William S. Baek, M.D..
NPI 1326095977ActiveIndividual· Psychiatry & Neurology, Neurology· Upland, CA
Psychiatry & Neurology, Neurology (M.D..) in Upland, California, licensed in CA, with an NPI issued in May 2006. Part D covered 3,167 prescriptions written in 2024, 87% of them generic. Abbvie Inc. was the largest of 20 companies reporting payments in 2025, $11,262 in all, mostly speaking and faculty fees.
Overview
| NPI | 1326095977 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D.. |
| Sole proprietor | No |
| NPI issued | May 28, 2006 |
| Last updated in NPPES | Feb 6, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Neurology Primary | 2084N0400X | A91283 | 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 - Neurology (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 3,167 · 6,629 30-day fills |
|---|---|
| Patients | 489 |
| Total drug cost | $2,869,884 |
| Generic share | 87% of claims |
Industry payments (Open Payments)
- 2025$11,262 · 124 payments from 20 companies
- 2024$13,531 · 149 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $7,087 | 25 |
| Lundbeck LLC | $1,578 | 15 |
| Biogen, Inc. | $653.23 | 14 |
| Ucb, Inc. | $569.86 | 17 |
| Pfizer Inc. | $222.81 | 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$6,500 · 2 payments
- Food and Beverage$3,325 · 118 payments
- Consulting Fee$1,425 · 2 payments
- Travel and Lodging$11.90 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other neurologists in Upland
- 1275586430
- 1649362633
- 1770967622
- 1326202748
- 1386607950
- 1851505432
- 1891935862
- 1992917108
- 1043317217