Dat William Nguyen, MD
Family Medicine Physician · La Mesa, CA
Dat William Nguyen, MD is a family medicine physician with a practice address in La Mesa, California, and NPI 1386626448, issued on Nov 15, 2005. Check the license (California A83262, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Dat William Nguyen
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A83262 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5565 Grossmont Center Dr Ste 229, La Mesa, CA 91942
- Phone
- (858) 349-3760
- Enumerated
- Nov 15, 2005
- Record last updated
- Aug 2, 2023
- Fax
- (619) 262-8964
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 5565 Grossmont Center Dr Ste 229
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brandon Ro, MSN, PMHNPPsychiatric/Mental Health Nurse Practitioner1487381059
Verify Dat William Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A83262Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average family medicine physician in 2024
2,970 Medicare Part D claims for 134 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 39 claims were for opioids.
Most prescribed
- Atorvastatin Calcium121 claims
- Eliquis94 claims
- Metformin Hcl92 claims
- Gabapentin80 claims
- Olanzapine79 claims
- Levothyroxine Sodium75 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.
Dat William Nguyen among 17,133 family medicine physician records in California
Dat William Nguyen, MD is one of 17,133 family medicine 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2023 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
67 family medicine physician records list a practice address in La Mesa
They are 67 of the 2,168 NPPES records with a practice address in La Mesa, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in La Mesa → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Joseph Aiello, D.O.La Mesa, CA 919421104844380
- James Amberg, MDLa Mesa, CA 919421265497093
- Adrianna Dangremond, MDLa Mesa, CA 919421508802828
- Frederick Jenkin, PHYSICIANLa Mesa, CA 919421225069123
- Bradham Kesling, M.D.La Mesa, CA 919421841224805
- Maria Lai, M.D.La Mesa, CA 919421588645048
- Robert Lajvardi, MDLa Mesa, CA 919421235187568
- Paula Leibham, NPLa Mesa, CA 919421114944899
Common questions
What is Dat William Nguyen, MD's NPI number?
Dat William Nguyen, MD's National Provider Identifier (NPI) is 1386626448, issued on Nov 15, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Dat William Nguyen, MD located?
The NPPES record lists a practice address at 5565 Grossmont Center Dr Ste 229, La Mesa, CA, 91942. Phone: (858) 349-3760. Providers update this record themselves, so call before visiting.
How can I verify Dat William Nguyen, MD's license?
NPPES lists California license number A83262, 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 Dat William Nguyen, MD prescribe under Medicare Part D?
In 2024, Dat William Nguyen, MD had 2,970 Medicare Part D claims for 134 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.