Quick answers
- Which hospitals does John J. Asheld Iii work at?
- Medicare's official clinician data lists John J. Asheld Iii at 4 hospitals: Chsli St Joseph Hospital, Good Samaritan Hospital Medical Center, St Catherine of Siena Hospital and St Francis Hospital - The Heart Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John J. Asheld Iii see patients?
- Medicare's clinician data lists 2 practice locations, including West Islip, NY. Call before your visit to confirm the address.
- What is John J. Asheld Iii's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does John J. Asheld Iii accept Medicare assignment?
- Yes. Medicare's clinician data says John J. Asheld Iii 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 J. Asheld Iii?
- (631) 465-6225, as listed in official Medicare / NPI Registry data.
- What is John J. Asheld Iii's NPI number?
- 1699935973. 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 J. Asheld Iii works
Medicare's Facility Affiliation Data lists John J. Asheld Iii at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Chsli St Joseph HospitalBethpage, NY · Acute Care Hospital · CCN 330332
- Good Samaritan Hospital Medical CenterWest Islip, NY · Acute Care Hospital · CCN 330286
- St Catherine of Siena HospitalSmithtown, NY · Acute Care Hospital · CCN 330401
- St Francis Hospital - The Heart CenterRoslyn, NY · Acute Care Hospital · CCN 330182
Practice locations
Addresses where John J. Asheld Iii is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 Montauk HwyWest Islip, NY 11795 (631) 465‑6225
- 540 Union BlvdWest Islip, NY 11795 (631) 669‑2255
Group practices
Medicare enrollment lists John J. Asheld Iii as a member of these groups (CMS data updated 2026-10-02).
- St Francis Hospital99 clinicians in the group
- Cardiac Ekg Interpretation, P. C.57 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in New York →
Other cardiologists in West Islip
Clinicians with the same Medicare primary specialty in West Islip, NY — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | New York College Of Osteo Medicine Of New York Institute Of Technology |
| Graduation year | 2008 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1699935973 |
| 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