Stephen In-Sun Ryu, MD
NPI 1134153505ActiveIndividual· Neurological Surgery· Stanford, CA
Neurological Surgery (MD) in Stanford, California, trained at University of California, San Diego School of Medicine (class of 1999). 469 Medicare patients in 2024, $293,679 paid; nearly all of their 54 Part D prescriptions were generic (94%). Globus Medical, Inc. was the largest of 7 companies reporting payments in 2025, $85,212 in all, mostly consulting fees.
Overview
| NPI | 1134153505 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 10, 2006 |
| Last updated in NPPES | Apr 26, 2024 |
| Certified by provider | Apr 26, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Neurological Surgery Primary | 207T00000X | A72659 | 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 - Neurosurgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 469 |
|---|---|
| Services billed | 1,023 across 71 procedure codes |
| Paid by Medicare | $293,679 |
Part D prescriptions in 2024
| Prescriptions (claims) | 54 · 70 30-day fills |
|---|---|
| Patients | 32 |
| Total drug cost | $1,153 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | University of California, San Diego School of Medicine |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Neurosurgery |
| Telehealth | Offers telehealth |
Medical group
- Sutter Bay Medical FoundationFremont, CA · 3,829 clinicians
Hospital affiliations
- Peninsula Medical CenterBurlingame, CA
- Sequoia HospitalRedwood City, CA
Other facilities
- Sutter Care at HomeHome health agency · San Mateo, CA
- Sutter Care at HomeHome health agency · Saratoga, CA
Industry payments (Open Payments)
- 2025$85,212 · 59 payments from 7 companies
- 2024$112,470 · 121 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Globus Medical, Inc. | $74,797 | 41 |
| Medtronic, Inc. | $9,495 | 10 |
| Stryker Corporation | $300.65 | 2 |
| Vb Spine LLC | $222.72 | 1 |
| Carlsmed, Inc. | $184.39 | 2 |
What the 2025 payments were for
- Consulting Fee$41,506 · 13 payments
- Royalty or License$24,290 · 4 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$8,640 · 2 payments
- Travel and Lodging$8,075 · 13 payments
- Food and Beverage$2,701 · 27 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Neurological Surgery providers in Stanford
- 1851341200
- 1679492151
- 1003331000
- 1780736199
- 1407778699
- 1659799138
- 1962962621
- 1821352337
- 1063651446
- 1437214046
- 1659551471
- 1790110914