Elizabeth John, M.D.

Gastroenterology • Elizabeth, NJ • 3+ locations (Gastroenterology at Mountainside Medical Group in Montville and Glen Ridge) locations

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About

Elizabeth John, M.D. is a gastroenterologist and internal medicine physician practicing at Mountainside Medical Group locations in Montville and Glen Ridge, New Jersey. Dr. John completed her medical degree from University of Central Florida College of Medicine, her internal medicine residency at Rutgers Robert Wood Johnson Medical School, and her gastroenterology fellowship at Methodist Dallas Medical Center in Texas. She speaks English, Malayalam, and Spanish.

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Clinic Type

Gastroenterology

Address

Mountainside Medical Group – Gastroenterology, 170 Changebridge Rd. Unit C4 Montville, NJ 07045; Mountainside Medical Group – Gastroenterology, 311 Bay Ave. Suite 300B Glen Ridge, NJ 07028

Phone

(973) 884-3355

Email

ardentcustomerservice@ensemblehp.com

Opening Hours

Not published — contact the clinic to confirm hours.

Website

https://mountainsidemedicalcenter.com/find-a-provider/provider/1346794815/

Services Offered

Gastroenterology
Internal Medicine
Gastroenterology (GI)
Internal Medicine (IM)
Gastroenterology, Internal Medicine

Insurance & Payment

—

Languages Spoken

English
Malayalam
Spanish

FAQs

What are the physician’s specialties?

Gastroenterology, Internal Medicine

What languages does the physician speak?

English, Malayalam, Spanish

Awards & Accreditations

American College of Gastroenterology awards and distinctions
American Gastroenterological Association awards
Digestive Diseases Week awards/distinctions

Social Media

Twitter Youtube Facebook Linkedin Instagram

Photos

What Patients Say

Overall sentiment across review platforms: positive

Mountainside Medical Center official site: 4.9/5 (216 reviews)
WebMD: 5.0/5 (2 reviews)
Birdeye: 4.8/5 (38 reviews)
U.S. News & World Report: 4.3/5 (6 reviews)

Patients praise

kind and professional staff
thorough and clear explanations
good listening skills
compassionate approach
easy and low-stress experience

Common complaints

occasional negative patient experience mentioned in aggregate reviews

"Love Dr Elizabeth John!!!"

— WebMD

"Had an excellent experience with Dr. John. From the moment I walked into the clinic, I was treated with kindness and professionalism. Dr. John took the time to listen to my concerns, explained everything clearly, and made sure I was comfortable throughout the appointment."

— Birdeye

"Dr. Elizabeth John is one of the best drs I’ve ever seen! Office staff and hospital staff during procedure were outstanding - cannot say enough positive things about her, her office staff and Mountainside Hospital team members"

— Birdeye

Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].