IndividualActive
Leslie Marcus, LCSW
NPI 1720934300 · Clinical Social Worker · Rockford, IL
Leslie Marcus, LCSW is a Clinical Social Worker provider in Rockford, IL (NPI 1720934300).
Provider details
- NPI number
- 1720934300
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
- License
- 149.031443 (IL)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(53/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in 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
1601 University Dr
Rockford, IL 61107-5317
Phone: (815) 387-2521
Street-level locationGet directions
Mailing address
1724 Mole Ave
Janesville, WI 53548-1533
Registry dates
- Enumerated
- 2026-03-06
- Last updated
- 2026-03-06
- Certified
- 2026-03-06
Frequently asked questions
- What is Leslie Marcus's NPI number?
- Leslie Marcus's National Provider Identifier (NPI) is 1720934300, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leslie Marcus's specialty?
- Leslie Marcus is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Leslie Marcus located?
- Leslie Marcus's practice location on file with NPPES is 1601 University Dr, Rockford, IL 61107-5317.
- What is Leslie Marcus's phone number?
- The practice phone number listed in the NPPES registry for Leslie Marcus is (815) 387-2521.
- Is Leslie Marcus's NPI active?
- Yes — Leslie Marcus's NPI (1720934300) is active in the NPPES registry as of the last update on 2026-03-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.