Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Cathryn Glanton Holzhauer, PH.D.
Psychologist in Leeds, MA · enumerated 2017.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1154840668
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Registry record
Entity type Individual (Type 1)
Name Dr. Cathryn Glanton Holzhauer
Credential PH.D.
Sex Female
Practice address 421 N Main St, Leeds, MA, 01053
Phone (413) 584-4040
Enumeration date Sep 15, 2017
Last updated in NPPES Jun 17, 2026
Taxonomy & licenses
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 specialty is Cathryn Holzhauer?
Cathryn Holzhauer is registered in NPPES with the primary taxonomy of Psychologist. 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.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-17.