Margaret Sierantowicz, MD
NPI 1275638215 · Pediatrics Physician · South Barrington, IL
Margaret Sierantowicz, MD is a Pediatrics Physician provider in South Barrington, IL (NPI 1275638215).
Provider details
- NPI number
- 1275638215
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 036076209 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
- 2006-09-14
- Last updated
- 2014-02-22
Frequently asked questions
- What is Margaret Sierantowicz's NPI number?
- Margaret Sierantowicz's National Provider Identifier (NPI) is 1275638215, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Sierantowicz's specialty?
- Margaret Sierantowicz is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Sierantowicz located?
- Margaret Sierantowicz's practice location on file with NPPES is 8 Executive Ct, South Barrington, IL 60010-9531.
- What is Margaret Sierantowicz's phone number?
- The practice phone number listed in the NPPES registry for Margaret Sierantowicz is (847) 620-7969.
- Is Margaret Sierantowicz's NPI active?
- Yes — Margaret Sierantowicz's NPI (1275638215) is active in the NPPES registry as of the last update on 2014-02-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.