Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Kathryn Brennan
Registered Nurse in Mchenry, IL · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1609997360
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Registry record
Entity type Individual (Type 1)
Name Kathryn Brennan
Sex Female
Practice address 4100 Veterans Parkway, Mchenry, IL, 60050
Phone (815) 385-6400
Enumeration date Apr 2, 2007
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
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 Kathryn Brennan?
The National Provider Identifier (NPI) for Kathryn Brennan is 1609997360, a Type 1 (individual) record in the CMS NPPES registry.
Where does Kathryn Brennan practice?
The practice location on file with NPPES is in Mchenry, IL. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Steven Torrez Addiction (Substance Use Disorder) Counselor · Mchenry, IL NPI 1497809271 Robin Gardner Counselor · Mchenry, IL NPI 1427190438 Family Service and Community Mental Health Center for Mchenry County Community/Behavioral Health Agency · Mchenry, IL NPI 1366584369 Laura Savage Addiction (Substance Use Disorder) Counselor · Mchenry, IL NPI 1629110630 James Keller Counselor · Mchenry, IL NPI 1073655080 Judy Carlson Clinical Social Worker · Mchenry, IL NPI 1265574123 Daniel Malone Clinical Social Worker · Mchenry, IL NPI 1275650525 Laura Devries Clinical Social Worker · Mchenry, IL NPI 1013034339
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.