Mary Costello, LCSW
NPI 1639372204 · Clinical Social Worker · Chicago, IL
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Costello, LCSW is a Clinical Social Worker provider in Chicago, IL (NPI 1639372204).
Provider details
- NPI number
- 1639372204
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- 149-009666 (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
2 documented practice locations
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
Additional practice locations (1)
- 5209 N Clark StSuite 2aChicago, IL 60640-2101Phone: (773) 506-1401
Registry dates
- Enumerated
- 2007-06-08
- Last updated
- 2018-12-05
Frequently asked questions
- What is Mary Costello's NPI number?
- Mary Costello's National Provider Identifier (NPI) is 1639372204, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Costello's specialty?
- Mary Costello is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mary Costello located?
- Mary Costello's practice location on file with NPPES is 5317 N Clark St Fl 2, Chicago, IL 60640.
- What is Mary Costello's phone number?
- The practice phone number listed in the NPPES registry for Mary Costello is (773) 506-1401.
- Does Mary Costello accept Medicare?
- Mary Costello is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Costello's NPI active?
- Yes — Mary Costello's NPI (1639372204) is active in the NPPES registry as of the last update on 2018-12-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.