Quick answers
- Which hospitals does David P. Mangiameli work at?
- Medicare's official clinician data lists David P. Mangiameli at 5 hospitals: John T Mather Memorial Hospital of Port Jefferson, Long Island Community Hospital, North Shore University Hospital, NYU Langone Hospitals and St Charles Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does David P. Mangiameli see patients?
- Medicare's clinician data lists 2 practice locations, including Patchogue, NY and Riverhead, NY. Call before your visit to confirm the address.
- What is David P. Mangiameli's specialty?
- Medicare lists General Surgery as the primary specialty, and also Surgical Oncology.
- Does David P. Mangiameli accept Medicare assignment?
- Yes. Medicare's clinician data says David P. Mangiameli 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 David P. Mangiameli?
- (631) 751-3000, as listed in official Medicare / NPI Registry data.
- What is David P. Mangiameli's NPI number?
- 1861659823. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where David P. Mangiameli works
Medicare's Facility Affiliation Data lists David P. Mangiameli at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- John T Mather Memorial Hospital of Port JeffersonPort Jefferson, NY · Acute Care Hospital · CCN 330185
- Long Island Community HospitalPatchogue, NY · Acute Care Hospital · CCN 330141
- North Shore University HospitalManhasset, NY · Acute Care Hospital · CCN 330106
- NYU Langone HospitalsNew York, NY · Acute Care Hospital · CCN 330214
- St Charles HospitalPort Jefferson, NY · Acute Care Hospital · CCN 330246
Practice locations
Addresses where David P. Mangiameli is enrolled with Medicare (CMS data updated 2026-10-02).
- 365 E Main StPatchogue, NY 11772 (631) 751‑3000
- 750 Old Country Rd, Bldg 2Riverhead, NY 11901 (631) 751‑3000
Group practices
Medicare enrollment lists David P. Mangiameli as a member of this group (CMS data updated 2026-10-02).
- North Shore Hematology Oncology Associates PC479 clinicians in the group
Specialties
- General Surgeryprimary
- Surgical Oncologyalso
Other general surgeons in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Midwestern University, Chicago College Of Osteopathic Med |
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1861659823 |
| 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