Mary Howland Williamson, MD
Obstetrics & Gynecology Physician · Bordentown, NJ
Mary Howland Williamson, MD is an obstetrics & gynecology physician with a practice address in Bordentown, New Jersey, and NPI 1770102014, issued on Apr 15, 2020. Check the license (New Jersey 25MA12314600, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mary Howland Williamson
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- 25MA12314600 NJ
MT221474 PA
Self-reported in NPPES; status is on the state search - Practice location
- 100 K Johnson Blvd Ste 102, Bordentown, NJ 08505
- Phone
- (609) 537-7200
- Enumerated
- Apr 15, 2020
- Record last updated
- Jul 31, 2024
- Medicare enrollment
- Enrolled (PECOS I20240814002342); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,362 in New Jersey → Look up another NPI →
Also registered at 100 K Johnson Blvd Ste 102
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Catherine Hagan, CNMAdvanced Practice Midwife1043711120
- Ashley Harvard, MDObstetrics & Gynecology Physician1417574419
Verify Mary Howland Williamson 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 25MA12314600Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
33 Medicare Part D claims for 15 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 36% of 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.
Industry payments in 2024: $13.35
1 payment: food and beverage; the largest payer was Medline Industries LP. 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
- Capital Health Medical GroupLawrenceville, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Howland Williamson among 1,362 obstetrics & gynecology physician records in New Jersey
Mary Howland Williamson, 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 2020, is newer than 92% of them.
- NPI issued2020 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2020 · median 2003 among the 900 with a school on file
- Record last updated2024 · 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).
4 obstetrics & gynecology physician records list a practice address in Bordentown
They are 4 of the 268 NPPES records with a practice address in Bordentown, and 1,362 obstetrics & gynecology physician records in New Jersey.
All 1,362 in New Jersey → Every provider in Bordentown → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Ashley Harvard, MDBordentown, NJ 085051417574419
- Natalia Miranda, M.D.Bordentown, NJ 085051326302399
- Stephanie Schwartz-Kravatz, M.D.Bordentown, NJ 085051659481208
- Michelle Fox, M.D.Belle Mead, NJ 085021790717619
- Debbra Keegan, MDEast Windsor, NJ 085201689737173
- Helen Simigiannis, MDEast Windsor, NJ 085201366497265
- Benoit Mapa, D.O.Jackson, NJ 085271992159420
- Hugh Bergknoff, MDKingston, NJ 085281346300753
Common questions
What is Mary Howland Williamson, MD's NPI number?
Mary Howland Williamson, MD's National Provider Identifier (NPI) is 1770102014, issued on Apr 15, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Mary Howland Williamson, MD located?
The NPPES record lists a practice address at 100 K Johnson Blvd Ste 102, Bordentown, NJ, 08505. Phone: (609) 537-7200. Providers update this record themselves, so call before visiting.
How can I verify Mary Howland Williamson, MD's license?
NPPES lists New Jersey license number 25MA12314600, 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 Mary Howland Williamson, MD prescribe under Medicare Part D?
In 2024, Mary Howland Williamson, MD had 33 Medicare Part D claims for 15 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.