Live
Read more

Clinic Type

Internal Medicine

Address

239 Claremont Ave, Suite A, Montclair, NJ 07042

Phone

973-338-4900

Email

ardentcustomerservice@ensemblehp.com

Opening Hours

Wednesday 8:00 AM – 5:00 PM; Thursday 8:00 AM – 5:00 PM; Friday 8:00 AM – 5:00 PM; (Hours shown in extracted text)

Emergency Care

Emergency care available

Services Offered

  • Primary Care
  • Internal Medicine
  • Internal Medicine clinic (Montclair)

Insurance & Payment

Languages Spoken

  • English

FAQs

What are the hours of operation?

Monday through Friday 8:00 AM – 5:00 PM.

What is the address for Mountainside Medical Group – Primary Care?

239 Claremont Ave., Suite A, Montclair, NJ 07042.

What is the phone number?

(973) 338-4900.

Photos

What Patients Say

Overall sentiment across review platforms: mixed

  • Hackensack Meridian Mountainside Medical Center Find a Provider portal: 4.7 to 5.0 stars (varies by provider) (Multiple individual provider ratings ranging from 39 to 936 reviews)
  • Birdeye (Internal Medicine): 4.7 stars (15 reviews)

Patients praise

  • High star ratings for individual providers on internal portals
  • Some experiences noted as quick and pleasant
  • Helpful and kind staff in some specific locations
  • Positive experiences reported with medical care and nursing staff in specific units

Common complaints

  • Long wait times for appointments and during office visits
  • Unprofessional or dismissive customer service/staff interactions
  • Difficulty with administrative processes such as check-ins and scheduling

"I have to tell never have I ever dealt with a receptionist who thought they were a physician... There should only be scheduling not discussion of whether the patient is correct or not. TERRIBLE!!!!!!!!"

Birdeye Review

"Waited months to get a new patient appointment. Took a half day at work and waited an hour to find out that the receptionist had not checked me in properly..."

Yelp Review

"The staff is helpful and kind. The office staff was good about making sure I was seen close to my actual appointment time..."

Yelp Review

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

Information sourced from the clinic's website as of July 11, 2026.

More internal medicine clinics in Montclair

Montclair, NJ·Internal Medicine

Allam Medical Group LLC is an internal medicine practice based in Montclair, NJ, offering preventive care, diagnostic imaging, and services for commercial vehicle drivers. The practice operates from two Montclair locations, employs 4 people, and features a small, specialist-heavy team. Key stats: monthly site visits around 1.4k with low bounce (0.3%), pages per visit ~2.3, and strong local presence (100% US traffic). Main contact: 973-746-0595. Official site: allammedicalgroup.com.

Verified
Montclair, NJ·Internal Medicine

Summary: - Summit Health is a privately held hospitals and health care provider with over 340 medical practice locations across New Jersey, New York, Connecticut, Pennsylvania, and Central Oregon, offering primary and specialty care, urgent care, and patient portal access. - Headquarters: New Providence, New Jersey. Part of a larger connected care network including CityMD, VillageMD, and Village Medical, serving millions of patients. - Key features: easy communication with doctors, supportive care, and a patient portal for convenient access to healthcare information. Note: The provided page does not contain specific details about a Montclair hub at 1 Seymour Street. If you need location-specific info for Montclair, please share the exact address or verify on Summit Health’s site or map listing.

VerifiedOnline booking

See all internal medicine clinics in Montclair

Comparing your options?

See other internal medicine clinics in Montclair, or search the full directory by insurance, ratings, and more.

More Internal Medicine Clinics