Quick answers
- Which hospitals does Margaret Chen work at?
- Medicare's official clinician data lists Margaret Chen at 3 hospitals: Long Island Jewish Medical Center, North Shore University Hospital and St Francis Hospital - The Heart Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Margaret Chen see patients?
- Medicare's clinician data lists 2 practice locations, including Flushing, NY and Mount Kisco, NY. Call before your visit to confirm the address.
- What is Margaret Chen's specialty?
- Medicare lists Surgical Oncology as the primary specialty, and also General Surgery.
- Does Margaret Chen accept Medicare assignment?
- Yes. Medicare's clinician data says Margaret Chen 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 Margaret Chen?
- (516) 731-5740, as listed in official Medicare / NPI Registry data.
- What is Margaret Chen's NPI number?
- 1407963192. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Margaret Chen works
Medicare's Facility Affiliation Data lists Margaret Chen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Long Island Jewish Medical CenterNew Hyde Park, NY · Acute Care Hospital · CCN 330195
- North Shore University HospitalManhasset, NY · Acute Care Hospital · CCN 330106
- St Francis Hospital - The Heart CenterRoslyn, NY · Acute Care Hospital · CCN 330182
Practice locations
Addresses where Margaret Chen is enrolled with Medicare (CMS data updated 2026-10-02).
- 3808 Union St, Suite 3eFlushing, NY 11354 (516) 731‑5740
- 90 S Bedford RdMount Kisco, NY 10549 (914) 241‑1050
Group practices
Medicare enrollment lists Margaret Chen as a member of this group (CMS data updated 2026-10-02).
- Optum Medical Care PC1,010 clinicians in the group
Specialties
- Surgical Oncologyprimary
- General Surgeryalso
Other surgical oncologists in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Clinician information
| Graduation year | 1995 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1407963192 |
| 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