Mai-Khanh Bui-Duy, M.D.
Internal Medicine Physician · Watsonville, CA
Mai-Khanh Bui-Duy, M.D. is an internal medicine physician with a practice address in Watsonville, California, and NPI 1275858409, issued on Mar 31, 2010. Check the license (California A119506, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mai-Khanh Bui-Duy
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A119506 CA
Self-reported in NPPES; status is on the state search - Practice location
- 45 Neilson St, Watsonville, CA 95076
- Phone
- (831) 728-0222
- Enumerated
- Mar 31, 2010
- Record last updated
- Mar 24, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (831) 707-0277
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 45 Neilson St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marianna Caglieri, R.N.Registered Nurse1922555788
- Patricia Clarke, MDPediatrics Physician1225273436
- Christopher Contini, FNPFamily Nurse Practitioner1710329255
- Rupal Desai, MDPediatrics Physician1992750053
- Devon Francis, M.D.Pediatrics Physician1790960896
- Elise Garrett, CNM, NPObstetrics & Gynecology Nurse Practitioner1811130883
Verify Mai-Khanh Bui-Duy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A119506Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,374 Medicare Part D claims for 82 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims. 173 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen135 claims
- Atorvastatin Calcium106 claims
- Metformin Hcl63 claims
- Losartan Potassium47 claims
- Lisinopril46 claims
- Amlodipine Besylate45 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.
Mai-Khanh Bui-Duy among 17,696 internal medicine physician records in California
Mai-Khanh Bui-Duy, 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 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- 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).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Watsonville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Omid Bakhtar, D.O.Watsonville, CA 950761194953901
- Brendt Carlson, MDWatsonville, CA 950761609916063
- Jacqueline Delyaei, M.D.Watsoville, CA 950761285659169
- Jose Huerta-Ibarra, M.D.Watsonville, CA 950761790791614
- Katherine Kenny, M.D.Watsonville, CA 950761356494397
- Elias Rodriguez, MDWatsonville, CA 950761730295395
- Vaal RothmanWatsonville, CA 950761386624609
- Sara Lackner, MDSoquel, CA 950731225437262
Common questions
What is Mai-Khanh Bui-Duy, M.D.'s NPI number?
Mai-Khanh Bui-Duy, M.D.'s National Provider Identifier (NPI) is 1275858409, issued on Mar 31, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Mai-Khanh Bui-Duy, M.D. located?
The NPPES record lists a practice address at 45 Neilson St, Watsonville, CA, 95076. Phone: (831) 728-0222. Providers update this record themselves, so call before visiting.
How can I verify Mai-Khanh Bui-Duy, M.D.'s license?
NPPES lists California license number A119506, 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 Mai-Khanh Bui-Duy, M.D. prescribe under Medicare Part D?
In 2024, Mai-Khanh Bui-Duy, M.D. had 1,374 Medicare Part D claims for 82 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.