Margaret Callahan, MD
Medical Oncology Physician · Farmington, CT
Margaret Callahan, MD is a medical oncology physician with a practice address in Farmington, Connecticut, and NPI 1508098534, issued on Aug 9, 2009. Check the license (Connecticut 075986, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Margaret Callahan
- Credential
- MD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License numbers
- 075986 CT
251318-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- 263 Farmington Ave, Farmington, CT 06030
- Phone
- (860) 679-2100
- Enumerated
- Aug 9, 2009
- Record last updated
- Jan 16, 2024
- Medicare enrollment
- Enrolled (PECOS I20240306001138); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 263 Farmington Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nour Abdallah, MDStudent in an Organized Health Care Education/Training Program1225882509
- Omar Abdelatey, DDSStudent in an Organized Health Care Education/Training Program1700672789
- Samira AbdelrehimStudent in an Organized Health Care Education/Training Program1225823743
- Reham AbdelsalamStudent in an Organized Health Care Education/Training Program1578143707
- Ezzat Abdoun, DDSStudent in an Organized Health Care Education/Training Program1962630905
- Arif Salman Abdul Shakore, B.D.S., M.D.S.Student in an Organized Health Care Education/Training Program1750797387
Verify Margaret Callahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 075986Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 84.4 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: $4,325.00
2 payments; by number, the most common kind was consulting fee; the largest payer was Regeneron Pharmaceuticals, Inc. The 3,343 providers of this specialty with any payment received $11,773.47 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
- University OF Connecticut Health CenterFarmington, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Medical Oncology Physician providers in Connecticut
There are 99 medical oncology physician records in Connecticut.
Other medical oncology physician records in Connecticut
- Ana Acuna-Villaorduna, MDFarmington, CT1538574926
- Omar Al Asad, MDNew Haven, CT1447505110
- Anne Angevine, M.D.Stamford, CT1376668004
- Philippos Apolinario Costa, MDNew Haven, CT1447816202
- Amandeep Aujla, M.D.Waterford, CT1538576111
- Noffar Bar, M.D.New Haven, CT1215179106
- Myra BarginearWestport, CT1467607283
- Aarti Bhatia, M.B.B.S.New Haven, CT1861629180
- Joshua Bilenker, M.D.Stamford, CT1114349149
- Kathleen Bober-Sorcinelli, MDMeriden, CT1740229632
Common questions
What is Margaret Callahan, MD's NPI number?
Margaret Callahan, MD's National Provider Identifier (NPI) is 1508098534, issued on Aug 9, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Callahan, MD located?
The NPPES record lists a practice address at 263 Farmington Ave, Farmington, CT, 06030. Phone: (860) 679-2100. Providers update this record themselves, so call before visiting.
How can I verify Margaret Callahan, MD's license?
NPPES lists Connecticut license number 075986, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Margaret Callahan, MD's MIPS final score?
The 2023 MIPS final score is 84.4 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.