Quick answers
- Which hospitals does Mark J. Seigel work at?
- Medicare's official clinician data lists Mark J. Seigel at 3 hospitals: Centrastate Medical Center, Monmouth Medical Center and Riverview Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark J. Seigel see patients?
- Medicare's clinician data lists 2 practice locations, including Freehold, NJ and Lakewood, NJ. Call before your visit to confirm the address.
- What is Mark J. Seigel's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Mark J. Seigel accept Medicare assignment?
- Yes. Medicare's clinician data says Mark J. Seigel 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 J. Seigel?
- (732) 364-8000, as listed in official Medicare / NPI Registry data.
- What is Mark J. Seigel's NPI number?
- 1366438178. 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 J. Seigel works
Medicare's Facility Affiliation Data lists Mark J. Seigel at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Centrastate Medical CenterFreehold, NJ · Acute Care Hospital · CCN 310111
- Monmouth Medical CenterLong Branch, NJ · Acute Care Hospital · CCN 310075
- Riverview Medical CenterRed Bank, NJ · Acute Care Hospital · CCN 310034
Practice locations
Addresses where Mark J. Seigel is enrolled with Medicare (CMS data updated 2026-10-02).
- 3520 US Hwy 9Freehold, NJ 07728
- 475 Hwy 70, Suite 101Lakewood, NJ 08701 (732) 364‑8000
Group practices
Medicare enrollment lists Mark J. Seigel 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 Freehold
Clinicians with the same Medicare primary specialty in Freehold, NJ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | George Washington University School Of Medicine |
| Graduation year | 1980 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366438178 |
| 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