Mary O'Sullivan, LCSW
NPI 1417660168 · Clinical Social Worker · St Charles, IL
Mary O'Sullivan, LCSW is a Clinical Social Worker provider in St Charles, IL (NPI 1417660168).
Provider details
- NPI number
- 1417660168
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- 149.024800 (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
3 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
- 2022-12-27
- Last updated
- 2024-05-21
- Certified
- 2024-05-21
Frequently asked questions
- What is Mary O'Sullivan's NPI number?
- Mary O'Sullivan's National Provider Identifier (NPI) is 1417660168, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary O'Sullivan's specialty?
- Mary O'Sullivan is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mary O'Sullivan located?
- Mary O'Sullivan's practice location on file with NPPES is 905 Manley Rd, St Charles, IL 60174-5561.
- What is Mary O'Sullivan's phone number?
- The practice phone number listed in the NPPES registry for Mary O'Sullivan is (630) 624-9620.
- Is Mary O'Sullivan's NPI active?
- Yes — Mary O'Sullivan's NPI (1417660168) is active in the NPPES registry as of the last update on 2024-05-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.