Quick answers
- Where does John Tsialas see patients?
- Medicare's clinician data lists 2 practice locations, including Syosset, NY and Lynbrook, NY. Call before your visit to confirm the address.
- What is John Tsialas's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does John Tsialas accept Medicare assignment?
- Yes. Medicare's clinician data says John Tsialas 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 Tsialas?
- (516) 677-9200, as listed in official Medicare / NPI Registry data.
- What is John Tsialas's NPI number?
- 1629008602. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where John Tsialas is enrolled with Medicare (CMS data updated 2026-10-02).
- 358 Jericho TpkeSyosset, NY 11791 (516) 677‑9200
- 585 Merrick RdLynbrook, NY 11563 (516) 764‑2273
Group practices
Medicare enrollment lists John Tsialas as a member of this group (CMS data updated 2026-10-02).
- City Medical of Upper East Side PLLC658 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Syosset
Clinicians with the same Medicare primary specialty in Syosset, NY — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | New York College Of Osteo Medicine Of New York Institute Of Technology |
| Graduation year | 1994 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1629008602 |
| 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
- 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