Katherine M. Callaghan, M.D.
Obstetrics & Gynecology Physician · Worcester, MA
Katherine M. Callaghan, M.D. is an obstetrics & gynecology physician with a practice address in Worcester, Massachusetts, and NPI 1922329663, issued on Jun 17, 2010. Check the license (Massachusetts 259143, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Katherine M. Callaghan
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 259143 MA
Self-reported in NPPES; status is on the state search - Practice location
- 328 Shrewsbury St, Worcester, MA 01604
- Phone
- (508) 755-4861
- Enumerated
- Jun 17, 2010
- Record last updated
- Jul 7, 2026
- Fax
- (508) 752-1392
- Medicaid ID
- 110099641A MA
- Medicare enrollment
- Enrolled (PECOS I20140827001355); 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 328 Shrewsbury St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kathleen Barry, M.D.Family Medicine Physician1720302391
- Austin Bass, DOFamily Medicine Physician1255892360
- Amy Chang, M.D.Obstetrics & Gynecology Physician1104053842
- Peter Davidow, MDObstetrics & Gynecology Physician1295771970
- Dina Deldon-Saltin, DOObstetrics & Gynecology Physician1922059518
- Jaimee Demone, M.D.Obstetrics & Gynecology Physician1801947924
Verify Katherine M. Callaghan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 259143Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
62 Medicare Part D claims for 26 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Estradiol25 claims
- Progesterone13 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 MIPS final score for 2023 (Medicare payment program): 97 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Physicians For Women's Health, LLCWorcester, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine M. Callaghan among 1,127 obstetrics & gynecology physician records in Massachusetts
Katherine M. Callaghan, 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 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 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 Worcester → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Amy Chang, M.D.Worcester, MA 016041104053842
- Peter Davidow, MDWorcester, MA 016041295771970
- Dina Deldon-Saltin, DOWorcester, MA 016041922059518
- Jaimee Demone, M.D.Worcester, MA 016041801947924
- John Farricy, M.D.Worcester, MA 016041821196965
- Abraham Fischer, MDWorcester, MA 016041700838547
- Tiffany Forti, M.D., M.P.H.Worcester, MA 016041104086453
- Michael Frangieh, MDWorcester, MA 016041225533441
Common questions
What is Katherine M. Callaghan, M.D.'s NPI number?
Katherine M. Callaghan, M.D.'s National Provider Identifier (NPI) is 1922329663, issued on Jun 17, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Katherine M. Callaghan, M.D. located?
The NPPES record lists a practice address at 328 Shrewsbury St, Worcester, MA, 01604. Phone: (508) 755-4861. Providers update this record themselves, so call before visiting.
How can I verify Katherine M. Callaghan, M.D.'s license?
NPPES lists Massachusetts license number 259143, 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 Katherine M. Callaghan, M.D. prescribe under Medicare Part D?
In 2024, Katherine M. Callaghan, M.D. had 62 Medicare Part D claims for 26 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Katherine M. Callaghan, M.D.'s MIPS final score?
The 2023 MIPS final score is 97 of 100. 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.