Quick answers
- Which hospitals does John C. Hahn work at?
- Medicare's official clinician data lists John C. Hahn at 1 hospital: CarePoint Health - Bayonne Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John C. Hahn see patients?
- Medicare's clinician data lists 1 practice location in Bayonne, NJ. Call before your visit to confirm the address.
- What is John C. Hahn's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does John C. Hahn accept Medicare assignment?
- Yes. Medicare's clinician data says John C. Hahn 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 C. Hahn?
- (201) 823-0450, as listed in official Medicare / NPI Registry data.
- What is John C. Hahn's NPI number?
- 1538272091. 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 C. Hahn works
Medicare's Facility Affiliation Data lists John C. Hahn at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- CarePoint Health - Bayonne Medical CenterBayonne, NJ · Acute Care Hospital · CCN 310025
Practice locations
Addresses where John C. Hahn is enrolled with Medicare (CMS data updated 2026-10-02).
- 534 Ave E, Suite 1cBayonne, NJ 07002 (201) 823‑0450
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Bayonne
Clinicians with the same Medicare primary specialty in Bayonne, NJ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rutgers New Jersey Medical School |
| Graduation year | 1985 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538272091 |
| 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