Quick answers
- Which hospitals does Phillip A. Maresca work at?
- Medicare's official clinician data lists Phillip A. Maresca at 2 hospitals: Clara Maass Medical Center and Trinitas Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Phillip A. Maresca see patients?
- Medicare's clinician data lists 1 practice location in Elizabeth, NJ. Call before your visit to confirm the address.
- What is Phillip A. Maresca's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Phillip A. Maresca accept Medicare assignment?
- Yes. Medicare's clinician data says Phillip A. Maresca 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 Phillip A. Maresca?
- (908) 994-5422, as listed in official Medicare / NPI Registry data.
- What is Phillip A. Maresca's NPI number?
- 1437456399. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Phillip A. Maresca works
Medicare's Facility Affiliation Data lists Phillip A. Maresca 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
- Trinitas Regional Medical CenterElizabeth, NJ · Acute Care Hospital · CCN 310027
Practice locations
Addresses where Phillip A. Maresca is enrolled with Medicare (CMS data updated 2026-10-02).
- 225 Williamson StElizabeth, NJ 07202 (908) 994‑5422
Group practices
Medicare enrollment lists Phillip A. Maresca as a member of these groups (CMS data updated 2026-10-02).
- RWJBH Observation Associates LLC1,008 clinicians in the group
- RWJBH Emergency Medicine Associates, LLC848 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Elizabeth
Clinicians with the same Medicare primary specialty in Elizabeth, NJ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1437456399 |
| 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