Data update history
May 22, 2024
Updated personnel
Identified 4 new personnel
November 25, 2023
Posted financials
Added Form 990 for fiscal year 2021
June 18, 2023
Posted financials
Added Form 990 for fiscal year 2022
April 27, 2023
Updated personnel
Identified 1 new personnel
March 1, 2022
Updated personnel
Identified 5 new personnel
Nonprofit Types
Mental health organizationsHousing and shelter organizationsHeadquarter / parent organizationsCharities
Issues
HealthMental health
Characteristics
Tax deductible donations
General information
- Address
- 29 Crafts St 260
- Newton, MA 02458
- Metro area
- Boston-Cambridge-Newton, MA-NH
- County
- Middlesex County, MA
- Website URL
- mainstayliving.org/Â
- Phone
- (617) 789-4500
IRS details
- EIN
- 04-3490827
- Fiscal year end
- June
- Taxreturn type
- Form 990
- Year formed
- 1999
- Eligible to receive tax-deductible contributions (Pub 78)
- Yes
Categorization
- NTEE code, primary
- F33: Group Home, Residential Treatment Facility-Mental Health Related
- NAICS code, primary
- 62422: Community Housing Services
- Parent/child status
- Central organization
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