Quick answers
- Which hospitals does Gregory Persak work at?
- Medicare's official clinician data lists Gregory Persak at 1 hospital: Good Samaritan Hospital Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory Persak see patients?
- Medicare's clinician data lists 1 practice location in West Islip, NY. Call before your visit to confirm the address.
- What is Gregory Persak's specialty?
- Medicare lists Ophthalmology as the primary specialty.
- Does Gregory Persak accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory Persak 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 Gregory Persak?
- (631) 422-1112, as listed in official Medicare / NPI Registry data.
- What is Gregory Persak's NPI number?
- 1952372245. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory Persak works
Medicare's Facility Affiliation Data lists Gregory Persak 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
Practice locations
Addresses where Gregory Persak is enrolled with Medicare (CMS data updated 2026-10-02).
- 360 Montauk HwyWest Islip, NY 11795 (631) 422‑1112
Group practices
Medicare enrollment lists Gregory Persak as a member of this group (CMS data updated 2026-10-02).
- Medical Surgical Eye Care Services PC8 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in West Islip
Clinicians with the same Medicare primary specialty in West Islip, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Boston University School Of Medicine |
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1952372245 |
| 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