Marilyn Williamson
NPI 1164768032 · Social Worker · Chelan, WA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marilyn Williamson is a Social Worker provider in Chelan, WA (NPI 1164768032).
Provider details
- NPI number
- 1164768032
- Entity type
- Individual
- Primary specialty
- Social WorkerBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- No
- License
- LW00007692 (WA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
13 yrs in NPPES registry
- Profile completeness38% of score
100% 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
Mailing address
Registry dates
- Enumerated
- 2012-12-21
- Last updated
- 2012-12-21
Frequently asked questions
- What is Marilyn Williamson's NPI number?
- Marilyn Williamson's National Provider Identifier (NPI) is 1164768032, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marilyn Williamson's specialty?
- Marilyn Williamson is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).
- Where is Marilyn Williamson located?
- Marilyn Williamson's practice location on file with NPPES is 503 E Highland Ave, Chelan, WA 98816-8631.
- What is Marilyn Williamson's phone number?
- The practice phone number listed in the NPPES registry for Marilyn Williamson is (509) 682-8517.
- Does Marilyn Williamson accept Medicare?
- Marilyn Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marilyn Williamson's NPI active?
- Yes — Marilyn Williamson's NPI (1164768032) is active in the NPPES registry as of the last update on 2012-12-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.