Quick answers
- Which hospitals does John Tsouris work at?
- Medicare's official clinician data lists John Tsouris 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 John Tsouris see patients?
- Medicare's clinician data lists 3 practice locations, including Lake Grove, NY and East Setauket, NY. Call before your visit to confirm the address.
- What is John Tsouris's specialty?
- Medicare lists Podiatry as the primary specialty.
- Does John Tsouris accept Medicare assignment?
- Yes. Medicare's clinician data says John Tsouris 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 John Tsouris?
- (631) 751-4603, as listed in official Medicare / NPI Registry data.
- What is John Tsouris's NPI number?
- 1225032097. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John Tsouris works
Medicare's Facility Affiliation Data lists John Tsouris 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 John Tsouris is enrolled with Medicare (CMS data updated 2026-10-02).
- 2233 Nesconset H'Way, Suite 206Lake Grove, NY 11755 (631) 751‑4603
- 2233 Nesconset Hwy, Suite 206Lake Grove, NY 11755
- 4 Technology Dr, Suite 110East Setauket, NY 11733 (631) 331‑8400
Group practices
Medicare enrollment lists John Tsouris as a member of this group (CMS data updated 2026-10-02).
- Ernest L Isaacson DPM PC5 clinicians in the group
Specialties
- Podiatryprimary
Other podiatrists in Lake Grove
Clinicians with the same Medicare primary specialty in Lake Grove, NY — not a recommendation.
Clinician information
| Credential | DPM |
|---|---|
| Medical school | New York College Of Podiatric Medicine |
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1225032097 |
| 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