Tobias Xiao Dong, MD, PHD
NPI 1639638869ActiveIndividual· Internal Medicine· Stanford, CA
Internal Medicine (MD, PHD) in Stanford, California, trained at Un of California, Irvine, College of Medicine (class of 2019). In 2024 Medicare paid $57,179 for 127 patients, and Part D covered 114 of their prescriptions, 87% of them generic.
Overview
| NPI | 1639638869 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD, PHD |
| Sole proprietor | No |
| NPI issued | Mar 18, 2019 |
| Last updated in NPPES | Apr 18, 2024 |
| Certified by provider | Apr 18, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A178767 | 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 | 127 |
|---|---|
| Services billed | 533 across 6 procedure codes |
| Paid by Medicare | $57,179 |
Part D prescriptions in 2024
| Prescriptions (claims) | 114 · 149 30-day fills |
|---|---|
| Patients | 46 |
| Total drug cost | $24,822 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | Un of California, Irvine, College of Medicine |
|---|---|
| Graduation year | 2019 |
| 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
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All 394 internal medicine physicians in Stanford · All internal medicine physicians in California