Dr. David S. Shields, MD
Gastroenterology (Gastroenterology 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
- University of California, San Francisco School of Medicine (1978)
- Years since graduation
- 48
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 52
Licensed in California since 1980, 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. 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
- 1978Medical school: University of California, San Francisco School of Medicine
- 2006Registered 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
-
Gastroenterology Physician primary
CA license G43100 (first issued 1980; current) -
Internal Medicine Physician
CA license G43100 (first issued 1980; current)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- San Mateo Medical Center San Mateo, CA
Medical groups
- County of San Mateo (310 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
- 52
- Services billed
- 60
- Patients’ average age
- 68
| Service | Times | Patients |
|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 15 | 15 |
| Diagnostic exam of large bowel using a flexible endoscope | 15 | 15 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 14 | 14 |
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 |
|---|---|
| Entecavir | 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, 1 companies reported 5 payments worth $22,026 in total to this clinician.
| Capsovision, Inc. | $22,026 |
|---|
| Consulting Fee | $22,000 |
|---|---|
| Food and Beverage | $26.13 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Capsovision, Inc. Jan 8, 2025 | Consulting Fee CapsoCam Colon · Gastroenterology | $7,700 |
| Capsovision, Inc. May 9, 2025 | Consulting Fee CapsoCam Colon · Gastroenterology | $7,150 |
| Capsovision, Inc. Apr 24, 2025 | Consulting Fee CapsoCam Colon · Gastroenterology | $6,050 |
| Capsovision, Inc. Jun 5, 2025 | Consulting Fee CapsoCam Colon · Gastroenterology | $1,100 |
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.