Quick answers
- Which hospitals does David L. Kreitzman work at?
- Medicare's official clinician data lists David L. Kreitzman at 3 hospitals: John T Mather Memorial Hospital of Port Jefferson, St Charles Hospital and Suny/Stony Brook University Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does David L. Kreitzman see patients?
- Medicare's clinician data lists 3 practice locations, including West Islip, NY, Port Jefferson, NY and Commack, NY. Call before your visit to confirm the address.
- What is David L. Kreitzman's specialty?
- Medicare lists Neurology as the primary specialty.
- Does David L. Kreitzman accept Medicare assignment?
- Medicare's clinician data says David L. Kreitzman 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 David L. Kreitzman?
- (631) 474-6000, as listed in official Medicare / NPI Registry data.
- What is David L. Kreitzman's NPI number?
- 1427056605. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where David L. Kreitzman works
Medicare's Facility Affiliation Data lists David L. Kreitzman at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- John T Mather Memorial Hospital of Port JeffersonPort Jefferson, NY · Acute Care Hospital · CCN 330185
- St Charles HospitalPort Jefferson, NY · Acute Care Hospital · CCN 330246
- Suny/Stony Brook University HospitalStony Brook, NY · Acute Care Hospital · CCN 330393
Practice locations
Addresses where David L. Kreitzman is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 Montauk HwyWest Islip, NY 11795
- 200 Belle Terre RdPort Jefferson, NY 11777 (631) 474‑6000
- 283 Commack RdCommack, NY 11725 (631) 462‑7774
Group practices
Medicare enrollment lists David L. Kreitzman as a member of these groups (CMS data updated 2026-10-02).
- Good Samaritan Hospital Medical Center165 clinicians in the group
- St Charles Hospital Corp58 clinicians in the group
Specialties
- Neurologyprimary
Other neurologists in West Islip
Clinicians with the same Medicare primary specialty in West Islip, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1427056605 |
| 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