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

Alexander Deussen, LCSW

Mental Health Counselor in Portland, OR · enumerated 2020 · practices at Willamette Family Counseling Center.

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

National Provider Identifier

1871100339

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Registry record

Entity type Individual (Type 1)

Name Alexander Deussen

Credential LCSW

Sex Male

Practice address Portland, OR, 97223

Phone (971) 404-5419

Enumeration date Sep 29, 2020

Last updated in NPPES Jun 30, 2026

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

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License L11190 (OR) Primary

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License L10313 (OR) Secondary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW 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 Alexander Deussen practice?

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

What is the NPI number for Alexander Deussen?

The National Provider Identifier (NPI) for Alexander Deussen is 1871100339, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Gregory Stilson Chiropractor · Portland, OR NPI 1265570741 Laura Ziemer Chiropractor · Portland, OR NPI 1629101209 Katherine Reed Social Worker · Portland, OR NPI 1427322270 Gudmund Lee Clinical Social Worker · Portland, OR NPI 1881954204 Willamette Family Counseling Center Mental Health Clinic/Center (Including Community Mental Health Center) · Portland, OR NPI 1164981379

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-30.