Quick answers
- Which hospitals does Seth J. Lessner work at?
- Medicare's official clinician data lists Seth J. Lessner at 5 hospitals: Garnet Health Medical Center, Garnet Health Medical Center Catskills, Good Samaritan Hospital of Suffern, Montefiore Medical Center and Nyack Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Seth J. Lessner see patients?
- Medicare's clinician data lists 2 practice locations, including Bronx, NY and Middletown, NY. Call before your visit to confirm the address.
- What is Seth J. Lessner's specialty?
- Medicare lists Cardiac Electrophysiology as the primary specialty, and also Cardiovascular Disease (Cardiology).
- Does Seth J. Lessner accept Medicare assignment?
- Medicare's clinician data says Seth J. Lessner may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for Seth J. Lessner?
- (845) 692-6999, as listed in official Medicare / NPI Registry data.
- What is Seth J. Lessner's NPI number?
- 1972761591. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Seth J. Lessner works
Medicare's Facility Affiliation Data lists Seth J. Lessner at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Garnet Health Medical CenterMiddletown, NY · Acute Care Hospital · CCN 330126
- Garnet Health Medical Center CatskillsHarris, NY · Acute Care Hospital · CCN 330386
- Good Samaritan Hospital of SuffernSuffern, NY · Acute Care Hospital · CCN 330158
- Montefiore Medical CenterBronx, NY · Acute Care Hospital · CCN 330059
- Nyack HospitalNyack, NY · Acute Care Hospital · CCN 330104
Practice locations
Addresses where Seth J. Lessner is enrolled with Medicare (CMS data updated 2026-10-02).
- 111 E 210th StBronx, NY 10467
- 300 Crystal Run RdMiddletown, NY 10941 (845) 692‑6999
Group practices
Medicare enrollment lists Seth J. Lessner as a member of these groups (CMS data updated 2026-10-02).
- Montefiore Medical Center2,820 clinicians in the group
- Crystal Run Healthcare Physicians LLP362 clinicians in the group
Specialties
Other cardiac electrophysiologists in Bronx
Clinicians with the same Medicare primary specialty in Bronx, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York University School Of Medicine |
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1972761591 |
| 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