Mary Phuong Bui
NPI 1841225224ActiveIndividual· Internal Medicine, Nephrology· Upland, CA
Internal Medicine, Nephrology in Upland, California, trained at At Still University of Health Sciences, College of Osteo Med, Kirksville (class of 1994). In 2024 Medicare paid $529,971 for 623 patients, and Part D covered 2,161 of their prescriptions, 85% of them generic. Astrazeneca Pharmaceuticals LP was the largest of 6 companies reporting payments in 2025, $290.99 in all, mostly food and beverage.
Overview
| NPI | 1841225224 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Jul 12, 2006 |
| Last updated in NPPES | Jan 30, 2020 |
| Certified by provider | Jan 30, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 20A8116 | 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 | 623 |
|---|---|
| Services billed | 8,860 across 53 procedure codes |
| Paid by Medicare | $529,971 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,161 · 4,387 30-day fills |
|---|---|
| Patients | 349 |
| Total drug cost | $275,362 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | At Still University of Health Sciences, College of Osteo Med, Kirksville |
|---|---|
| Graduation year | 1994 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Nephrology Associates of Upland and PomonaUpland, CA · 6 clinicians
Hospital affiliations
- Casa Colina HospitalPomona, CA
- Chino Valley Medical CenterChino, CA
- Montclair Hospital Medical CenterMontclair, CA
- Pomona Valley Hospital Medical CenterPomona, CA
- San Antonio Regional HospitalUpland, CA
Other facilities
- Davita Colton Ranch DialysisDialysis facility · Colton, CA
- Davita Rancho Cucamonga Home TrainingDialysis facility · Rancho Cucamonga, CA
- Davita Upland Colonies DialysisDialysis facility · Upland, CA
- Usrc OntarioDialysis facility · Ontario, CA
Industry payments (Open Payments)
- 2025$290.99 · 14 payments from 6 companies
- 2024$601.54 · 34 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $97.96 | 5 |
| Aurinia Pharma U.S., Inc. | $95.93 | 4 |
| Bard Peripheral Vascular, Inc. | $44.25 | 2 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $20.48 | 1 |
| Akebia Therapeutics Inc | $18.65 | 1 |
What the 2025 payments were for
- Food and Beverage$290.99 · 14 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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