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Santa Monica Digestive Diseases & Gastroenterology

Gastroenterology • Santa Monica, CA

About

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Clinic Type

Gastroenterology

Address

1223 15th St., Suite 310, Santa Monica, CA

Phone

310-582-6240

Email

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Opening Hours

8:00 am - 5:00 pm

Website

https://www.uclahealth.org/locations/santa-monica-digestive-diseases

Services Offered

Gastroenterology
Gastrointestinal Nutrition
Gastroenterology Nutrition
Dietetics
Gastroenterology Psychology
Gastroenterology (G.I.)
Clinical trials
Minimally invasive treatments
Nutrition interventions
Integrative support

Technology & Equipment

Gastroenterology
G.I. Diagnostics

Team

Mercedes Avila, Nurse Practitioner — NP
Lynn S. Connolly, MD — MD
Vivy T. Cusumano, MD — MD
Mary Farid, DO — DO
Brian Horwich, MD, MS — MD
Sentia Iriana, MD, MS — MD
Tiffany Ju, PhD — PhD
Kate Mintz, MS, RDN — MS, RDN
Carl E. Nordstrom, MD — MD
Benjamin F. Nulsen, MD — MD
Mark Ovsiowitz, MD — MD
Kareem H. Sassi, MD — MD
Alireza Sedarat, MD — MD
F. Otis Stephen, MD — MD

Insurance & Payment

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Languages Spoken

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Current Offers

New patient special offers

FAQs

What services are offered at UCLA Health Digestive Diseases in Santa Monica?

Gastroenterology care, including minimally invasive treatments, nutrition interventions, GI psychology, and access to clinical trials.

Fill out this form to request an appointment with a specialist.

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Social Media

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What Patients Say

Overall sentiment across review platforms: positive

Healthgrades (Dr. Rahul Dixit): 4.9/5 stars (290 reviews)
WebMD (Dr. Kamyar Shahedi): 5.0/5 stars
Vitals (Dr. David Yamini): 4.5/5 stars (28 ratings/14 reviews)
Healthgrades (Digestive Health Associates-Santa Monica): 1.0/5 stars (1 rating)
UCLA Health (Dr. Vivy T. Cusumano): 4.7/5 stars (47 reviews)

Patients praise

physicians praised for knowledge, thoroughness, and professionalism
effective explanations of medical conditions and clear communication
convenient access to telehealth and same-day appointments reported by some patients
high overall ratings for individual providers across multiple platforms

Common complaints

concerns regarding office responsiveness and follow-up communication
reports of rushed appointments or perceived lack of warmth in bedside manner
complaints about unexpected out-of-network charges or billing issues
some patients feeling unheard or frustrated by difficulty reaching a diagnosis

"Doctor was very knowledgeable and efficient. He listened patiently and offered clear solutions."

— WebMD patient review for Dr. Kamyar Shahedi

"In short…David Yamini is incredibly unprofessional and unkind. He is a FRAUD who will try and push any procedure he can on you."

— Vitals patient review for Dr. David Yamini

"After being sick over the weekend and choosing not to visit the ER. I called my GI doctor at 7:00 am. I was extremely lucky to have been scheduled for a same day appointment."

— UCLA Health patient review for Dr. Vivy T. Cusumano

Synthesized from public review platforms as of Jul 10, 2026 — sources: [1][2][3][4].