Quick answers
- Does Geraldine H. O'Sullivan Coyne accept Medicare assignment?
- Yes. Medicare's clinician data says Geraldine H. O'Sullivan Coyne accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Geraldine H. O'Sullivan Coyne's NPI number?
- 1205182318. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Geraldine H. O'Sullivan Coyne works
Medicare's Facility Affiliation Data lists Geraldine H. O'Sullivan Coyne at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Long Island Jewish Medical CenterNew Hyde Park, NY · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 330195
Practice locations
Addresses where Geraldine H. O'Sullivan Coyne is enrolled with Medicare (CMS data updated October 2, 2026).
- 300 Community DrManhasset, NY 11030 (516) 734‑8900
Group practices
Medicare enrollment lists Geraldine H. O'Sullivan Coyne as a member of this group (CMS data updated October 2, 2026).
- North Shore Health System Medical Faculty Group Practice Inc164 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Internal Medicinealso
Other hematologist-oncologists in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Other clinicians in North Shore Health System Medical Faculty Group Practice Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2003 (23 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1205182318 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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