Dr. Ashwin G. Ramayya, MD, PHD
Neurosurgery (Neurological Surgery 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
- Perelman School of Med at the University of Pennsylvania (2016)
- Years since graduation
- 10
- In the NPI registry since
- 2016
- Medicare patients seen, 2024
- 131
Licensed in California since 2023, 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
- 2016Medical school: Perelman School of Med at the University of Pennsylvania
- 2016Registered 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
-
Neurological Surgery Physician primary
CA license A184508 (first issued 2023; current)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Stanford Health Care Stanford, CA
- Stanford Health Care Tri-Valley Pleasanton, CA
Medical groups
- Stanford Health Care (3,122 clinicians)
- County of Santa Clara (1,022 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
- 131
- Services billed
- 286
- Patients’ average age
- 73
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, 6 companies reported 22 payments worth $9,566 in total to this clinician.
| Biotronik Nro, Inc. | $8,720 |
|---|---|
| Boston Scientific Corporation | $373 |
| Insightec,inc | $185 |
| Livanova USA, Inc. | $138 |
| Medtronic, Inc. | $105 |
| Microtransponder, Inc. | $44.66 |
| Consulting Fee | $7,609 |
|---|---|
| Food and Beverage | $1,138 |
| Travel and Lodging | $818 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Biotronik Nro, Inc. Oct 30, 2025 | Consulting Fee Prospera · Not Applicable Company’s descriptionACH DEBIT | $6,884 |
| Biotronik Nro, Inc. Dec 4, 2025 | Consulting Fee Prospera · Not Applicable Company’s description100374 | $725 |
| Biotronik Nro, Inc. Sep 3, 2025 | Travel and Lodging Prospera · Not Applicable · travel to Portland, OR · in-kind | $315 |
| Biotronik Nro, Inc. May 19, 2025 | Travel and Lodging travel to Portland, OR · in-kind | $221 |
| Biotronik Nro, Inc. Sep 3, 2025 | Travel and Lodging Prospera · Not Applicable · travel to Beaverton, OR · in-kind | $98.40 |
| Biotronik Nro, Inc. Sep 4, 2025 | Travel and Lodging Prospera · Not Applicable · travel to Beaverton, OR · in-kind | $72.00 |
| Biotronik Nro, Inc. Sep 4, 2025 | Travel and Lodging Prospera · Not Applicable · travel to Portland, OR · in-kind | $54.23 |
| Biotronik Nro, Inc. Oct 30, 2025 | Travel and Lodging Prospera · Not Applicable · travel to Orlando, FL Company’s descriptionACH DEBIT | $49.00 |
| Biotronik Nro, Inc. Sep 4, 2025 | Travel and Lodging Prospera · Not Applicable · travel to San Francisco, CA · in-kind | $9.19 |
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.