Quick answers
- Which hospitals does Michael Masseria work at?
- Medicare's official clinician data lists Michael Masseria at 3 hospitals: Long Island Community Hospital, Mount Sinai South Nassau and Ns/Lij HS Southside Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Michael Masseria see patients?
- Medicare's clinician data lists 5 practice locations, including Oceanside, NY, West Islip, NY and Bay Shore, NY. Call before your visit to confirm the address.
- What is Michael Masseria's specialty?
- Medicare lists Certified Registered Nurse Anesthetist (CRNA) as the primary specialty.
- Does Michael Masseria accept Medicare assignment?
- Yes. Medicare's clinician data says Michael Masseria accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Michael Masseria?
- (516) 632-3000, as listed in official Medicare / NPI Registry data.
- What is Michael Masseria's NPI number?
- 1811454051. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Michael Masseria works
Medicare's Facility Affiliation Data lists Michael Masseria at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Long Island Community HospitalPatchogue, NY · Acute Care Hospital · CCN 330141
- Mount Sinai South NassauOceanside, NY · Acute Care Hospital · CCN 330198
- Ns/Lij HS Southside HospitalBay Shore, NY · Acute Care Hospital · CCN 330043
Practice locations
Addresses where Michael Masseria is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Healthy WayOceanside, NY 11572 (516) 632‑3000
- 1000 Montauk HwyWest Islip, NY 11795 (631) 376‑4444
- 301 E Main StBay Shore, NY 11706 (914) 666‑8866
- 530 1st AveNew York, NY 10016
- 550 1st AveNew York, NY 10016
Group practices
Medicare enrollment lists Michael Masseria as a member of these groups (CMS data updated 2026-10-02).
- New York University6,134 clinicians in the group
- North Shore - Lij Anesthesiology, PC1,003 clinicians in the group
- Icahn School of Medicine at Mount Sinai176 clinicians in the group
- Long Island Anesthesiologists, PLLC45 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), New York →
Other nurse anesthetists in Oceanside
Clinicians with the same Medicare primary specialty in Oceanside, NY — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Medical school | University Of Missouri, Columbia School Of Medicine |
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1811454051 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians