Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Alexander Tan, N.D.

Psychiatric/Mental Health Nurse Practitioner in Seattle, WA · enumerated 2007.

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

National Provider Identifier

1306992698

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Alexander Tan

Credential N.D.

Sex Male

Practice address Seattle, WA, 98107

Phone (206) 880-0611

Fax (206) 672-3366

Enumeration date Jan 27, 2007

Last updated in NPPES Feb 2, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

175F00000X Naturopath Other Service Providers · License 212 (CA) Secondary

175F00000X Naturopath Other Service Providers · License NT00001528 (WA) Secondary

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP61279914 (WA) Primary

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

What specialty is Alexander Tan?

Alexander Tan is registered in NPPES with the primary taxonomy of Psychiatric/Mental Health Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Sikirat Tinubu-Karch Geriatric Medicine (Family Medicine) Physician · Seattle, WA NPI 1992733638 Daniel Wartenberg Clinical Psychologist · Seattle, WA NPI 1194855858 Courtney Tallman Mental Health Counselor · Seattle, WA NPI 1982726980 Hayden Hamilton Hospice and Palliative Medicine (Physical Medicine & Rehabilitation) Physician · Seattle, WA NPI 1295990216 Nicole Hamlin Medical Physician Assistant · Seattle, WA NPI 1760636435 Stephanie Littell Mental Health Counselor · Seattle, WA NPI 1972739951 Autumn Hinds Mental Health Counselor · Seattle, WA NPI 1962710020 Shannon Albert Clinical Psychologist · Seattle, WA NPI 1891074159

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-02.