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

Mrs. Margaret Maria Sierantowicz, MD

Individual provider Pediatrics Physician · NPI 1275638215

Mrs. Margaret Maria Sierantowicz, MD is a Pediatrics Physician in South Barrington, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

8 Executive Ct Ste 1
South Barrington, IL 60010-9531
Phone: (847) 620-7969
Fax: (847) 620-7977
Show map & directions

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

Specialties & licences

Pediatrics Physician (primary) Taxonomy 208000000X · Licence 036076209 (IL)

Record details

NPI number1275638215
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedSeptember 14, 2006
Last updated in NPPESFebruary 22, 2014

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