Timothy P. Nguyen, D.O.
Family Medicine Physician · Elk Grove, CA
Timothy P. Nguyen, D.O. is a family medicine physician with a practice address in Elk Grove, California, and NPI 1144607557, issued on May 5, 2015. Check the license (California 20A18880, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Timothy P. Nguyen
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A18880 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9201 Big Horn Blvd, Elk Grove, CA 95758
- Phone
- (916) 478-5000
- Enumerated
- May 5, 2015
- Record last updated
- Dec 20, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210923002222); accepts Medicare assignment
- Medical or professional school
- Arizona College Of Osteopathic Medicine Mid Western University, 2015
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 9201 Big Horn Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Timothy P. Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A18880Check 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% more Medicare Part D claims than the average family medicine physician in 2024
4,113 Medicare Part D claims for 588 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 136 claims were for opioids.
Most prescribed
- Atorvastatin Calcium283 claims
- Losartan Potassium168 claims
- Amlodipine Besylate165 claims
- Lisinopril161 claims
- Levothyroxine Sodium132 claims
- Hydrochlorothiazide113 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.
Bills Medicare through one group practice
- Permanente Medical Group IncElk Grove, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy P. Nguyen among 17,133 family medicine physician records in California
Timothy P. Nguyen, D.O. 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 2015, is newer than 74% of them.
- NPI issued2015 · 74% of these records are older, 24% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2015 · median 2005 among the 10,652 with a school on file
- Record last updated2021 · 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).
81 family medicine physician records list a practice address in Elk Grove
They are 81 of the 3,596 NPPES records with a practice address in Elk Grove, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Elk Grove → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Ruenell Adams, MDElk Grove, CA 957581740291574
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- Thomas Bzoskie, M.D.Elk Grove, CA 957581013930866
- Jeffrey Carrick, MDElk Grove, CA 957581629070255
- Allen Hall, M.D.Elk Grove, CA 957581760466924
- Jack Jue, M.D.Elk Grove, CA 957581497738306
- Alison Juozokas, M.D.Elk Grove, CA 957581417979949
Common questions
What is Timothy P. Nguyen, D.O.'s NPI number?
Timothy P. Nguyen, D.O.'s National Provider Identifier (NPI) is 1144607557, issued on May 5, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Timothy P. Nguyen, D.O. located?
The NPPES record lists a practice address at 9201 Big Horn Blvd, Elk Grove, CA, 95758. Phone: (916) 478-5000. Providers update this record themselves, so call before visiting.
How can I verify Timothy P. Nguyen, D.O.'s license?
NPPES lists California license number 20A18880, 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 Timothy P. Nguyen, D.O. prescribe under Medicare Part D?
In 2024, Timothy P. Nguyen, D.O. had 4,113 Medicare Part D claims for 588 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.