Tax-exempt organization ยท Files a Form 5500
MOUNT AUBURN HOSPITAL
CO BILH TAX 529 MAIN ST 4TH FL, CHARLESTOWN, MA 02129-0000
EIN
04-2103606
Tax-exempt status
501(c)(3) charitable, religious, educational
IRS · 2026-09
Deductibility
Contributions are deductible
IRS · 2026-09
Foundation classification
Hospital or medical research organization
IRS · 2026-09
IRS ruling date
1936-11
IRS · 2026-09
NTEE code
E220
IRS · 2026-09
Latest tax period on file
2025-09
IRS · 2026-09
Revenue (latest 990)
$397,380,629
IRS · 2026-09
Assets (latest 990)
$450,354,549
IRS · 2026-09
Benefit plan 2, 2024 filing
THE RETIREMENTPLUS RETIREMENT PLAN FOR EMPLOYEES OF MOUNT AUBURN HOSPITAL
DOL · 2025-10-15
Participants (start of year)
4,270
DOL · 2025-10-15
Plan features
code 2A2F2G2L2M2T3H
DOL · 2025-10-15
Plan type
Single-employer plan
DOL · 2025-10-15
Business code (NAICS)
622000
DOL · 2025-10-15
Benefit plan 2, 2023 filing
THE RETIREMENTPLUS RETIREMENT PLAN FOR EMPLOYEES OF MOUNT AUBURN
DOL · 2025-07-15