Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Margaret Joy Byrnes, PHD
Clinical Psychologist in Lisle, IL · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1750393096
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Registry record
Entity type Individual (Type 1)
Name Dr. Margaret Joy Byrnes
Credential PHD
Sex Female
Practice address 5950 Lincoln Ave Unit W., Lisle, IL, 60532
Phone (630) 541-8930
Fax (630) 541-8940
Enumeration date Aug 13, 2006
Last updated in NPPES Jun 20, 2018
Taxonomy & licenses
103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 071-006427 (IL) Primary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers.
About the PHD 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.
Frequently asked questions
What is the NPI number for Margaret Byrnes?
The National Provider Identifier (NPI) for Margaret Byrnes is 1750393096, a Type 1 (individual) record in the CMS NPPES registry.
Where does Margaret Byrnes practice?
The practice location on file with NPPES is in Lisle, IL. Providers can have multiple locations; NPPES lists the primary practice address.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-06-20.