Long Nguyen, M.D.
NPI 1619138468 · Psychiatry Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Long Nguyen, M.D. is a Psychiatry Physician provider in San Diego, CA (NPI 1619138468).
Provider details
- NPI number
- 1619138468
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 251565 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
100% 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 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Buprenorphine Hcl/Naloxone Hclbrand: Buprenorphine-Naloxone | 92 | 16 |
| Buspirone Hcl | 36 | — |
| Trazodone Hcl | 32 | — |
| Gabapentin | 19 | — |
| Duloxetine Hcl | 18 | — |
| Lamotrigine | 18 | — |
| Mirtazapine | 16 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-06-24
- Last updated
- 2022-05-19
- Certified
- 2022-05-19
Frequently asked questions
- What is Long Nguyen's NPI number?
- Long Nguyen's National Provider Identifier (NPI) is 1619138468, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Long Nguyen's specialty?
- Long Nguyen is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Long Nguyen located?
- Long Nguyen's practice location on file with NPPES is 3420 Kenyon St, San Diego, CA 92110-5001.
- What is Long Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Long Nguyen is (619) 221-6550.
- Does Long Nguyen accept Medicare?
- Long Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Long Nguyen's NPI active?
- Yes — Long Nguyen's NPI (1619138468) is active in the NPPES registry as of the last update on 2022-05-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.