Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Harrison Nguyen, M.D.

Psychiatry Physician in Fairfax, VA · enumerated 2008 · practices at Harbor Counseling & Consultation.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1699938423

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Registry record

Entity type Individual (Type 1)

Name Dr. Harrison Nguyen

Credential M.D.

Sex Male

Practice address 9506b Lee Hwy, Fairfax, VA, 22031

Phone (571) 279-0409

Fax (703) 273-2038

Enumeration date Jul 2, 2008

Last updated in NPPES Nov 29, 2021

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License MD038552 (DC) Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License A101821 (CA) Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 0101248747 (VA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Harrison Nguyen practice?

The practice location on file with NPPES is in Fairfax, VA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Harrison Nguyen?

The National Provider Identifier (NPI) for Harrison Nguyen is 1699938423, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Theresa Courtillet Professional Counselor · Fairfax, VA NPI 1487604237 Suzin Arce Mental Health Counselor · Fairfax, VA NPI 1508968736 Karen Orem Professional Counselor · Fairfax, VA NPI 1265584585 Andrea Fata Mental Health Counselor · Fairfax, VA NPI 1174771216 Harbor Counseling & Consultation Mental Health Counselor · Fairfax, VA NPI 1396988739 Sheree Levitsky Clinical Social Worker · Fairfax, VA NPI 1255716734

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-11-29.