Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Kathleen Callahan, PA-C
Physician Assistant in Phoenix, AZ · enumerated 2019.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1033766902
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Registry record
Entity type Individual (Type 1)
Name Kathleen Callahan
Credential PA-C
Sex Female
Practice address 2836 E Indian School Rd Ste A8, Phoenix, AZ, 85016
Phone (602) 840-0056
Enumeration date Aug 24, 2019
Last updated in NPPES Oct 28, 2025
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 8808 (AZ) 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
What specialty is Kathleen Callahan?
Kathleen Callahan is registered in NPPES with the primary taxonomy of Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-28.