Leslie Duff Therapy PLLC
NPI 1245983394 · Clinical Social Worker · Glen Ellyn, IL
Leslie Duff Therapy PLLC is a Clinical Social Worker organization in Glen Ellyn, IL (NPI 1245983394).
Provider details
- NPI number
- 1245983394
- Entity type
- Organization
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Parent organization
- Leslie Duff Therapy PLLC
- Organization subpart
- Yes
- Authorized official
- Leslie Duff, Therapist(847) 845-5698
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
4 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
Other names (DBA / former)
- Doing business as
- Blue Bird Therapy
Registry dates
- Enumerated
- 2022-01-29
- Last updated
- 2022-01-29
- Certified
- 2022-01-29
Frequently asked questions
- What is Leslie Duff Therapy PLLC's NPI number?
- Leslie Duff Therapy PLLC's National Provider Identifier (NPI) is 1245983394, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Leslie Duff Therapy PLLC?
- Leslie Duff Therapy PLLC is classified in the NPPES registry as Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Leslie Duff Therapy PLLC located?
- Leslie Duff Therapy PLLC's practice location on file with NPPES is 488 N Main St Apt 2n, Glen Ellyn, IL 60137-5126.
- What is Leslie Duff Therapy PLLC's phone number?
- The practice phone number listed in the NPPES registry for Leslie Duff Therapy PLLC is (847) 845-5698.
- Who is the authorized official for Leslie Duff Therapy PLLC?
- The authorized official listed on Leslie Duff Therapy PLLC's NPPES record is Leslie Duff, Therapist. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Leslie Duff Therapy PLLC's NPI active?
- Yes — Leslie Duff Therapy PLLC's NPI (1245983394) is active in the NPPES registry as of the last update on 2022-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.