Mellissa Williams
NPI 1447700380 · Clinical Social Worker · Crescent City, CA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mellissa Williams is a Clinical Social Worker provider in Crescent City, CA (NPI 1447700380).
Provider details
- NPI number
- 1447700380
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- Yes
- License
- LCSW122811 (CA)
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
9 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
- 2016-10-04
- Last updated
- 2024-05-30
- Certified
- 2024-05-30
Frequently asked questions
- What is Mellissa Williams's NPI number?
- Mellissa Williams's National Provider Identifier (NPI) is 1447700380, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mellissa Williams's specialty?
- Mellissa Williams is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mellissa Williams located?
- Mellissa Williams's practice location on file with NPPES is 1403 Inyo St Apt 151, Crescent City, CA 95531-2154.
- What is Mellissa Williams's phone number?
- The practice phone number listed in the NPPES registry for Mellissa Williams is (707) 954-7626.
- Does Mellissa Williams accept Medicare?
- Mellissa Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mellissa Williams's NPI active?
- Yes — Mellissa Williams's NPI (1447700380) is active in the NPPES registry as of the last update on 2024-05-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.