Thanh Nguyen-Dinh, M.D.
NPI 1063495323ActiveIndividual· Internal Medicine, Geriatric Medicine· San Leandro, CA
Internal Medicine, Geriatric Medicine (M.D.) with John Muir Physician Network, practicing in San Leandro, California. Their prescriptions cost Medicare Part D more than their services did: $183,832 for 3,532 claims, against $93,981 paid for services in 2024. Baxter Healthcare reported $22.74 in payments in 2025, mostly food and beverage. Lists Alta Bates Summit Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1063495323 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Nov 21, 2005 |
| Last updated in NPPES | Dec 27, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Geriatric Medicine Primary | 207RG0300X | 0101-31818 | VA |
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 | 994 |
|---|---|
| Services billed | 1,416 across 33 procedure codes |
| Paid by Medicare | $93,981 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,532 · 7,210 30-day fills |
|---|---|
| Patients | 1,021 |
| Total drug cost | $183,832 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 1974 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Geriatric Medicine |
| Telehealth | Offers telehealth |
Medical group
- John Muir Physician NetworkPleasant Hill, CA · 494 clinicians
Hospital affiliations
- Alta Bates Summit Medical CenterOakland, CA
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
Industry payments (Open Payments)
- 2025$22.74 · 1 payment from 1 company
- 2024$54.59 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Baxter Healthcare | $22.74 | 1 |
What the 2025 payments were for
- Food and Beverage$22.74 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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