IndividualActive
John Williams
NPI 1649533829 · Clinical Social Worker · Chicago, IL
John Williams is a Clinical Social Worker provider in Chicago, IL (NPI 1649533829).
Provider details
- NPI number
- 1649533829
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- 149.015250 (IL)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(79/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 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
5209 N Clark St
2nd Floor
Chicago, IL 60640-2101
Phone: (773) 575-1792
Street-level locationGet directions
Mailing address
5415 N Sheridan Rd
Chicago, IL 60640-1954
Registry dates
- Enumerated
- 2012-06-21
- Last updated
- 2012-06-21
Frequently asked questions
- What is John Williams's NPI number?
- John Williams's National Provider Identifier (NPI) is 1649533829, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Williams's specialty?
- John Williams is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is John Williams located?
- John Williams's practice location on file with NPPES is 5209 N Clark St, Chicago, IL 60640-2101.
- What is John Williams's phone number?
- The practice phone number listed in the NPPES registry for John Williams is (773) 575-1792.
- Is John Williams's NPI active?
- Yes — John Williams's NPI (1649533829) is active in the NPPES registry as of the last update on 2012-06-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.