Mark Hasselman, LCSW
NPI 1255462024 · Clinical Social Worker · West Dundee, IL
Mark Hasselman, LCSW is a Clinical Social Worker provider in West Dundee, IL (NPI 1255462024).
Provider details
- NPI number
- 1255462024
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- No
- License
- 149006334 (IL)
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
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
- 2007-03-07
- Last updated
- 2008-08-07
Frequently asked questions
- What is Mark Hasselman's NPI number?
- Mark Hasselman's National Provider Identifier (NPI) is 1255462024, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Hasselman's specialty?
- Mark Hasselman is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mark Hasselman located?
- Mark Hasselman's practice location on file with NPPES is 745 S 8th St, West Dundee, IL 60118-2108.
- What is Mark Hasselman's phone number?
- The practice phone number listed in the NPPES registry for Mark Hasselman is (800) 428-7260.
- Is Mark Hasselman's NPI active?
- Yes — Mark Hasselman's NPI (1255462024) is active in the NPPES registry as of the last update on 2008-08-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.