Quick answers
- Does Justin N. Nguyen accept Medicare assignment?
- Yes. Medicare's clinician data says Justin N. Nguyen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Justin N. Nguyen's NPI number?
- 1659909000. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Justin N. Nguyen is enrolled with Medicare (CMS data updated October 2, 2026).
- 1911 Williams DrOxnard, CA 93036
- 300 Hillmont AveVentura, CA 93003
- 4080 Loma Vista Rd, Suite FVentura, CA 93003 (805) 667‑2841
- 852 W Ventura StFillmore, CA 93015 (805) 524‑2672
Group practices
Medicare enrollment lists Justin N. Nguyen as a member of these groups (CMS data updated October 2, 2026).
- County of Ventura344 clinicians in the group
- Community Memorial Health System185 clinicians in the group
- Community Physicians of Ventura County13 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Oxnard
Clinicians with the same Medicare primary specialty in Oxnard, CA — not a recommendation.
Other clinicians in County of Ventura
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Touro Un College Of Osteopathic Medicine, Vallejo |
| Graduation year | 2020 (6 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1659909000 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians