MARGARET S. DUFRENEY MD
NPI 1922310705
Obstetrics & Gynecology - Obstetrics in Marlboro, NJ
About Margaret S. Dufreney Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET S. DUFRENEY MD (NPI 1922310705) is an individual obstetrics provider in Marlboro, New Jersey, licensed in New Jersey (25MA10416100) and active in the NPI registry since July 2010. She is enrolled in Medicare PECOS, is affiliated with Centrastate Medical Center, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Margaret S. Dufreney Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show Margaret Dufreney reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Freehold, NJ 07728
- Reassigned Medicare billing, New Jersey enrollment
- Medicare enrollment name: Centrastate Specialists, PC
- 34 clinicians in this Medicare group
Red Bank, NJ 07701
- Reassigned Medicare billing, New Jersey enrollment
- 2,844 clinicians in this Medicare group
Morristown, NJ 07960
- Reassigned Medicare billing, New Jersey enrollment
- 1,699 clinicians in this Medicare group
Greenville, SC 29607
- Reassigned Medicare billing, New Jersey enrollment
- 155 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Centrastate Medical Center
Acute Care Hospitals · Freehold, NJPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 07746 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Margaret Dufreney's NPI number?
The NPI number for Margaret Dufreney is 1922310705. It was assigned to this individual provider in the NPPES registry on July 8, 2010.
Where is Margaret Dufreney located?
Margaret Dufreney practices at 479 County Road 520 Ste A202, Marlboro, NJ 07746. The listed phone number is (732) 837-1130.
What is Margaret Dufreney's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Obstetrics, with taxonomy code 207VX0000X.
Is Margaret Dufreney enrolled in Medicare?
Yes. Margaret Dufreney is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Margaret Dufreney's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Dufreney reassigns Medicare benefits to 4 organizations: Centrastate Specialists, P.C. (Freehold, NJ), Hackensack Meridian Health Medical Group - Specialty Care PC (Red Bank, NJ), Practice Associates Medical Group (Morristown, NJ) and Ob Hospitalist Services New Jersey, PA (Greenville, SC). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Margaret Dufreney's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Margaret Dufreney accept?
Health plans from Oscar Health list Margaret Dufreney as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Margaret Dufreney affiliated with any hospitals?
According to CMS data, Margaret Dufreney is affiliated with Centrastate Medical Center.
When was this NPI record last updated?
The NPPES record for Margaret Dufreney was last updated on May 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Margaret S. Dufreney, MD · NPI 1922310705
Obstetrics physician in Marlboro, New Jersey. Individual provider, active in the CMS NPPES registry since July 8, 2010.
## Identity
- **NPI:** 1922310705 (Entity type: Individual)
- **Enumerated:** July 8, 2010
- **Primary specialty:** Obstetrics & Gynecology - Obstetrics · taxonomy 207VX0000X
- **State license:** 25MA10416100 (New Jersey)
- **Sole proprietor:** No
## Practice location
- **Address:** 479 COUNTY ROAD 520 STE A202, Marlboro, NJ 07746-1087
- **Phone:** (732) 837-1130
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Centrastate Specialists, P.C. (NPI 1700389301, Freehold, NJ); Hackensack Meridian Health Medical Group - Specialty Care PC (NPI 1215989249, Red Bank, NJ); Practice Associates Medical Group (NPI 1427016385, Morristown, NJ); Ob Hospitalist Services New Jersey, PA (NPI 1801169966, Greenville, SC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Pennsylvania State University College Of Medicine, class of 2006
## Record status
- **NPPES last updated:** May 8, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1922310705) · Data from the CMS NPPES public registry.