Loc Dac Bui, M.D.
NPI 1023081387ActiveIndividual· Internal Medicine· Westminster, CA
Internal Medicine (M.D.) in Westminster, California, licensed in CA, with an NPI issued in February 2006. Their prescriptions cost Medicare Part D more than their services did: $357,613 for 4,245 claims, against $97,929 paid for services in 2024. Bayer Healthcare Pharmaceuticals Inc. was the largest of 5 companies reporting payments in 2025, $507.20 in all, mostly food and beverage.
Overview
| NPI | 1023081387 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 8, 2006 |
| Last updated in NPPES | May 13, 2020 |
| Certified by provider | May 13, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A50198 | 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 87 |
|---|---|
| Services billed | 1,287 across 17 procedure codes |
| Paid by Medicare | $97,929 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,245 · 7,210 30-day fills |
|---|---|
| Patients | 169 |
| Total drug cost | $357,613 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 1972 |
|---|---|
| Medicare specialty | Internal Medicine |
Industry payments (Open Payments)
- 2025$507.20 · 5 payments from 5 companies
- 2024$299.93 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $144.10 | 1 |
| Abbott Laboratories | $125.31 | 1 |
| Sumitomo Pharma America, Inc. | $109.30 | 1 |
| Redhill Biopharma Inc. | $93.98 | 1 |
| Dexcom, Inc. | $34.51 | 1 |
What the 2025 payments were for
- Food and Beverage$507.20 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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