Marilyn Williams, MSW, LCSW
NPI 1689897688 · Clinical Social Worker · Fairfax, VA
Marilyn Williams, MSW, LCSW is a Clinical Social Worker provider in Fairfax, VA (NPI 1689897688).
Provider details
- NPI number
- 1689897688
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- MSW, LCSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- 0904001202 (VA)
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
19 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
- 2007-04-10
- Last updated
- 2007-07-08
Frequently asked questions
- What is Marilyn Williams's NPI number?
- Marilyn Williams's National Provider Identifier (NPI) is 1689897688, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marilyn Williams's specialty?
- Marilyn Williams is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Marilyn Williams located?
- Marilyn Williams's practice location on file with NPPES is 9870 Main St, Fairfax, VA 22031-3908.
- What is Marilyn Williams's phone number?
- The practice phone number listed in the NPPES registry for Marilyn Williams is (703) 591-9600.
- Is Marilyn Williams's NPI active?
- Yes — Marilyn Williams's NPI (1689897688) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.