What is the emergency room wait time at Mountainside Hospital?

Patients spend a median of 229 minutes (3 hours 49 minutes) in the emergency department at Mountainside Hospital, according to CMS. This is a median over a past 12-month reporting period, not a live figure.

Does Mountainside Hospital have an emergency room?

Mountainside Hospital provides emergency services.

What is the CMS star rating for Mountainside Hospital?

Mountainside Hospital has an overall rating of 4 out of 5 stars from the Centers for Medicare and Medicaid Services.

Where is Mountainside Hospital located?

Mountainside Hospital is at Highland Ave &Amp; Bay St, Glen Ridge, NJ 7028.

What is the phone number for Mountainside Hospital?

The phone number for Mountainside Hospital is (973) 429-6100.

Mountainside Hospital

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(973) 429-6100 Visit Website

Acute Care Hospitals

Time ZoneEST
CountyEssex
Emergency CapableYes
FIPS34013
Area Code973

Quality and performance

Centers for Medicare & Medicaid Services · data as of July 2026

Patients spend an average of 3 hours 49 minutes in the emergency department at Mountainside Hospital. That is 42 minutes longer than the New Jersey average of 3 hours 7 minutes.

CMS rating ★★★★★ 4/5

Left before seen 2%

ER volume high

Type Acute Care

Ownership For-profit

Maternity Birthing-friendly

Source: CMS Hospital General Information and Timely & Effective Care. Wait times are a median over a past 12-month reporting period, not live data. Not affiliated with CMS or with Mountainside Hospital. For a medical emergency, call 911.

The information listed on this page will help you determine if Mountainside Hospital is the nearest hospital to your location. Address, phone number, emergency department status, bed count and CMS quality measures for Mountainside Hospital are listed above.