Stephen Sam-Fong Chen, M.D.
NPI 1083844179ActiveIndividual· Internal Medicine· Downey, CA
Internal Medicine (M.D.) with Southern California Permanente Medical Group, practicing in Downey, California. Their prescriptions cost Medicare Part D more than their services did: $5,010 for 141 claims, against $1,680 paid for services in 2024. Pulmonx Corporation reported $17.47 in payments in 2025, mostly food and beverage. Lists Kaiser Foundation Hospital - Downey as a hospital affiliation.
Overview
| NPI | 1083844179 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jul 23, 2009 |
| Last updated in NPPES | Mar 7, 2023 |
| Certified by provider | Nov 6, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A108952 | 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 - Hospitalist (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 15 |
|---|---|
| Services billed | 15 across 2 procedure codes |
| Paid by Medicare | $1,680 |
Part D prescriptions in 2024
| Prescriptions (claims) | 141 · 312 30-day fills |
|---|---|
| Patients | 43 |
| Total drug cost | $5,010 |
| Generic share | 94% of claims |
Education and affiliations
| Graduation year | 2008 |
|---|---|
| Medicare specialty | Hospitalist |
| Secondary specialties | Internal Medicine |
Medical group
- Southern California Permanente Medical GroupRedlands, CA · 11,293 clinicians
Hospital affiliation
- Kaiser Foundation Hospital - DowneyDowney, CA
Industry payments (Open Payments)
- 2025$17.47 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pulmonx Corporation | $17.47 | 1 |
What the 2025 payments were for
- Food and Beverage$17.47 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 129 internal medicine physicians in Downey · All internal medicine physicians in California