Quick answers
- Which hospitals does Jennifer D. Marshak work at?
- Medicare's official clinician data lists Jennifer D. Marshak at 5 hospitals: Good Samaritan Hospital Medical Center, John T Mather Memorial Hospital of Port Jefferson, Long Island Community Hospital, North Shore University Hospital and Suny/Stony Brook University Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jennifer D. Marshak see patients?
- Medicare's clinician data lists 2 practice locations, including Patchogue, NY and Smithtown, NY. Call before your visit to confirm the address.
- What is Jennifer D. Marshak's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Jennifer D. Marshak accept Medicare assignment?
- Yes. Medicare's clinician data says Jennifer D. Marshak 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.
- Does Jennifer D. Marshak offer telehealth?
- Medicare's clinician data says Jennifer D. Marshak offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Jennifer D. Marshak?
- (631) 751-3000, as listed in official Medicare / NPI Registry data.
- What is Jennifer D. Marshak's NPI number?
- 1750365912. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jennifer D. Marshak works
Medicare's Facility Affiliation Data lists Jennifer D. Marshak 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
- John T Mather Memorial Hospital of Port JeffersonPort Jefferson, NY · Acute Care Hospital · CCN 330185
- Long Island Community HospitalPatchogue, NY · Acute Care Hospital · CCN 330141
- North Shore University HospitalManhasset, NY · Acute Care Hospital · CCN 330106
- Suny/Stony Brook University HospitalStony Brook, NY · Acute Care Hospital · CCN 330393
Practice locations
Addresses where Jennifer D. Marshak is enrolled with Medicare (CMS data updated 2026-10-02).
- 365 E Main StPatchogue, NY 11772 (631) 751‑3000
- 48 Route 25aSmithtown, NY 11787 (631) 751‑3000
Group practices
Medicare enrollment lists Jennifer D. Marshak as a member of this group (CMS data updated 2026-10-02).
- North Shore Hematology Oncology Associates PC479 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Patchogue
Clinicians with the same Medicare primary specialty in Patchogue, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Duke University School Of Medicine |
| Graduation year | 1996 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1750365912 |
| 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