Justin Ngoc Nguyen, DO
Psychiatry Physician · Ventura, CA
Justin Ngoc Nguyen, DO is a psychiatry physician with a practice address in Ventura, California, and NPI 1659909000, issued on Mar 31, 2020. Check the license (California 21212, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Justin Ngoc Nguyen
- Credential
- DO
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 21212 CA
Self-reported in NPPES; status is on the state search - Practice location
- 147 N Brent St, Ventura, CA 93003
- Phone
- (805) 948-5672
- Enumerated
- Mar 31, 2020
- Record last updated
- Jul 10, 2024
- Medicare enrollment
- Enrolled (PECOS I20240402003070); accepts Medicare assignment
- Medical or professional school
- Touro Un College Of Osteopathic Medicine, Vallejo, 2020
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 147 N Brent St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Adnan Albrejawi Alhomsi, MDStudent in an Organized Health Care Education/Training Program1144023003
Verify Justin Ngoc Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 21212Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average psychiatry physician in 2024
194 Medicare Part D claims for 31 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Duloxetine Hcl25 claims
- Hydroxyzine Hcl23 claims
- Trazodone Hcl18 claims
- Gabapentin12 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 2 group practices
- Community Memorial Health SystemFillmore, CA
- Community Physicians OF Ventura CountyVentura, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Justin Ngoc Nguyen among 8,673 psychiatry physician records in California
Justin Ngoc Nguyen, DO is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 87% of them.
- NPI issued2020 · 87% of these records are older, 9% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated2020 · median 2005 among the 3,295 with a school on file
- Record last updated2024 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
74 psychiatry physician records list a practice address in Ventura
They are 74 of the 4,435 NPPES records with a practice address in Ventura, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Ventura → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Beena Anantharaman, M.D.Ventura, CA 930031396713376
- Ralph Armstrong, M.D.Ventura, CA 930031518016443
- Sumathi Balaraman, DOVentura, CA 930031902995707
- Pedro EvaVentura, CA 930031962444703
- Michael Ferguson, M.D.Ventura, CA 930031770586851
- Nomi Fredrick, M.D.Ventura, CA 930031538192471
- Gregory Gray, MDVentura, CA 930031326129479
- Victoria Hendrick, M.D.Ventura, CA 930031205943131
Common questions
What is Justin Ngoc Nguyen, DO's NPI number?
Justin Ngoc Nguyen, DO's National Provider Identifier (NPI) is 1659909000, issued on Mar 31, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Justin Ngoc Nguyen, DO located?
The NPPES record lists a practice address at 147 N Brent St, Ventura, CA, 93003. Phone: (805) 948-5672. Providers update this record themselves, so call before visiting.
How can I verify Justin Ngoc Nguyen, DO's license?
NPPES lists California license number 21212, 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 Justin Ngoc Nguyen, DO prescribe under Medicare Part D?
In 2024, Justin Ngoc Nguyen, DO had 194 Medicare Part D claims for 31 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.