Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mark Siekierski

Individual provider Clinical Social Worker · NPI 1043938707

Mark Siekierski is a Clinical Social Worker in Batavia, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
In the registry since
2022

Practice location Address checks out

201 Houston St
Batavia, IL 60510-1960
Phone: (847) 306-5461
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 149.010728 (IL)

Record details

NPI number1043938707
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedAugust 18, 2022
Last updated in NPPESAugust 18, 2022
Certification dateAugust 18, 2022
Mailing address671 Blackhawk Dr, Batavia, IL 60510-1198

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