Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Diane Gail Brennan, PSYD
School Psychologist in Mesa, AZ · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1861547820
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Registry record
Entity type Individual (Type 1)
Name Dr. Diane Gail Brennan
Credential PSYD
Sex Female
Practice address 8045 E Portobello Ave, Mesa, AZ, 85212
Phone (480) 507-1404
Fax (480) 507-1666
Enumeration date Jan 23, 2007
Last updated in NPPES Jul 26, 2007
Taxonomy & licenses
PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice.
About the PSYD 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
How do I verify Diane Brennan's NPI record?
Cross-check NPI 1861547820 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1861547820 active?
Yes, as of the latest NPPES snapshot, NPI 1861547820 is active (record last updated 2007-07-26).
Other providers at this practice address
Browse all → Janis Dawn Speech-Language Pathologist · Mesa, AZ NPI 1679645253 Donna Sheely School Registered Nurse · Mesa, AZ NPI 1760530414 Shannon Banuelos School Counselor · Mesa, AZ NPI 1558406165 Jane Xavier School Registered Nurse · Mesa, AZ NPI 1164697744 Cynthia Miller Speech-Language Pathologist · Mesa, AZ NPI 1245563188 Cherise Courtright Registered Nurse · Mesa, AZ NPI 1225791643 Anabel Bogdan School Registered Nurse · Mesa, AZ NPI 1194553545
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-26.