Melissa Williams, LMSW
NPI 1649886607 · Clinical Social Worker · Mattawan, MI
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Melissa Williams, LMSW is a Clinical Social Worker provider in Mattawan, MI (NPI 1649886607).
Provider details
- NPI number
- 1649886607
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LMSW
- Sex
- Female
- Sole proprietor
- No
- License
- 6801092703 (MI)
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
5 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
- 2020-09-16
- Last updated
- 2025-07-10
- Certified
- 2025-07-10
Frequently asked questions
- What is Melissa Williams's NPI number?
- Melissa Williams's National Provider Identifier (NPI) is 1649886607, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Melissa Williams's specialty?
- Melissa Williams is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Melissa Williams located?
- Melissa Williams's practice location on file with NPPES is 41221 Chickadee St, Mattawan, MI 49071-9789.
- What is Melissa Williams's phone number?
- The practice phone number listed in the NPPES registry for Melissa Williams is (269) 341-8888.
- Does Melissa Williams accept Medicare?
- Melissa Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Melissa Williams's NPI active?
- Yes — Melissa Williams's NPI (1649886607) is active in the NPPES registry as of the last update on 2025-07-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.