Viet Lac Bui, MD, PHD
Rheumatology Physician · Torrance, CA
Viet Lac Bui, MD, PHD is a rheumatology physician with a practice address in Torrance, California, and NPI 1396092227, issued on Aug 9, 2012. Check the license (California A128401, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Viet Lac Bui
- Credential
- MD, PHD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- A128401 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1000 W Carson St # 470, Torrance, CA 90502
- Phone
- (310) 222-3697
- Enumerated
- Aug 9, 2012
- Record last updated
- Nov 26, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (310) 782-0595
- Medicare enrollment
- Enrolled (PECOS I20170816003427); may accept Medicare assignment
- Medical or professional school
- New York University School Of Medicine, 2012
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 1000 W Carson St # 470
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rosalinda Moran, NPFamily Nurse Practitioner1053511014
Verify Viet Lac Bui in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A128401Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average rheumatology physician in 2024
227 Medicare Part D claims for 43 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 52% of claims. 31 claims were for opioids.
Most prescribed
- Methotrexate54 claims
- Hydrocodone-Acetaminophen22 claims
- Pregabalin16 claims
- Rasuvo15 claims
- Actemra13 claims
- Lyrica12 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: $22.87
1 payment: food and beverage; the largest payer was Pfizer Inc. The 4,486 providers of this specialty with any payment received $8,538.33 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.
Viet Lac Bui among 926 rheumatology physician records in California
Viet Lac Bui, MD, PHD is one of 926 rheumatology physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 71% of them.
- NPI issued2012 · 71% of these records are older, 25% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2012 · median 2003 among the 641 with a school on file
- Record last updated2018 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in Torrance → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- William Chin, M.D.Torrance, CA 905021790995769
- Dilrukshie Cooray, M.D.Torrance, CA 905021366548646
- George Karpouzas, M.D.Torrance, CA 905021154384303
- Michael Liebling, M.D.Torrance, CA 905021386691376
- Oleg Stens, MDTorrance, CA 905021932634839
- Morteza Azimian, M.D.Torrance, CA 905031295940229
- Steve Aziz, M.D.Torrance, CA 905031982966271
- Michael Duffin, M.D.Torrance, CA 905031578587309
Common questions
What is Viet Lac Bui, MD, PHD's NPI number?
Viet Lac Bui, MD, PHD's National Provider Identifier (NPI) is 1396092227, issued on Aug 9, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Viet Lac Bui, MD, PHD located?
The NPPES record lists a practice address at 1000 W Carson St # 470, Torrance, CA, 90502. Phone: (310) 222-3697. Providers update this record themselves, so call before visiting.
How can I verify Viet Lac Bui, MD, PHD's license?
NPPES lists California license number A128401, 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 Viet Lac Bui, MD, PHD prescribe under Medicare Part D?
In 2024, Viet Lac Bui, MD, PHD had 227 Medicare Part D claims for 43 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.