Holly Mareski, LCSW, CADC
NPI 1699233825 · Clinical Social Worker · Lombard, IL
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Holly Mareski, LCSW, CADC is a Clinical Social Worker provider in Lombard, IL (NPI 1699233825).
Provider details
- NPI number
- 1699233825
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW, CADC
- Sex
- Female
- Sole proprietor
- Yes
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
7 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
- 2019-03-06
- Last updated
- 2019-03-06
Frequently asked questions
- What is Holly Mareski's NPI number?
- Holly Mareski's National Provider Identifier (NPI) is 1699233825, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Holly Mareski's specialty?
- Holly Mareski is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Holly Mareski located?
- Holly Mareski's practice location on file with NPPES is 450 E 22nd St Ste 150, Lombard, IL 60148-6118.
- What is Holly Mareski's phone number?
- The practice phone number listed in the NPPES registry for Holly Mareski is (630) 930-3477.
- Does Holly Mareski accept Medicare?
- Holly Mareski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Holly Mareski's NPI active?
- Yes — Holly Mareski's NPI (1699233825) is active in the NPPES registry as of the last update on 2019-03-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.