Quick answers
- Which hospitals does On Chen work at?
- Medicare's official clinician data lists On Chen at 1 hospital: Suny/Stony Brook University Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does On Chen see patients?
- Medicare's clinician data lists 1 practice location in Southampton, NY. Call before your visit to confirm the address.
- What is On Chen's specialty?
- Medicare lists Interventional Cardiology as the primary specialty, and also Cardiovascular Disease (Cardiology).
- Does On Chen accept Medicare assignment?
- Yes. Medicare's clinician data says On Chen 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.
- Does On Chen offer telehealth?
- Medicare's clinician data says On Chen offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for On Chen?
- (631) 283-2070, as listed in official Medicare / NPI Registry data.
- What is On Chen's NPI number?
- 1750681912. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where On Chen works
Medicare's Facility Affiliation Data lists On Chen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Suny/Stony Brook University HospitalStony Brook, NY · Acute Care Hospital · CCN 330393
Practice locations
Addresses where On Chen is enrolled with Medicare (CMS data updated 2026-10-02).
- 676 County Rd, 39aSouthampton, NY 11968 (631) 283‑2070
Group practices
Medicare enrollment lists On Chen as a member of this group (CMS data updated 2026-10-02).
- Stony Brook Internists University Faculty Practice Corporation428 clinicians in the group
Specialties
Other interventional cardiologists in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Clinician information
| Graduation year | 2004 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1750681912 |
| 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