Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mark J Seigel, MD

Individual provider Obstetrics & Gynecology Physician · NPI 1366438178

Mark J Seigel, MD practises Obstetrics/Gynecology in Freehold, New Jersey. Graduated from George Washington University School of Medicine in 1980, 46 years ago. Practices with Barnabas Health Medical Group PC, a 1,025-clinician group and accepts Medicare assignment. Licensed in New Jersey.

Years since qualifying
46
Trained at
George Washington University School of Medicine
Licensed in
NJ
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

501 Iron Bridge Rd Ste 4
Freehold, NJ 07728 Not confirmed with CMS for 14 years — call before visiting
Phone: (732) 431-1807
Fax: (732) 409-2777
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence 25MA04416500 (NJ)

Record details

NPI number1366438178
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 27, 2005
Last updated in NPPESSeptember 20, 2012

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1980 (46 years in practice)
Group practice Barnabas Health Medical Group Pc — 1025 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients183
Services billed 378 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Barnabas Health Medical Group PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1025 clinicians in the practice; 12 are shown here.

Other providers in Freehold