Quick answers
- Which hospitals does Mark R. Preston work at?
- Medicare's official clinician data lists Mark R. Preston at 2 hospitals: Newark Beth Israel Medical Center and Trinitas Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark R. Preston see patients?
- Medicare's clinician data lists 5 practice locations, including Newark, NJ, Elizabeth, NJ and Livingston, NJ. Call before your visit to confirm the address.
- What is Mark R. Preston's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Mark R. Preston accept Medicare assignment?
- Yes. Medicare's clinician data says Mark R. Preston 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 Mark R. Preston?
- (908) 994-5500, as listed in official Medicare / NPI Registry data.
- What is Mark R. Preston's NPI number?
- 1902992274. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark R. Preston works
Medicare's Facility Affiliation Data lists Mark R. Preston at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Newark Beth Israel Medical CenterNewark, NJ · Acute Care Hospital · CCN 310002
- Trinitas Regional Medical CenterElizabeth, NJ · Acute Care Hospital · CCN 310027
Practice locations
Addresses where Mark R. Preston is enrolled with Medicare (CMS data updated 2026-10-02).
- 166 Lyons AveNewark, NJ 07112
- 201 Lyons AveNewark, NJ 07112
- 225 Williamson StElizabeth, NJ 07202
- 225 Williamson St, Fl 1Elizabeth, NJ 07202 (908) 994‑5500
- 94 Old Short Hills RdLivingston, NJ 07039
Group practices
Medicare enrollment lists Mark R. Preston as a member of this group (CMS data updated 2026-10-02).
- Barnabas Health Medical Group PC1,070 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Newark
Clinicians with the same Medicare primary specialty in Newark, NJ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Columbia University College Of Physicians And Surgeons |
| Graduation year | 1996 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1902992274 |
| 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