Son Lam Nguyen, M.D.
NPI 1114119526ActiveIndividual· Internal Medicine· Fairfield, CA
Internal Medicine (M.D.) with Permanente Medical Group Inc, practicing in Fairfield, California. In 2024 Medicare paid $85,165 for 372 patients, and Part D covered 472 of their prescriptions, 87% of them generic. Lists Kaiser Foundation Hospital and Rehab Center as a hospital affiliation.
Overview
| NPI | 1114119526 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 10, 2007 |
| Last updated in NPPES | Oct 18, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A100779 | 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 | 372 |
|---|---|
| Services billed | 1,042 across 9 procedure codes |
| Paid by Medicare | $85,165 |
Part D prescriptions in 2024
| Prescriptions (claims) | 472 · 543 30-day fills |
|---|---|
| Patients | 162 |
| Total drug cost | $28,554 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 2004 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Permanente Medical Group IncOakland, CA · 10,996 clinicians
Hospital affiliation
- Kaiser Foundation Hospital and Rehab CenterVallejo, 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 65 internal medicine physicians in Fairfield · All internal medicine physicians in California