Quick answers
- Which hospitals does Jason Simonides work at?
- Medicare's official clinician data lists Jason Simonides at 1 hospital: John T Mather Memorial Hospital of Port Jefferson. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jason Simonides see patients?
- Medicare's clinician data lists 5 practice locations, including Rockville Centre, NY, Port Jefferson, NY and Riverhead, NY. Call before your visit to confirm the address.
- What is Jason Simonides's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Jason Simonides accept Medicare assignment?
- Yes. Medicare's clinician data says Jason Simonides 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 Jason Simonides?
- (516) 536-2800, as listed in official Medicare / NPI Registry data.
- What is Jason Simonides's NPI number?
- 1588384986. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jason Simonides works
Medicare's Facility Affiliation Data lists Jason Simonides 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
Practice locations
Addresses where Jason Simonides is enrolled with Medicare (CMS data updated 2026-10-02).
- 36 Lincoln AveRockville Centre, NY 11570 (516) 536‑2800
- 635 Belle Terre Rd, Suite 204Port Jefferson, NY 11777
- 75 N Country RdPort Jefferson, NY 11777 (631) 473‑1320
- 788 Harrison AveRiverhead, NY 11901 (631) 591‑3801
- 900 Franklin AveValley Stream, NY 11580 (516) 536‑2800
Group practices
Medicare enrollment lists Jason Simonides as a member of this group (CMS data updated 2026-10-02).
- True North Medical Group PC188 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Rockville Centre
Clinicians with the same Medicare primary specialty in Rockville Centre, NY — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588384986 |
| 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