Justin Nguyen, DO
NPI 1659909000 · Psychiatry Physician · Ventura, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Justin Nguyen, DO is a Psychiatry Physician provider in Ventura, CA (NPI 1659909000).
Provider details
- NPI number
- 1659909000
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Duloxetine Hcl | 25 |
| Hydroxyzine Hcl | 23 |
| Trazodone Hcl | 18 |
| Gabapentin | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-03-31
- Last updated
- 2024-07-10
- Certified
- 2024-07-10
Frequently asked questions
- What is Justin Nguyen's NPI number?
- Justin Nguyen's National Provider Identifier (NPI) is 1659909000, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Justin Nguyen's specialty?
- Justin Nguyen is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Justin Nguyen located?
- Justin Nguyen's practice location on file with NPPES is 147 N Brent St, Ventura, CA 93003-2809.
- What is Justin Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Justin Nguyen is (805) 948-5672.
- Does Justin Nguyen accept Medicare?
- Justin Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Justin Nguyen's NPI active?
- Yes — Justin Nguyen's NPI (1659909000) is active in the NPPES registry as of the last update on 2024-07-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.