Margaret S. Dufreney, MD
Obstetrics Physician · Marlboro, NJ
Margaret S. Dufreney, MD is an obstetrics physician with a practice address in Marlboro, New Jersey, and NPI 1922310705, issued on Jul 8, 2010. Check the license (New Jersey 25MA10416100, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Margaret S. Dufreney
- Credential
- MD
- Primary taxonomy
- Obstetrics Physician 207VX0000X
- License numbers
- 25MA10416100 NJ
257582 NY
Self-reported in NPPES; status is on the state search - Practice location
- 479 County Road 520 Ste A202, Marlboro, NJ 07746
- Phone
- (732) 837-1130
- Enumerated
- Jul 8, 2010
- Record last updated
- May 8, 2026
- Medicare enrollment
- Enrolled (PECOS I20190724000448); accepts Medicare assignment
- Medical or professional school
- Pennsylvania State University College Of Medicine, 2006
- Entity
- Type 1 · individual
8 nearest obstetrics physician records → All 39 in New Jersey → Look up another NPI →
Verify Margaret S. Dufreney in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MA10416100Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average obstetrics physician in 2024
45 Medicare Part D claims for 15 beneficiaries, against an average of 218 among the 863 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- OB Hospitalist Services New Jersey PAFreehold, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret S. Dufreney among 39 obstetrics physician records in New Jersey
Margaret S. Dufreney, MD is one of 39 obstetrics physician records with a practice address in New Jersey. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 74% of them.
- NPI issued2010 · 74% of these records are older, 21% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated2006 · median 1995 among the 22 with a school on file
- Record last updated2026 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VX0000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics Physician providers in New Jersey
There are 39 obstetrics physician records in New Jersey.
All 39 in New Jersey → Every provider in Marlboro → Obstetrics Physician nationwide →
The 8 obstetrics physician records with the nearest ZIP codes
- Natalya Kugay, MDLong Branch, NJ 077401134326655
- Kala Shankar, MDNeptune, NJ 077531942416763
- Jonathan Baum, MDFreehold, NJ 077281760421978
- Susan Pacana, MDFreehold, NJ 077281497700389
- Rebecca Cipriano, MDColts Neck, NJ 077221396790135
- Anu Chakraborty, M.D.Red Bank, NJ 077011811943541
- Bibiancy Gutierrez, MDTeaneck, NJ 076661780973875
- Glenn Sherman, MDNewton, NJ 078601720066558
Common questions
What is Margaret S. Dufreney, MD's NPI number?
Margaret S. Dufreney, MD's National Provider Identifier (NPI) is 1922310705, issued on Jul 8, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Margaret S. Dufreney, MD located?
The NPPES record lists a practice address at 479 County Road 520 Ste A202, Marlboro, NJ, 07746. Phone: (732) 837-1130. Providers update this record themselves, so call before visiting.
How can I verify Margaret S. Dufreney, MD's license?
NPPES lists New Jersey license number 25MA10416100, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Margaret S. Dufreney, MD prescribe under Medicare Part D?
In 2024, Margaret S. Dufreney, MD had 45 Medicare Part D claims for 15 beneficiaries; the average among obstetrics physician prescribers was 218. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.