Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Megan M Mastalerz
Physician Assistant in Elmhurst, IL · enumerated 2025.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1093695447
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Registry record
Entity type Individual (Type 1)
Name Megan M Mastalerz
Sex Female
Practice address 133 E Brush Hill Rd Ste 110, Elmhurst, IL, 60126
Phone (630) 545-7565
Enumeration date Sep 5, 2025
Last updated in NPPES Oct 17, 2025
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 085011185 (IL) Primary
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.
Frequently asked questions
Where does Megan Mastalerz practice?
The practice location on file with NPPES is in Elmhurst, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Megan Mastalerz?
The National Provider Identifier (NPI) for Megan Mastalerz is 1093695447, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Michael O'Toole Clinical Cardiac Electrophysiology Physician · Elmhurst, IL NPI 1225083462 Ashish Arora Gastroenterology Physician · Elmhurst, IL NPI 1336157171 Katrina Johnson Primary Care Nurse Practitioner · Elmhurst, IL NPI 1679664924 Viveka Boddipalli Pulmonary Disease Physician · Elmhurst, IL NPI 1225262934 Brett Collander Pulmonary Disease Physician · Elmhurst, IL NPI 1497088322 Asrar Ahmed Hospitalist Physician · Elmhurst, IL NPI 1407298334 Sara Partida Family Nurse Practitioner · Elmhurst, IL NPI 1285160622 Faith Almieri Nurse Practitioner · Elmhurst, IL NPI 1497511752
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-17.