Hospital · Short-term acute hospital
Who owns Mount Sinai South Nassau?
One Healthy Way · Oceanside, NY · 11572
Overview
Mount Sinai South Nassau is a short-term acute hospital in Oceanside, New York, operated by South Nassau Communities Hospital.
Ownership
Mount Sinai South Nassau is operated by South Nassau Communities Hospital, part of Mount Sinai Health System.
- Operator
- South Nassau Communities Hospital
- Owner group
- Mount Sinai Health System
- Ownership type
- Private Nonprofit
- Sources
Ownership history
Every dated change of operator and owner for Mount Sinai South Nassau, with the source for each.
Full ownership tree of Mount Sinai Health System
Every entity between this facility and its ultimate owner, with ownership percentages and dates.
Finances
From the hospital's Medicare cost report, fiscal year ending 2024.
| Net patient revenue | $663.0M |
| Operating expenses | $798.4M |
| Net income | $22.8M |
| Net income as a share of net patient revenue | 3.4% |
| Uncompensated care cost | $4.8M |
| Charity care cost | $2.2M |
| Medicaid net revenue | $80.5M |
| Medicare disproportionate share percentage | 13.0% |
Payer mix by inpatient days (2024)
- Commercial and other 57.3%
- Medicare 38.1%
- Medicaid 4.5%
Services
Top inpatient services, Medicare (2024)
| Service | Discharges | Average total payment |
|---|---|---|
| Septicemia or severe sepsis without MV >96 hours with MCC · 871 | 1,110 | $21K |
| Heart failure and shock with MCC · 291 | 253 | $13K |
| Respiratory infections and inflammations with MCC · 177 | 177 | $17K |
| Septicemia or severe sepsis without MV >96 hours without MCC · 872 | 167 | $11K |
| Infectious and parasitic diseases with o.r. procedures with MCC · 853 | 141 | $52K |
Top outpatient services, Medicare (2024)
| Service | Services |
|---|---|
| Comprehensive Observation Services · 8011 | 1,130 |
| Level 2 Excision/ Biopsy/ Incision and Drainage · 5072 | 229 |
| Level 3 Endovascular Procedures · 5193 | 221 |
| Level 1 Endovascular Procedures · 5191 | 215 |
| Level 2 Upper GI Procedures · 5302 | 178 |
Medicare fee-for-service only. Small counts are suppressed by CMS.
Location and market
- Address
- One Healthy Way · Oceanside, NY · 11572
- State
- New York
10 off-site locations
Campuses, off-site emergency departments and outpatient departments under this hospital's certification.
Sources and identifiers
- Operator: CMS Hospital Enrollments and All Owners (PECOS): hospital ownership graph · AHRQ Compendium of U.S. Health Systems (hospital linkage) · Company website
- Finances and payer mix: CMS hospital cost reports (HCRIS), fiscal year 2024
- Services: CMS Medicare inpatient and outpatient utilization
- Ownership type and beds: CMS Provider of Services file
- Location: CMS and Census Bureau geography
- CMS certification number
- 330198
- NPI
- 1922079094
- Last confirmed
- 2026-10-23
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