Quick answers
- Which hospitals does Gianna Trillo work at?
- Medicare's official clinician data lists Gianna Trillo at 2 hospitals: 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 Gianna Trillo see patients?
- Medicare's clinician data lists 2 practice locations, including Port Jefferson, NY and Centereach, NY. Call before your visit to confirm the address.
- What is Gianna Trillo's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Gianna Trillo accept Medicare assignment?
- Yes. Medicare's clinician data says Gianna Trillo 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 Gianna Trillo?
- (631) 474-6000, as listed in official Medicare / NPI Registry data.
- What is Gianna Trillo's NPI number?
- 1558259689. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gianna Trillo works
Medicare's Facility Affiliation Data lists Gianna Trillo at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- 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 Gianna Trillo is enrolled with Medicare (CMS data updated 2026-10-02).
- 200 Belle Terre RdPort Jefferson, NY 11777 (631) 474‑6000
- 2112 Middle Country RdCentereach, NY 11720 (631) 468‑6900
Group practices
Medicare enrollment lists Gianna Trillo as a member of this group (CMS data updated 2026-10-02).
- CHS Physician Partners PC743 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Port Jefferson
Clinicians with the same Medicare primary specialty in Port Jefferson, NY — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2025 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1558259689 |
| 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