Quick answers
- Which hospitals does Naomi P. Ysimura work at?
- Medicare's official clinician data lists Naomi P. Ysimura at 3 hospitals: Good Samaritan Hospital Medical Center, St Catherine of Siena Hospital and St Francis Hospital - The Heart Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Naomi P. Ysimura see patients?
- Medicare's clinician data lists 2 practice locations, including Bay Shore, NY and Smithtown, NY. Call before your visit to confirm the address.
- What is Naomi P. Ysimura's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Naomi P. Ysimura accept Medicare assignment?
- Yes. Medicare's clinician data says Naomi P. Ysimura 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 Naomi P. Ysimura?
- (631) 666-2290, as listed in official Medicare / NPI Registry data.
- What is Naomi P. Ysimura's NPI number?
- 1255138624. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Naomi P. Ysimura works
Medicare's Facility Affiliation Data lists Naomi P. Ysimura 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
- St Francis Hospital - The Heart CenterRoslyn, NY · Acute Care Hospital · CCN 330182
Practice locations
Addresses where Naomi P. Ysimura is enrolled with Medicare (CMS data updated 2026-10-02).
- 1916 Union BlvdBay Shore, NY 11706 (631) 666‑2290
- 269 E Main St, Bldg DSmithtown, NY 11787 (631) 366‑4333
Group practices
Medicare enrollment lists Naomi P. Ysimura as a member of this group (CMS data updated 2026-10-02).
- CHS Physician Partners PC743 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Bay Shore
Clinicians with the same Medicare primary specialty in Bay Shore, NY — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2024 |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1255138624 |
| 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