Ryan Ruey-En Sun, MD
NPI 1891430807ActiveIndividual· Urology· Stanford, CA
Urology (MD) in Stanford, California, trained at University of Toronto, Faculty of Medicine (class of 2017). In 2024 Medicare paid $126,184 for 393 patients, and Part D covered 475 of their prescriptions, 79% of them generic. Boston Scientific Corporation was the largest of 2 companies reporting payments in 2025, $1,384 in all, mostly travel and lodging.
Overview
| NPI | 1891430807 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 3, 2022 |
| Last updated in NPPES | Mar 14, 2024 |
| Certified by provider | Mar 14, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Urology Primary | 208800000X | A177263 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Urology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 393 |
|---|---|
| Services billed | 2,642 across 58 procedure codes |
| Paid by Medicare | $126,184 |
Part D prescriptions in 2024
| Prescriptions (claims) | 475 · 958 30-day fills |
|---|---|
| Patients | 188 |
| Total drug cost | $97,481 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | University of Toronto, Faculty of Medicine |
|---|---|
| Graduation year | 2017 |
| Medicare specialty | Urology |
| Telehealth | Offers telehealth |
Medical group
- Stanford Health CareStanford, CA · 3,122 clinicians
Hospital affiliations
- Stanford Health CareStanford, CA
- Stanford Health Care Tri-ValleyPleasanton, CA
Industry payments (Open Payments)
- 2025$1,384 · 8 payments from 2 companies
- 2024$121.41 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boston Scientific Corporation | $769.22 | 6 |
| Intuitive Surgical, Inc. | $615.04 | 2 |
What the 2025 payments were for
- Travel and Lodging$1,151 · 5 payments
- Food and Beverage$233.12 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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