Christina Lydia Chen, DO
NPI 1952661829ActiveIndividual· Internal Medicine, Rheumatology· Covina, CA
Internal Medicine, Rheumatology (DO) with Samy Metyas M.D. Inc, practicing in Covina, California. Their prescriptions cost Medicare Part D more than their services did: $4,050,246 for 4,145 claims, against $513,370 paid for services in 2024. Janssen Biotech, Inc. was the largest of 24 companies reporting payments in 2025, $8,981 in all, mostly consulting fees. Lists Emanate Health Inter-Community Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1952661829 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | May 24, 2012 |
| Last updated in NPPES | Oct 30, 2026 |
| Certified by provider | Oct 30, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | 20A13361 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Rheumatology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 329 |
|---|---|
| Services billed | 26,843 across 102 procedure codes |
| Paid by Medicare | $513,370 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,145 · 6,632 30-day fills |
|---|---|
| Patients | 650 |
| Total drug cost | $4,050,246 |
| Generic share | 81% of claims |
Education and affiliations
| Graduation year | 2012 |
|---|---|
| Medicare specialty | Rheumatology |
| Secondary specialties | Internal Medicine |
Medical group
- Samy Metyas M.D. IncCovina, CA · 3 clinicians
Hospital affiliations
- Emanate Health Inter-Community HospitalCovina, CA
- Pomona Valley Hospital Medical CenterPomona, CA
Industry payments (Open Payments)
- 2025$8,981 · 191 payments from 24 companies
- 2024$4,814 · 232 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $3,066 | 24 |
| Sobi, Inc | $2,286 | 4 |
| Amgen Inc. | $823.64 | 34 |
| Abbvie Inc. | $529.51 | 23 |
| Ucb, Inc. | $445.36 | 23 |
What the 2025 payments were for
- Consulting Fee$4,420 · 2 payments
- Food and Beverage$4,199 · 181 payments
- Education$361.77 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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