Mark Horwitz, LCSW CADC
NPI 1801985759 · Clinical Social Worker · Princeton, IL
Mark Horwitz, LCSW CADC is a Clinical Social Worker provider in Princeton, IL (NPI 1801985759).
Provider details
- NPI number
- 1801985759
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW CADC
- Sex
- Male
- Sole proprietor
- Yes
- License
- 16864 (IL)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
19 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
- 2006-10-11
- Last updated
- 2007-11-29
Frequently asked questions
- What is Mark Horwitz's NPI number?
- Mark Horwitz's National Provider Identifier (NPI) is 1801985759, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Horwitz's specialty?
- Mark Horwitz is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mark Horwitz located?
- Mark Horwitz's practice location on file with NPPES is 1405 N Main St, Princeton, IL 61356-9771.
- What is Mark Horwitz's phone number?
- The practice phone number listed in the NPPES registry for Mark Horwitz is (815) 872-2100.
- Is Mark Horwitz's NPI active?
- Yes — Mark Horwitz's NPI (1801985759) is active in the NPPES registry as of the last update on 2007-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.