IndividualActive
Mark Siekierski
NPI 1043938707 · Clinical Social Worker · Batavia, IL
Mark Siekierski is a Clinical Social Worker provider in Batavia, IL (NPI 1043938707).
Provider details
- NPI number
- 1043938707
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- 149.010728 (IL)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(60/100 index)
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
201 Houston St
Batavia, IL 60510-1960
Phone: (847) 306-5461
Street-level locationGet directions
Mailing address
671 Blackhawk Dr
Batavia, IL 60510-1198
Registry dates
- Enumerated
- 2022-08-18
- Last updated
- 2022-08-18
- Certified
- 2022-08-18
Frequently asked questions
- What is Mark Siekierski's NPI number?
- Mark Siekierski's National Provider Identifier (NPI) is 1043938707, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Siekierski's specialty?
- Mark Siekierski is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mark Siekierski located?
- Mark Siekierski's practice location on file with NPPES is 201 Houston St, Batavia, IL 60510-1960.
- What is Mark Siekierski's phone number?
- The practice phone number listed in the NPPES registry for Mark Siekierski is (847) 306-5461.
- Is Mark Siekierski's NPI active?
- Yes — Mark Siekierski's NPI (1043938707) is active in the NPPES registry as of the last update on 2022-08-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.