Dr. Michael A. Spinner, M.D.
Medical Oncology (Medical Oncology Physician)
300 Pasteur Dr
Stanford, CA 94305
Who else practices at this address →
Santa Clara County includes mental health (13% of residents) shortage areas. About shortage areas
- Medicare participating
At a glance
- Medical school
- Vanderbilt University School of Medicine (2014)
- Years since graduation
- 12
- In the NPI registry since
- 2014
- Medicare patients seen, 2024
- 172
Licensed in California since 2016, according to the Medical Board of California. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
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. What an NPI is
Education and training
- 2014Medical school: Vanderbilt University School of Medicine
- 2014Registered with an NPI (national billing number; not a license date)
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
-
Medical Oncology Physician primary
CA license A140983 (first issued 2016; current)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- UCSF Medical Center San Francisco, CA
Medical groups
- University of California San Francisco (1,839 clinicians)
- UCSF Medical Group Business Services (1,598 clinicians)
- Regents of the University of California (732 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
- 172
- Services billed
- 980
- Patients’ average age
- 73
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 40-54 minutes | 240 | 94 |
| New patient office or other outpatient visit, 60-74 minutes | 48 | 48 |
| Established patient office or other outpatient visit, 30-39 minutes | 39 | 31 |
| Biopsy and aspiration of bone marrow sample for diagnosis | 12 | 12 |
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.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Brukinsa (zanubrutinib) | 142 |
| Acyclovir Other prescribers in Stanford, CA | 83 |
| Calquence (acalabrutinib maleate) | 33 |
| Ondansetron Hcl Other prescribers in Stanford, CA | 33 |
| Sulfamethoxazole-Trimethoprim (sulfamethoxazole/trimethoprim) Other prescribers in Stanford, CA | 25 |
| Entecavir | 23 |
| Prednisone Other prescribers in Stanford, CA | 23 |
| Xarelto (rivaroxaban) Other prescribers in Stanford, CA | 13 |
| Allopurinol Other prescribers in Stanford, CA | 12 |
| Prochlorperazine Maleate Other prescribers in Stanford, CA | 11 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 6 companies reported 15 payments worth $6,208 in total to this clinician.
| Pfizer Inc. | $3,969 |
|---|---|
| E.r. Squibb & Sons, L.l.c. | $1,710 |
| One Lambda, Inc. | $319 |
| AbbVie Inc. | $128 |
| Celgene Corporation | $41.73 |
| Adaptive Biotechnologies Corporation | $40.61 |
| Consulting Fee | $5,430 |
|---|---|
| Food and Beverage | $778 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Pfizer Inc. Jul 2, 2025 | Consulting Fee ADCETRIS · ONCOLOGY | $1,860 |
| Pfizer Inc. Jun 24, 2025 | Consulting Fee ADCETRIS · ONCOLOGY | $1,860 |
| E.r. Squibb & Sons, L.l.c. Aug 21, 2025 | Consulting Fee | $855 |
| E.r. Squibb & Sons, L.l.c. Sep 11, 2025 | Consulting Fee | $855 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
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.
Industry-funded research
Named as a principal investigator on 1 industry-funded study in 2025, from 1 company. The companies reported $300,205 in research payments for these studies, mostly to the institutions running them.
- A phase 1 openlabel study to evaluate SGN35C in adults with advanced malignancies
Pfizer Inc.
From CMS Open Payments research payments, where companies name up to five principal investigators per payment. Research payments usually go to hospitals, universities and research sites, not to the investigator personally. A payment is not evidence of wrongdoing.