Johnny Wu, MD
NPI 1801356290ActiveIndividual· Internal Medicine· Fullerton, CA
Internal Medicine (MD) with Providence Medical Foundation, practicing in Fullerton, California. Their prescriptions cost Medicare Part D more than their services did: $745,223 for 7,016 claims, against $107,551 paid for services in 2024. Amgen Inc. was the largest of 3 companies reporting payments in 2025, $314.99 in all, mostly food and beverage. Lists Providence Holy Cross Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1801356290 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 21, 2019 |
| Last updated in NPPES | Aug 31, 2022 |
| Certified by provider | Aug 31, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A176391 | 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 | 401 |
|---|---|
| Services billed | 1,474 across 34 procedure codes |
| Paid by Medicare | $107,551 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,016 · 16,054 30-day fills |
|---|---|
| Patients | 1,024 |
| Total drug cost | $745,223 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Providence Medical FoundationVictorville, CA · 1,466 clinicians
Hospital affiliations
- Providence Holy Cross Medical CenterMission Hills, CA
- Providence St. Jude Medical CenterFullerton, CA
Other facilities
- Del Rosa Home Health, Inc.Home health agency · Corona, CA
- Elegance Healthcare, IncHome health agency · Tarzana, CA
- Providence at Home With Compassus Home Health Orange CountyHome health agency · Anaheim, CA
- Providence at Home With Compassus Home Health, Inland EmpireHome health agency · Pomona, CA
- Providence at Home With Compassus Home Health, Orange County SouthHome health agency · Irvine, CA
Industry payments (Open Payments)
- 2025$314.99 · 18 payments from 3 companies
- 2024$173.65 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $242.43 | 15 |
| Pfizer Inc. | $55.57 | 2 |
| Lilly USA, LLC | $16.99 | 1 |
What the 2025 payments were for
- Food and Beverage$314.99 · 18 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 56 internal medicine physicians in Fullerton · All internal medicine physicians in California