Data update history
August 8, 2024
Posted financials
Added Form 990 for fiscal year 2023
July 24, 2024
Updated personnel
Identified 3 new personnel
November 25, 2023
Posted financials
Added Form 990 for fiscal year 2021
June 17, 2023
Posted financials
Added Form 990 for fiscal year 2022
June 12, 2023
Used new vendors
Identified 1 new vendor, including
Nonprofit Types
Mutual assistance organizationsBusiness and community development organizations
Issues
HealthBusiness and industry
Characteristics
MembershipsState / local level
General information
- Address
- 1 Bay Ave Medical Staff Office
- Montclair, NJ 07042
- Metro area
- New York-Newark-Jersey City, NY-NJ-PA
- County
- Essex County, NJ
- Website URL
- mountainsidehosp.com/contactÂ
- Phone
- (973) 429-6275
IRS details
- EIN
- 22-3757824
- Fiscal year end
- December
- Taxreturn type
- Form 990
- Year formed
- 2001
- Eligible to receive tax-deductible contributions (Pub 78)
- No
Categorization
- NTEE code, primary
- S40: Business and Industry
- NAICS code, primary
- 525120: Health and Welfare Funds
- Parent/child status
- Independent
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