David W. Wu, MD
NPI 1023015484ActiveIndividual· Internal Medicine, Rheumatology· Walnut Creek, CA
Internal Medicine, Rheumatology (MD) in Walnut Creek, California, trained at Indiana University School of Medicine (class of 1998). Their prescriptions cost Medicare Part D more than their services did: $1,071,791 for 2,053 claims, against $517,050 paid for services in 2024. Janssen Biotech, Inc. was the largest of 24 companies reporting payments in 2025, $3,967 in all, mostly food and beverage.
Overview
| NPI | 1023015484 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 30, 2005 |
| Last updated in NPPES | Oct 25, 2021 |
| Certified by provider | Oct 25, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | A83347 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 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 | 376 |
|---|---|
| Services billed | 50,484 across 27 procedure codes |
| Paid by Medicare | $517,050 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,053 · 3,093 30-day fills |
|---|---|
| Patients | 302 |
| Total drug cost | $1,071,791 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | Indiana University School of Medicine |
|---|---|
| Graduation year | 1998 |
| Medicare specialty | Rheumatology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Arthritis and Rheumatology Medical Associates IncWalnut Creek, CA · 6 clinicians
Hospital affiliations
- Adventist Health SonoraSonora, CA
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
Industry payments (Open Payments)
- 2025$3,967 · 193 payments from 24 companies
- 2024$4,449 · 215 payments from 26 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $594.24 | 36 |
| Ucb, Inc. | $590.41 | 20 |
| Amgen Inc. | $550.28 | 37 |
| Fresenius Kabi USA, LLC | $268.39 | 9 |
| Abbvie Inc. | $249.98 | 19 |
What the 2025 payments were for
- Food and Beverage$3,967 · 193 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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