Quick answers
- Which hospitals does John McCarthy work at?
- Medicare's official clinician data lists John McCarthy at 1 hospital: Staten Island University Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John McCarthy see patients?
- Medicare's clinician data lists 1 practice location in Staten Island, NY. Call before your visit to confirm the address.
- What is John McCarthy's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Pediatric Medicine.
- Does John McCarthy accept Medicare assignment?
- Yes. Medicare's clinician data says John McCarthy 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 McCarthy?
- (718) 668-9300, as listed in official Medicare / NPI Registry data.
- What is John McCarthy's NPI number?
- 1235103342. 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 McCarthy works
Medicare's Facility Affiliation Data lists John McCarthy at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Staten Island University HospitalStaten Island, NY · Acute Care Hospital · CCN 330160
Practice locations
Addresses where John McCarthy is enrolled with Medicare (CMS data updated 2026-10-02).
- 3000 Hylan BlvdStaten Island, NY 10306 (718) 668‑9300
Specialties
- Internal Medicineprimary
- Pediatric Medicinealso
Other internal medicine doctors in Staten Island
Clinicians with the same Medicare primary specialty in Staten Island, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York College Of Osteo Medicine Of New York Institute Of Technology |
| Graduation year | 1996 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1235103342 |
| 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