Michael Cassidy, M.D.
Surgical Oncology Physician · Boston, MA
Michael Cassidy, M.D. is a surgical oncology physician with a practice address in Boston, Massachusetts, and NPI 1114186905, issued on Jun 5, 2008. Check the license (Massachusetts 243921, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Michael Cassidy
- Credential
- M.D.
- Primary taxonomy
- Surgical Oncology Physician 2086X0206X
- License number
- 243921 MA
Self-reported in NPPES; status is on the state search - Practice location
- 88 E Newton St, Boston, MA 02118
- Phone
- (617) 638-8442
- Enumerated
- Jun 5, 2008
- Entity
- Type 1 · individual
Also registered at 88 E Newton St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jameel Ahmed, MDClinical Cardiac Electrophysiology Physician1326094996
- Barbara Appignani, M.D.Body Imaging Physician1609843234
- Lori Arena, PHARM.D.Pharmacotherapy Pharmacist1902809874
- Lindsay Arnold, PHARM DPharmacotherapy Pharmacist1104046937
- Bridget Asgarian, M.D.Anesthesiology Physician1902169949
- James Becker, M.D.Surgery Physician1760441059
Verify Michael Cassidy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 243921Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
2 hospital and facility affiliations
- Dana-Farber Cancer Institute, Inc.Boston, MA
- Harvard Medical Faculty Phys AT Beth Israel Deaconess Med Ctr IncBoston, MA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Surgical Oncology Physician providers in Massachusetts
There are 43 surgical oncology physician records in Massachusetts.
Other surgical oncology physician records in Massachusetts
- Richard Arenas, MDSpringfield, MA1447345434
- Ricardo Bello Boccardo, MDWorcester, MA1992236020
- Richard Birkett, M.D.Beverly, MA1205199874
- Genevieve Boland, MD, PHDBoston, MA1699801019
- Elizabeth Brady, MDSpringfield, MA1861493132
- Patrick Brophy, MDWinchester, MA1851351159
- Katherina Calvillo, M.D.Boston, MA1619947793
- Diana Caragacianu, MDMilford, MA1053509539
- Jesse Casaubon, D.O.Springfield, MA1861834608
- Monica Da Silva, MDNorth Dartmouth, MA1568412872
Common questions
What is Michael Cassidy, M.D.'s NPI number?
Michael Cassidy, M.D.'s National Provider Identifier (NPI) is 1114186905, issued on Jun 5, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Michael Cassidy, M.D. located?
The NPPES record lists a practice address at 88 E Newton St, Boston, MA, 02118. Phone: (617) 638-8442. Providers update this record themselves, so call before visiting.
How can I verify Michael Cassidy, M.D.'s license?
NPPES lists Massachusetts license number 243921, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://www.mass.gov/orgs/board-of-registration-in-medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.