IndividualActive
Mary Liddle, LCSW
NPI 1649327974 · Clinical Social Worker · Ottawa, IL
Mary Liddle, LCSW is a Clinical Social Worker provider in Ottawa, IL (NPI 1649327974).
Provider details
- NPI number
- 1649327974
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(83/100 index)
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
727 Etna Road
Ottawa, IL 61354
Phone: (815) 434-4727
Fax: (815) 434-0271
Street-level locationGet directions
Mailing address
Po Box 1488
La Salle, IL 61301-3488
Registry dates
- Enumerated
- 2007-01-05
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mary Liddle's NPI number?
- Mary Liddle's National Provider Identifier (NPI) is 1649327974, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Liddle's specialty?
- Mary Liddle is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mary Liddle located?
- Mary Liddle's practice location on file with NPPES is 727 Etna Road, Ottawa, IL 61354.
- What is Mary Liddle's phone number?
- The practice phone number listed in the NPPES registry for Mary Liddle is (815) 434-4727.
- Is Mary Liddle's NPI active?
- Yes — Mary Liddle's NPI (1649327974) 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.