Loc Dac Bui, M.D.
Internal Medicine Physician · Westminster, CA
Loc Dac Bui, M.D. is an internal medicine physician with a practice address in Westminster, California, and NPI 1023081387, issued on Feb 8, 2006. Check the license (California A50198, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Loc Dac Bui
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A50198 CA
Self-reported in NPPES; status is on the state search - Practice location
- 8900 Bolsa Ave, Westminster, CA 92683
- Phone
- (714) 897-2623
- Enumerated
- Feb 8, 2006
- Record last updated
- May 13, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (714) 379-0343
- Medicaid ID
- 00A501980 CA
- Medicare enrollment
- Enrolled (PECOS I20101123000285); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 8900 Bolsa Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ngoc Ahn Huynh, PHARMACISTPharmacist1730365164
Verify Loc Dac Bui in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A50198Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% more Medicare Part D claims than the average internal medicine physician in 2024
4,245 Medicare Part D claims for 169 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 32 claims were for opioids.
Most prescribed
- Atorvastatin Calcium354 claims
- Losartan Potassium278 claims
- Amlodipine Besylate268 claims
- Celecoxib208 claims
- Omeprazole205 claims
- Metformin Hcl187 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $299.93
3 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Family Choice Aco IncWestminster, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Loc Dac Bui among 17,696 internal medicine physician records in California
Loc Dac Bui, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1972 · median 2004 among the 11,065 with a school on file
- Record last updated2020 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
43 internal medicine physician records list a practice address in Westminster
They are 43 of the 1,306 NPPES records with a practice address in Westminster, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Westminster → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Andy Ho, M.D.Westminster, CA 926831801850821
- Vu Le, M.D.Westminster, CA 926831013992791
- Dean Ngo, MDWestminster, CA 926831982690582
- Loan Ngo, M.D.Westminster, CA 926831386696144
- Phuc Nguyen, M.D.Westminster, CA 926831134123961
- Vuong Nguyen, M.D.Westminster, CA 926831093701690
- Hoa Nguyen, M.DWestminster, CA 926831619931763
- Dao Nguyen, MDWestminster, CA 926831811948680
Common questions
What is Loc Dac Bui, M.D.'s NPI number?
Loc Dac Bui, M.D.'s National Provider Identifier (NPI) is 1023081387, issued on Feb 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Loc Dac Bui, M.D. located?
The NPPES record lists a practice address at 8900 Bolsa Ave, Westminster, CA, 92683. Phone: (714) 897-2623. Providers update this record themselves, so call before visiting.
How can I verify Loc Dac Bui, M.D.'s license?
NPPES lists California license number A50198, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Loc Dac Bui, M.D. prescribe under Medicare Part D?
In 2024, Loc Dac Bui, M.D. had 4,245 Medicare Part D claims for 169 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.