Mary Bui
NPI 1841225224 · Nephrology Physician · Upland, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Bui is a Nephrology Physician provider in Upland, CA (NPI 1841225224).
Provider details
- NPI number
- 1841225224
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- 20A8116 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,789 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 750 | $115 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 276 | $341 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 235 | $112 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, First 20 Minutes99457 | 217 | $49 |
| Remote Monitoring of Physiologic Parameters, Initial Supply of Devices With Daily Recordings Or Programmed Alerts Transmission, Each 30 Days99454 | 154 | $49 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, Each Additional 20 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 52 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 163 | 60 |
| Calcitriol | 138 | 50 |
| Losartan Potassium | 125 | 34 |
| Furosemide | 101 | 41 |
| Carvedilol | 90 | 23 |
| Allopurinol | 89 | 31 |
| Chlorthalidone | 78 | 28 |
| Fat Emulsion/Olive/Soy/Phosphobrand: Clinolipid |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$602 across 26 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-12
- Last updated
- 2020-01-30
- Certified
- 2020-01-30
Frequently asked questions
- What is Mary Bui's NPI number?
- Mary Bui's National Provider Identifier (NPI) is 1841225224, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Bui's specialty?
- Mary Bui is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Bui located?
- Mary Bui's practice location on file with NPPES is 1317 W Foothill Blvd, Upland, CA 91786-3676.
- What is Mary Bui's phone number?
- The practice phone number listed in the NPPES registry for Mary Bui is (909) 981-5882.
- Does Mary Bui accept Medicare?
- Mary Bui is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Bui's NPI active?
- Yes — Mary Bui's NPI (1841225224) is active in the NPPES registry as of the last update on 2020-01-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.