Quick answers
- Which hospitals does William Moon work at?
- Medicare's official clinician data lists William Moon at 5 hospitals: Good Samaritan Hospital Medical Center, Northwell Hospital Glen Cove, Plainview Hospital, St Catherine of Siena Hospital and St Charles Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William Moon see patients?
- Medicare's clinician data lists 3 practice locations, including West Islip, NY, Smithtown, NY and Plainview, NY. Call before your visit to confirm the address.
- What is William Moon's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does William Moon accept Medicare assignment?
- Medicare's clinician data says William Moon may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for William Moon?
- (516) 414-4012, as listed in official Medicare / NPI Registry data.
- What is William Moon's NPI number?
- 1568155182. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William Moon works
Medicare's Facility Affiliation Data lists William Moon 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
- Northwell Hospital Glen CoveGlen Cove, NY · Acute Care Hospital · CCN 330181
- Plainview HospitalPlainview, NY · Acute Care Hospital · CCN 330331
- St Catherine of Siena HospitalSmithtown, NY · Acute Care Hospital · CCN 330401
- St Charles HospitalPort Jefferson, NY · Acute Care Hospital · CCN 330246
Practice locations
Addresses where William Moon is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 Montauk HwyWest Islip, NY 11795 (516) 414‑4012
- 50 Route 25aSmithtown, NY 11787 (631) 862‑3000
- 888 Old Country RdPlainview, NY 11803 (516) 625‑1014
Group practices
Medicare enrollment lists William Moon as a member of these groups (CMS data updated 2026-10-02).
- Samaritan Medical Services PC354 clinicians in the group
- Partners in Critical Care LLP28 clinicians in the group
- Physician Assistant Associate PLLC16 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in West Islip
Clinicians with the same Medicare primary specialty in West Islip, NY — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1568155182 |
| 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