IndividualActive
Jonathan Williamsen
NPI 1356730360 · Clinical Social Worker · Bellevue, WA
Jonathan Williamsen is a Clinical Social Worker provider in Bellevue, WA (NPI 1356730360).
Provider details
- NPI number
- 1356730360
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(68/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
83% 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.
Practice location
14270 Ne 21st St
Bellevue, WA 98007-3720
Phone: (254) 653-5000
Street-level locationGet directions
Mailing address
6400 Southcenter Blvd
Tukwila, WA 98188-2547
Registry dates
- Enumerated
- 2015-01-14
- Last updated
- 2018-12-03
Frequently asked questions
- What is Jonathan Williamsen's NPI number?
- Jonathan Williamsen's National Provider Identifier (NPI) is 1356730360, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Williamsen's specialty?
- Jonathan Williamsen is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Jonathan Williamsen located?
- Jonathan Williamsen's practice location on file with NPPES is 14270 Ne 21st St, Bellevue, WA 98007-3720.
- What is Jonathan Williamsen's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Williamsen is (254) 653-5000.
- Is Jonathan Williamsen's NPI active?
- Yes — Jonathan Williamsen's NPI (1356730360) is active in the NPPES registry as of the last update on 2018-12-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.