IndividualActive
Gregory Williams, LCSW
NPI 1275158099 · Clinical Social Worker · Chicago, IL
Gregory Williams, LCSW is a Clinical Social Worker provider in Chicago, IL (NPI 1275158099).
Provider details
- NPI number
- 1275158099
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- 149.011556 (IL)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(64/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 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
2260 N Elston Ave
Chicago, IL 60614-2930
Phone: (773) 772-2450
Street-level locationGet directions
Mailing address
736 Countryside Dr
Bolingbrook, IL 60490-5458
Registry dates
- Enumerated
- 2020-06-09
- Last updated
- 2020-06-09
- Certified
- 2020-06-09
Frequently asked questions
- What is Gregory Williams's NPI number?
- Gregory Williams's National Provider Identifier (NPI) is 1275158099, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Williams's specialty?
- Gregory Williams is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Gregory Williams located?
- Gregory Williams's practice location on file with NPPES is 2260 N Elston Ave, Chicago, IL 60614-2930.
- What is Gregory Williams's phone number?
- The practice phone number listed in the NPPES registry for Gregory Williams is (773) 772-2450.
- Is Gregory Williams's NPI active?
- Yes — Gregory Williams's NPI (1275158099) is active in the NPPES registry as of the last update on 2020-06-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.