff. Procedure was sometimes uncomfortable but then I’d pass air and it was fine. He removed one polip but more cleanup under anesthesia in 6 months is necessary. A great professional experience.
Roger out
Less than 6 months agoRL
Quickly and sharply
Less than 6 months agoCT
It is definitely one to look at if you need a gastrointestinal doctor. Easy to make an appointment, but the wait room is a bit cramped and takes awhile to get in and see the doctor. But after the initial process, everything only gets better. Staff seems patient and knowledgeable. Doctor is enthusiastic and will actually talk to you as a person not just a subject of interest. I would definitely go back.
Less than 6 months agoDM
Very professional, friendly, and knowledgeable.
Less than 6 months agoAV
Less than 1 month agoInitials hidden
Less than 1 month agoInitials hidden
Less than 3 months agoInitials hidden
Less than 3 months agoInitials hidden
September 29, 2026Kimberly G.Verified patient
Less than 3 months agoInitials hidden
Less than 3 months agoInitials hidden
Less than 3 months agoInitials hidden
Less than 6 months agoInitials hidden
Less than 6 months agoInitials hidden
Less than 6 months agoInitials hidden
July 2, 2026Stephanie G.Verified patient
Less than 6 months agoKF
June 2, 2026Karlo P.Verified patient
How soon can I make an appointment with Dr. Sunny Lo?
Generally, Dr. Sunny Lo has appointments available on Zocdoc within 1 week. You can see Dr. Lo's earliest availability on Zocdoc and make an appointment online.
Is Dr. Sunny Lo accepting new patients?
Dr. Sunny Lo generally accepts new patients on Zocdoc. You can see Dr. Lo's earliest availability on Zocdoc and schedule an appointment online.
Does Dr. Sunny Lo accept my insurance?
Choose your insurance plan to verify if Dr. Lo is in-network.
Can I make an appointment with Dr. Sunny Lo online?
Yes, you can make an appointment online with Dr. Lo using Zocdoc. It’s simple, secure, and free.
What practice does Dr. Sunny Lo work with?
Dr. Sunny Lo works with SoCal Digestive Wellness.
Where is Dr. Sunny Lo's office located?
Dr. Sunny Lo's office is located at 612 W Duarte Rd, Arcadia, CA 91007.
What are common reasons for patients to see Dr. Sunny Lo?
Dr. Sunny Lo frequently sees patients for Abdominal Pain, Colonoscopy, Gastroenterology Consultation, Hemorrhoids, and Weight Loss Consultation. You can see other visit reasons for Dr. Sunny Lo on their profile.
What languages does Dr. Sunny Lo speak?
Dr. Sunny Lo speaks English and Chinese (Mandarin).
How do patients rate Dr. Sunny Lo in reviews?
30 patients have reviewed Dr. Sunny Lo. The overall rating for this doctor is 4.6/5. They have a 4.68/5 rating for bedside manner and a 3.64/5 rating for wait time. You can read individual reviews and ratings on their profile.