Ryan S. Chiang, MD
NPI 1891323986ActiveIndividual· Internal Medicine· Stanford, CA
Internal Medicine (MD) in Stanford, California, trained at Duke University School of Medicine (class of 2020). In 2024 Medicare paid $96,557 for 258 patients, and Part D covered 100 of their prescriptions, 74% of them generic.
Overview
| NPI | 1891323986 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 1, 2020 |
| Last updated in NPPES | Apr 18, 2024 |
| Certified by provider | Apr 18, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A185873 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 258 |
|---|---|
| Services billed | 921 across 10 procedure codes |
| Paid by Medicare | $96,557 |
Part D prescriptions in 2024
| Prescriptions (claims) | 100 · 117 30-day fills |
|---|---|
| Patients | 34 |
| Total drug cost | $19,678 |
| Generic share | 74% of claims |
Education and affiliations
| Medical school | Duke University School of Medicine |
|---|---|
| Graduation year | 2020 |
| Medicare specialty | Internal Medicine |
Medical group
- Stanford Health CareStanford, CA · 3,122 clinicians
Hospital affiliation
- Stanford Health CareStanford, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other internal medicine physicians in Stanford
- 1003996935
- 1013224195
- 1013273283
- 1043317340
- 1063041986
- 1063554012
- 1083717359
- 1104169168
- 1134515638
- 1174818140
- 1184644262
- 1194923235
All 394 internal medicine physicians in Stanford · All internal medicine physicians in California