Mark Brown, LCSW
NPI 1366650475 · Clinical Social Worker · Northfield, IL
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Brown, LCSW is a Clinical Social Worker provider in Northfield, IL (NPI 1366650475).
Provider details
- NPI number
- 1366650475
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- Yes
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
83% 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
- 2007-05-21
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Brown's NPI number?
- Mark Brown's National Provider Identifier (NPI) is 1366650475, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Brown's specialty?
- Mark Brown is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mark Brown located?
- Mark Brown's practice location on file with NPPES is 466 Central Ave, Northfield, IL 60093-3041.
- What is Mark Brown's phone number?
- The practice phone number listed in the NPPES registry for Mark Brown is (847) 414-5425.
- Does Mark Brown accept Medicare?
- Mark Brown is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Brown's NPI active?
- Yes — Mark Brown's NPI (1366650475) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.