Ihong Chen, MD
NPI 1104822535ActiveIndividual· Internal Medicine· Fountain Valley, CA
Internal Medicine (MD) in Fountain Valley, California, trained at University of Texas Medical School at San Antonio (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $360,202 for 5,955 claims, against $29,873 paid for services in 2024. Amgen Inc. reported $17.00 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1104822535 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 21, 2005 |
| Last updated in NPPES | Jun 12, 2026 |
| Certified by provider | Jun 12, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A49721 | 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 | 148 |
|---|---|
| Services billed | 733 across 32 procedure codes |
| Paid by Medicare | $29,873 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,955 · 14,677 30-day fills |
|---|---|
| Patients | 635 |
| Total drug cost | $360,202 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | University of Texas Medical School at San Antonio |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Memorialcare Medical FoundationLong Beach, CA · 566 clinicians
Hospital affiliation
- Memorialcare Orange Coast Medical CenterFountain Valley, CA
Industry payments (Open Payments)
- 2025$17.00 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $17.00 | 1 |
What the 2025 payments were for
- Food and Beverage$17.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 111 internal medicine physicians in Fountain Valley · All internal medicine physicians in California