MR. JONATHAN MICHAEL WILLIAMSEN II
NPI 1356730360
Social Worker - Clinical in Bellevue, WA

Active since January 14, 2015
14270 NE 21ST ST, BELLEVUE, WA 98007(254) 653-5000 Get Directions Write a Review

NPPES record last updated: December 3, 2018. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Dec 3, 2018, Jun 22, 2016 (2 updates tracked since 2016).

About Mr. Jonathan Michael Williamsen Ii NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. JONATHAN MICHAEL WILLIAMSEN II (NPI 1356730360) is an individual clinical provider in Bellevue, Washington and active in the NPI registry since January 2015.

NPPES Registry Identity

NPI1356730360
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameMR. JONATHAN MICHAEL WILLIAMSEN II
Location Address14270 NE 21ST STBellevue, WA 98007-3720
Mailing Address6400 Southcenter BlvdTukwila, WA 98188-2547 · (206) 901-2000
Sole ProprietorNo
Enumeration DateJanuary 14, 2015
Last NPPES UpdateDecember 3, 20182 updates tracked since enumeration
NPI 1356730360 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
14270 NE 21ST ST, Bellevue, WA 98007

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Student in an Organized Health Care Education/Training Program
14270 NE 21ST ST, SOUND MENTAL HEALTH - RAINBOW CREEK
BELLEVUE, WA 98007
Counselor (Professional)
14270 NE 21ST ST
BELLEVUE, WA 98007
Social Worker (Clinical)
14270 NE 21ST ST
BELLEVUE, WA 98007
Student in an Organized Health Care Education/Training Program
14270 NE 21ST ST
BELLEVUE, WA 98007
Counselor
14270 NE 21ST ST
BELLEVUE, WA 98007
Counselor (Mental Health)
14270 NE 21ST ST
BELLEVUE, WA 98007
Student in an Organized Health Care Education/Training Program
14270 NE 21ST ST, SOUND MENTAL HEALTH - RAINBOW CREEK OFFICE
BELLEVUE, WA 98007
Counselor (Mental Health)
14270 NE 21ST ST
BELLEVUE, WA 98007

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Jonathan Williamsen's NPI number?

The NPI number for Jonathan Williamsen is 1356730360. It was assigned to this individual provider in the NPPES registry on January 14, 2015.

Where is Jonathan Williamsen located?

Jonathan Williamsen practices at 14270 NE 21st St, Bellevue, WA 98007. The listed phone number is (254) 653-5000.

What is Jonathan Williamsen's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

When was this NPI record last updated?

The NPPES record for Jonathan Williamsen was last updated on December 3, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.