Katharine C. Barnes, M.D.
Obstetrics & Gynecology Physician · Boston, MA
Katharine C. Barnes, M.D. is an obstetrics & gynecology physician with a practice address in Boston, Massachusetts, and NPI 1891007803, issued on Jul 7, 2010. Check the license (Massachusetts 244307, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Katharine C. Barnes
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 244307 MA
Self-reported in NPPES; status is on the state search - Practice location
- 330 Brookline Ave, Boston, MA 02215
- Phone
- (617) 667-3736
- Enumerated
- Jul 7, 2010
- Record last updated
- Apr 10, 2025
- Medicare enrollment
- Enrolled (PECOS I20150115001475); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 2010
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,127 in Massachusetts → Look up another NPI →
Also registered at 330 Brookline Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amtul Aala, MDNephrology Physician1174946347
- Elijah AbassStudent in an Organized Health Care Education/Training Program1306784947
- Omar Abdel-Razek, MDInterventional Cardiology Physician1912780008
- Youssef Abdullah, MD, MBAStudent in an Organized Health Care Education/Training Program1346983442
- Najma Abdullahi, MD, MPHStudent in an Organized Health Care Education/Training Program1669213054
- Elisabeth AbelesStudent in an Organized Health Care Education/Training Program1528659760
Verify Katharine C. Barnes in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 244307Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
46 Medicare Part D claims, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
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
- Island Health Inc.Edgartown, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katharine C. Barnes among 1,127 obstetrics & gynecology physician records in Massachusetts
Katharine C. Barnes, M.D. is one of 1,127 obstetrics & gynecology physician records with a practice address in Massachusetts. 73% 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 68% of them.
- NPI issued2010 · 68% of these records are older, 30% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2010 · median 2004 among the 715 with a school on file
- Record last updated2025 · 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 207V00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Massachusetts
There are 1,127 obstetrics & gynecology physician records in Massachusetts.
All 1,127 in Massachusetts → Every provider in Boston → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Samuel Bielak, M.D.Boston, MA 022151508950403
- Anne Davenas, MDBoston, MA 022151306817044
- Dorothy Dowling, MDBoston, MA 022151861447948
- Eric Ganz, M.D.Boston, MA 022151346241858
- Gladys Gibbs, MDBoston, MA 022151801982970
- Rafik Mansour, MDBoston, MA 022151487600136
- Ronald Marcus, M.D.Boston, MA 022151497789283
- Sandra Mason, M.D.Boston, MA 022151891753273
Common questions
What is Katharine C. Barnes, M.D.'s NPI number?
Katharine C. Barnes, M.D.'s National Provider Identifier (NPI) is 1891007803, issued on Jul 7, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Katharine C. Barnes, M.D. located?
The NPPES record lists a practice address at 330 Brookline Ave, Boston, MA, 02215. Phone: (617) 667-3736. Providers update this record themselves, so call before visiting.
How can I verify Katharine C. Barnes, M.D.'s license?
NPPES lists Massachusetts license number 244307, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Katharine C. Barnes, M.D. prescribe under Medicare Part D?
In 2024, Katharine C. Barnes, M.D. had 46 Medicare Part D claims; 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.