Jian A. Chen, M.D.
NPI 1679568612ActiveIndividual· Internal Medicine· Santa Paula, CA
Internal Medicine (M.D.) in Santa Paula, California, trained at University of Southern California Keck School of Medicine (class of 1992). Their prescriptions cost Medicare Part D more than their services did: $803,170 for 7,541 claims, against $116,477 paid for services in 2024. Enterra Medical, Inc. was the largest of 8 companies reporting payments in 2025, $598.88 in all, mostly food and beverage.
Overview
| NPI | 1679568612 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 15, 2005 |
| Last updated in NPPES | Oct 3, 2023 |
| Certified by provider | Oct 3, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | G77775 | 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 | 243 |
|---|---|
| Services billed | 1,834 across 35 procedure codes |
| Paid by Medicare | $116,477 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,541 · 16,457 30-day fills |
|---|---|
| Patients | 451 |
| Total drug cost | $803,170 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Dignity Health Medical FoundationFolsom, CA · 1,184 clinicians
Hospital affiliations
- Community Memorial Hospital - VenturaVentura, CA
- St Johns Regional Medical CenterOxnard, CA
Other facilities
- Access Tlc Home Health CareHome health agency · San Fernando, CA
- Care First Home Health Services, Inc.Home health agency · North Hollywood, CA
- Livingston Memorial Visiting Nurse AssociationHome health agency · Ventura, CA
- Santa Paula Post Acute CenterNursing home · Santa Paula, CA
Industry payments (Open Payments)
- 2025$598.88 · 19 payments from 8 companies
- 2024$579.46 · 23 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Enterra Medical, Inc. | $184.43 | 1 |
| Amgen Inc. | $141.56 | 7 |
| Novo Nordisk Inc | $118.56 | 5 |
| Lilly USA, LLC | $57.04 | 2 |
| Supernus Pharmaceuticals, Inc. | $27.06 | 1 |
What the 2025 payments were for
- Food and Beverage$598.88 · 19 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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