Vivian Bui, MD
NPI 1366748519 · Hospitalist Physician · Sacramento, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Vivian Bui, MD is a Hospitalist Physician provider in Sacramento, CA (NPI 1366748519).
Provider details
- NPI number
- 1366748519
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A129076 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
749 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 35 Minutes99232 | 266 | $84 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 232 | $125 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 138 | $123 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 99 | $183 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 14 | $138 |
Typical Medicare-allowed amounts for these services range $84–$183 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 20 | 19 |
| Atorvastatin Calcium | 18 | 17 |
| Apixabanbrand: Eliquis | 15 | 14 |
| Furosemide | 15 | 15 |
| Amlodipine Besylate | 14 | 12 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 12 | 12 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-02-07
- Last updated
- 2018-11-26
Frequently asked questions
- What is Vivian Bui's NPI number?
- Vivian Bui's National Provider Identifier (NPI) is 1366748519, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Vivian Bui's specialty?
- Vivian Bui is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Vivian Bui located?
- Vivian Bui's practice location on file with NPPES is 4001 J St, Sacramento, CA 95819-3626.
- What is Vivian Bui's phone number?
- The practice phone number listed in the NPPES registry for Vivian Bui is (916) 453-4966.
- Does Vivian Bui accept Medicare?
- Vivian Bui is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Vivian Bui's NPI active?
- Yes — Vivian Bui's NPI (1366748519) is active in the NPPES registry as of the last update on 2018-11-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.