Quick answers
- Which hospitals does Gregg Cantor work at?
- Medicare's official clinician data lists Gregg Cantor at 3 hospitals: Good Samaritan Hospital Medical Center, Ns/Lij HS Southside Hospital and St Francis Hospital - The Heart Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregg Cantor see patients?
- Medicare's clinician data lists 2 practice locations, including West Islip, NY. Call before your visit to confirm the address.
- What is Gregg Cantor's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Nuclear Medicine.
- Does Gregg Cantor accept Medicare assignment?
- Yes. Medicare's clinician data says Gregg Cantor 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 Gregg Cantor?
- (631) 465-6225, as listed in official Medicare / NPI Registry data.
- What is Gregg Cantor's NPI number?
- 1679936306. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregg Cantor works
Medicare's Facility Affiliation Data lists Gregg Cantor at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Good Samaritan Hospital Medical CenterWest Islip, NY · Acute Care Hospital · CCN 330286
- Ns/Lij HS Southside HospitalBay Shore, NY · Acute Care Hospital · CCN 330043
- St Francis Hospital - The Heart CenterRoslyn, NY · Acute Care Hospital · CCN 330182
Practice locations
Addresses where Gregg Cantor is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 Montauk HwyWest Islip, NY 11795 (631) 465‑6225
- 540 Union BlvdWest Islip, NY 11795 (631) 669‑2255
Group practices
Medicare enrollment lists Gregg Cantor as a member of these groups (CMS data updated 2026-10-02).
- St Francis Hospital99 clinicians in the group
- Cardiac Ekg Interpretation, P. C.57 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in New York →
Other cardiologists in West Islip
Clinicians with the same Medicare primary specialty in West Islip, NY — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2016 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1679936306 |
| 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