William Yang, M.D.
NPI 1609005479ActiveIndividual· Internal Medicine, Nephrology· Northridge, CA
Internal Medicine, Nephrology (M.D.) with Renal Consultants Medical Group, practicing in Northridge, California. Their prescriptions cost Medicare Part D more than their services did: $1,760,688 for 4,495 claims, against $690,435 paid for services in 2024. Bayer Healthcare Pharmaceuticals Inc. was the largest of 17 companies reporting payments in 2025, $12,527 in all, mostly speaking and faculty fees. Lists Northridge Hospital Medical Center as a hospital affiliation.
Overview
| NPI | 1609005479 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 14, 2009 |
| Last updated in NPPES | Jun 10, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | A120820 | 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 933 |
|---|---|
| Services billed | 9,136 across 28 procedure codes |
| Paid by Medicare | $690,435 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,495 · 10,395 30-day fills |
|---|---|
| Patients | 599 |
| Total drug cost | $1,760,688 |
| Generic share | 75% of claims |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- Renal Consultants Medical GroupGranada Hills, CA · 9 clinicians
Hospital affiliation
- Northridge Hospital Medical CenterNorthridge, CA
Other facilities
- Usrc Northridge Roscoe DialysisDialysis facility · Northridge, CA
- Woodland Hills DialysisDialysis facility · Woodland Hills, CA
- Ayva Home Health Services IncHome health agency · Canoga Park, CA
- Greater Valley Home Health, Inc.Home health agency · Canoga Park, CA
- Pristine Home Health IncHome health agency · Burbank, CA
Industry payments (Open Payments)
- 2025$12,527 · 155 payments from 17 companies
- 2024$16,742 · 190 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $7,913 | 25 |
| Scpharmaceuticals Inc. | $2,040 | 4 |
| Amgen Inc. | $561.17 | 29 |
| Astrazeneca Pharmaceuticals LP | $507.07 | 30 |
| Otsuka America Pharmaceutical, Inc. | $322.53 | 12 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$7,380 · 5 payments
- Food and Beverage$3,100 · 146 payments
- Honoraria$2,000 · 1 payment
- Travel and Lodging$28.00 · 1 payment
- Education$18.71 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Nephrology providers in Northridge
- 1457674343
- 1588100168
- 1487993176
- 1407251853
- 1295433415
- 1235056680
- 1962633289
- 1457570376
- 1285961789
- 1144218488
- 1578723508
- 1396364402