Wayne K. Tsang, M.D.
NPI 1588707194ActiveIndividual· Internal Medicine, Nephrology· Torrance, CA
Internal Medicine, Nephrology (M.D.) in Torrance, California, trained at University of Michigan Medical School (class of 1981). Their prescriptions cost Medicare Part D more than their services did: $540,625 for 2,342 claims, against $143,852 paid for services in 2024. Bayer Healthcare Pharmaceuticals Inc. was the largest of 4 companies reporting payments in 2025, $534.01 in all, mostly food and beverage.
Overview
| NPI | 1588707194 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 14, 2007 |
| Last updated in NPPES | Aug 23, 2024 |
| Certified by provider | Aug 23, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | G70393 | CA |
| Internal Medicine | 207R00000X | G70393 | 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 - Nephrology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 243 |
|---|---|
| Services billed | 1,198 across 21 procedure codes |
| Paid by Medicare | $143,852 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,342 · 5,966 30-day fills |
|---|---|
| Patients | 222 |
| Total drug cost | $540,625 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | University of Michigan Medical School |
|---|---|
| Graduation year | 1981 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Hospital affiliations
- Providence Little Company of Mary Med Ctr TorranceTorrance, CA
- Torrance Memorial Medical CenterTorrance, CA
Other facilities
- Usrc Earl Street DialysisDialysis facility · Torrance, CA
- Usrc Gardena DialysisDialysis facility · Gardena, CA
- Usrc Pacific GatewayDialysis facility · Gardena, CA
- Usrc Torrance DialysisDialysis facility · Torrance, CA
Industry payments (Open Payments)
- 2025$534.01 · 15 payments from 4 companies
- 2024$452.46 · 19 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $475.62 | 12 |
| Novartis Pharmaceuticals Corporation | $21.69 | 1 |
| Ardelyx, Inc. | $19.78 | 1 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $16.92 | 1 |
What the 2025 payments were for
- Food and Beverage$534.01 · 15 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 44 nephrologists in Torrance · All nephrologists in California