Dr. Michael R. Cassidy, M.D.
Surgical Oncology (Surgical Oncology Physician)
- Medicare participating
At a glance
- Medical school
- Boston University School of Medicine (2008)
- Years since graduation
- 18
- In the NPI registry since
- 2008
- Medicare patients seen, 2024
- 113
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2008Medical school: Boston University School of Medicine
- 2008Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Surgical Oncology Physician primary
MA license 243921 -
Surgery Physician
MA license 243921
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Brigham and Women's Hospital Boston, MA
- Beth Israel Deaconess Medical Center Boston, MA
- Boston Medical Center Boston, MA
- Beth Israel Deaconess Hospital - Needham Needham, MA
Medical groups
- Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc (1,740 clinicians)
- Dana-Farber Cancer Institute, Inc. (684 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 113
- Services billed
- 196
- Patients’ average age
- 70
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 20-29 minutes | 70 | 66 |
| New patient office or other outpatient visit, 45-59 minutes | 17 | 17 |
| Established patient office or other outpatient visit, 30-39 minutes | 12 | 12 |
| Partial removal of breast | 12 | 11 |
| New patient office or other outpatient visit, 60-74 minutes | 12 | 12 |
| Biopsy or removal of deep lymph nodes of underarm | 11 | 11 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Payments from drug and device companies
In 2025, 1 companies reported 1 payments worth $18.80 in total to this clinician.
| Bard Peripheral Vascular, Inc. | $18.80 |
|---|
| Food and Beverage | $18.80 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.