Quick answers
- Which hospitals does Jonathan Gamss work at?
- Medicare's official clinician data lists Jonathan Gamss at 1 hospital: Clara Maass Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jonathan Gamss see patients?
- Medicare's clinician data lists 3 practice locations, including Belleville, NJ, Elizabeth, NJ and Monroe, NY. Call before your visit to confirm the address.
- What is Jonathan Gamss's specialty?
- Medicare lists Emergency Medicine as the primary specialty, and also Internal Medicine.
- Does Jonathan Gamss accept Medicare assignment?
- Yes. Medicare's clinician data says Jonathan Gamss 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 Jonathan Gamss offer telehealth?
- Medicare's clinician data says Jonathan Gamss offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Jonathan Gamss?
- (973) 450-2000, as listed in official Medicare / NPI Registry data.
- What is Jonathan Gamss's NPI number?
- 1598922874. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jonathan Gamss works
Medicare's Facility Affiliation Data lists Jonathan Gamss at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Clara Maass Medical CenterBelleville, NJ · Acute Care Hospital · CCN 310009
Practice locations
Addresses where Jonathan Gamss is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Clara Maass DrBelleville, NJ 07109 (973) 450‑2000
- 225 Williamson StElizabeth, NJ 07202 (908) 994‑5422
- 3 Hamaspik Way, Unit 11Monroe, NY 10950 (845) 782‑0000
Group practices
Medicare enrollment lists Jonathan Gamss as a member of these groups (CMS data updated 2026-10-02).
- RWJBH Emergency Medicine Associates, LLC848 clinicians in the group
- Vladimir Zelenko MD PC12 clinicians in the group
Specialties
- Emergency Medicineprimary
- Internal Medicinealso
Other emergency medicine doctors in Belleville
Clinicians with the same Medicare primary specialty in Belleville, NJ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1598922874 |
| 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