Jessica Siwak, LCSW
NPI 1477828713 · Clinical Social Worker · Pontiac, IL
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jessica Siwak, LCSW is a Clinical Social Worker provider in Pontiac, IL (NPI 1477828713).
Provider details
- NPI number
- 1477828713
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
- License
- 149.015177 (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
14 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
- 2012-03-20
- Last updated
- 2024-06-27
- Certified
- 2024-06-27
Frequently asked questions
- What is Jessica Siwak's NPI number?
- Jessica Siwak's National Provider Identifier (NPI) is 1477828713, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jessica Siwak's specialty?
- Jessica Siwak is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Jessica Siwak located?
- Jessica Siwak's practice location on file with NPPES is 920 W Custer Ave, Pontiac, IL 61764-1067.
- What is Jessica Siwak's phone number?
- The practice phone number listed in the NPPES registry for Jessica Siwak is (815) 844-6109.
- Does Jessica Siwak accept Medicare?
- Jessica Siwak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jessica Siwak's NPI active?
- Yes — Jessica Siwak's NPI (1477828713) is active in the NPPES registry as of the last update on 2024-06-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.