Alexander Adu Clerk, M.D.
NPI 1902911381ActiveIndividual· Sleep Specialist, PhD· San Jose, CA
Sleep Specialist, PhD (M.D.) in San Jose, California, trained at Loma Linda University School of Medicine (class of 1975). 178 Medicare patients in 2024, $66,520 paid; all of their 61 Part D prescriptions were generic. Lilly USA, LLC was the largest of 3 companies reporting payments in 2025, $192.06 in all, mostly food and beverage.
Overview
| NPI | 1902911381 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Aug 19, 2006 |
| Last updated in NPPES | Jan 19, 2021 |
| Certified by provider | Jan 19, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Sleep Specialist, PhD Primary | 173F00000X | 448 | CA |
| Psychiatry & Neurology, Psychiatry | 2084P0800X | A36573 | 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 - Psychiatry (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 178 |
|---|---|
| Services billed | 379 across 9 procedure codes |
| Paid by Medicare | $66,520 |
Part D prescriptions in 2024
| Prescriptions (claims) | 61 · 141 30-day fills |
|---|---|
| Patients | 15 |
| Total drug cost | $1,917 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | Loma Linda University School of Medicine |
|---|---|
| Graduation year | 1975 |
| Medicare specialty | Psychiatry |
Hospital affiliation
- Santa Clara Valley Medical CenterSan Jose, CA
Industry payments (Open Payments)
- 2025$192.06 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $121.82 | 1 |
| Inspire Medical Systems, Inc. | $56.97 | 2 |
| 3b Medical, Inc. | $13.27 | 1 |
What the 2025 payments were for
- Food and Beverage$192.06 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records