Deirdre C. Masterton, MD
Obstetrics & Gynecology Physician · Flemington, NJ
Deirdre C. Masterton, MD is an obstetrics & gynecology physician with a practice address in Flemington, New Jersey, and NPI 1235314394, issued on Jan 8, 2008. Check the license (New Jersey 25MA08984000, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Deirdre C. Masterton
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- 25MA08984000 NJ
11711 MT
LP00728 RI
Self-reported in NPPES; status is on the state search - Practice location
- 4 Walter E Foran Blvd, Flemington, NJ 08822
- Phone
- (908) 284-5295
- Enumerated
- Jan 8, 2008
- Record last updated
- Mar 4, 2022
- Fax
- (908) 806-8570
- Medicare enrollment
- Enrolled (PECOS I20111129000166); accepts Medicare assignment
- Medical or professional school
- New York University School Of Medicine, 2004
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,362 in New Jersey → Look up another NPI →
Also registered at 4 Walter E Foran Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Manisha Abeysinghe, MDObstetrics & Gynecology Physician1306807045
- Eric Beck, PTPhysical Therapist1649489501
- Guy Bennett, D.M.D.General Practice Dentistry1316096290
- Jay Benson, D.O.Family Medicine Physician1578881884
- Jonathon Bowden, D.M.D.General Practice Dentistry1184826760
- Robert Bowden, DMDGeneral Practice Dentistry1154433183
Verify Deirdre C. Masterton 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 25MA08984000Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
315 Medicare Part D claims for 109 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Estradiol71 claims
- Alendronate Sodium62 claims
- Nora-Be17 claims
- Fluconazole15 claims
- Clobetasol Propionate14 claims
- Clotrimazole-Betamethasone13 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 88.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $28.81
2 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Advanced Obstetric And Gyn LLCFlemington, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Deirdre C. Masterton among 1,362 obstetrics & gynecology physician records in New Jersey
Deirdre C. Masterton, MD is one of 1,362 obstetrics & gynecology physician records with a practice address in New Jersey. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 59% of them.
- NPI issued2008 · 59% of these records are older, 37% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2004 · median 2003 among the 900 with a school on file
- Record last updated2022 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
14 obstetrics & gynecology physician records list a practice address in Flemington
They are 14 of the 978 NPPES records with a practice address in Flemington, and 1,362 obstetrics & gynecology physician records in New Jersey.
All 1,362 in New Jersey → Every provider in Flemington → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Manisha Abeysinghe, MDFlemington, NJ 088221306807045
- Patricia Ardise, M.D.Flemington, NJ 088221770526550
- Yelena Belkina, MDFlemington, NJ 088221326561754
- Mamie Bowers, MDFlemington, NJ 088221124014402
- Melissa Camiolo, M.D.Flemington, NJ 088221124339353
- Kelly Frys, D.O.Flemington, NJ 088221588923833
- Kara Goglia, M.D.Flemington, NJ 088221427282987
- Michele Grove, MDFlemington, NJ 088221528054608
Common questions
What is Deirdre C. Masterton, MD's NPI number?
Deirdre C. Masterton, MD's National Provider Identifier (NPI) is 1235314394, issued on Jan 8, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Deirdre C. Masterton, MD located?
The NPPES record lists a practice address at 4 Walter E Foran Blvd, Flemington, NJ, 08822. Phone: (908) 284-5295. Providers update this record themselves, so call before visiting.
How can I verify Deirdre C. Masterton, MD's license?
NPPES lists New Jersey license number 25MA08984000, 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 Deirdre C. Masterton, MD prescribe under Medicare Part D?
In 2024, Deirdre C. Masterton, MD had 315 Medicare Part D claims for 109 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Deirdre C. Masterton, MD's MIPS final score?
The 2023 MIPS final score is 88.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.