Quick answers
- Which hospitals does Greg I. Dash work at?
- Medicare's official clinician data lists Greg I. Dash at 3 hospitals: Good Samaritan Hospital Medical Center, St Catherine of Siena Hospital and Suny/Stony Brook University Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Greg I. Dash see patients?
- Medicare's clinician data lists 2 practice locations, including West Islip, NY. Call before your visit to confirm the address.
- What is Greg I. Dash's specialty?
- Medicare lists Otolaryngology as the primary specialty.
- Does Greg I. Dash accept Medicare assignment?
- Yes. Medicare's clinician data says Greg I. Dash 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 Greg I. Dash?
- (631) 422-2700, as listed in official Medicare / NPI Registry data.
- What is Greg I. Dash's NPI number?
- 1538157136. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Greg I. Dash works
Medicare's Facility Affiliation Data lists Greg I. Dash 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
- St Catherine of Siena HospitalSmithtown, NY · Acute Care Hospital · CCN 330401
- Suny/Stony Brook University HospitalStony Brook, NY · Acute Care Hospital · CCN 330393
Practice locations
Addresses where Greg I. Dash is enrolled with Medicare (CMS data updated 2026-10-02).
- 1111 Montack HwyWest Islip, NY 11795
- 1111 Montauk HwyWest Islip, NY 11795 (631) 422‑2700
Specialties
- Otolaryngologyprimary
Other ENT doctors in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Columbia University College Of Physicians And Surgeons |
| Graduation year | 1982 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538157136 |
| 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