Harrison Nguyen, M.D.
NPI 1699938423 · Psychiatry Physician · Fairfax, VA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Harrison Nguyen, M.D. is a Psychiatry Physician provider in Fairfax, VA (NPI 1699938423).
Provider details
- NPI number
- 1699938423
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD038552 (DC)
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
17 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 · 34 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 130 | 47 |
| Buspirone Hcl | 92 | 43 |
| Lorazepam | 87 | 24 |
| Quetiapine Fumarate | 86 | 21 |
| Mirtazapine | 83 | 33 |
| Sertraline Hcl | 83 | 31 |
| Fluoxetine Hcl | 71 | 26 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-07-02
- Last updated
- 2021-11-29
Frequently asked questions
- What is Harrison Nguyen's NPI number?
- Harrison Nguyen's National Provider Identifier (NPI) is 1699938423, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harrison Nguyen's specialty?
- Harrison Nguyen is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Harrison Nguyen located?
- Harrison Nguyen's practice location on file with NPPES is 9506b Lee Hwy, Fairfax, VA 22031-2303.
- What is Harrison Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Harrison Nguyen is (571) 279-0409.
- Does Harrison Nguyen accept Medicare?
- Harrison Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Harrison Nguyen's NPI active?
- Yes — Harrison Nguyen's NPI (1699938423) is active in the NPPES registry as of the last update on 2021-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.