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Dr. Maria J Janecek, D.O.

Pediatrics Physician in Downers Grove, IL · enumerated 2006 · practices at Downers Grove Pediatrics Ltd.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1396826400

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Registry record

Entity type Individual (Type 1)
Name Dr. Maria J Janecek
Credential D.O.
Sex Female
Practice address 6840 S. Main Street, Suite 201, Downers Grove, IL, 60516
Phone (630) 852-4551
Fax (630) 852-0131
Enumeration date Oct 17, 2006
Last updated in NPPES Nov 17, 2009

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 036-103654 (IL) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

How do I verify Maria Janecek's NPI record?
Cross-check NPI 1396826400 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1396826400 active?
Yes, as of the latest NPPES snapshot, NPI 1396826400 is active (record last updated 2009-11-17).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-11-17.