Long Island Gastroenterology Specialists
Long Island Gastroenterology Specialists is a Gastroenterologist practice in Wantagh, NY. Rated 4.6 from 175 public reviews. Phone and website are listed.

Address
1488 Wantagh Ave, Wantagh, NY 11793
Wantagh, NY 11793
Phone
(516) 785-6800Website
Visit listed websiteListing updates
Request a correction or opt-outListed hours
- Monday
- 8:30AM–5PM
- Tuesday
- 8:30AM–5PM
- Wednesday
- 8:30AM–5PM
- Thursday
- 8:30AM–5PM
- Friday
- 8:30AM–4:30PM
- Saturday
- Closed
- Sunday
- Closed
Credentials, affiliations, and coverage
Sources
- google-maps-octoparse · checked Aug 30, 2026
Federal data is attributed to its source and does not imply CMS endorsement.
Newest photos

Newest reviews
Gonzalo Farina
Great experience every time. The doctor is really good and always on top of everything. The staff is friendly, helpful, and easy to work with. Definitely recommend this office.
Henny
DO NOT GO ALMOST KILLED MY FATHER BY RUPTURING HIS COLON DURING A COLONOSCOPY
MC
The staff behind the counter is amazing and they do their best but the doctor I saw, had no compassion at all and I felt like I was in an assembly line and more interested in the money than me.
Karl Merting Jr.
Office staff are great!!! Dr. are even better don't look any further great Practice. Wish there were more stars to give them ...
Dominic Lacovara
Best Gastroenterologist Dr.Barth and Dr. Razzano are knowledgeable and have a great rapport with their patients
Connor O'Neill
There’s nobody I trust more with my health than this team of doctors. Because of their expert care and caution I avoided what could have been something serious. I’m very thankful to have been in their care.
Linda Cofini
I'm so pleased that I found this Gastroenterology practice! From the clearly knowledgeable, competent, and extremely thorough care by Dr. Razzano, to the Nurse(s), Phlebotomist, Office Staff - and particularly those at the Endoscopy Center (1488 Wantagh Ave) - it's medicine and patient care the way it should be; and, very much like the "old days". Trusting that your health provider is working in your best interest always is key - this is something that sadly, is sorely lacking in other practices. I've had significant gastrointestinal issues over the years that have progressed a bit with age - and along the way, I've visited multiple doctors/practices. This is probably the first time I feel confident that I'll be cared for without fail. Thank you LI Gastro!
Angelina Sissons
I had my very first colonoscopy this week and Dr Razzano and his entire staff were extremely patient and caring with me when I was anxious for my first time going under anesthesia. I would recommend this place to anyone seeking help with gastrointestinal issues.
Talia Comens
The office staff is incredibly friendly and attentive. At one of their locations, they even have someone assisting with traffic to ensure safe entry into the parking lot. On a rainy day, he went the extra mile and offered me an umbrella to walk from the lot to the office. It’s clear this practice truly cares about their patients and puts a lot of thought into their staffing. Dr. Carly Barth is absolutely amazing—attentive, proactive, and personable. She takes concerns seriously and goes above and beyond to ensure thorough and timely care. I’m so grateful to have found her and highly recommend this practice!
Stacie Buchalter
I honestly don't understand how this practice has so many positive reviews. Staff is incompetent and a person could be in severe pain for over 3 weeks and NO ONE RETURNS YOUR MESSAGES! Stay Away!!!!! Thank goodness for other more caring gastro doctors.


