Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Ari Holtz, PHD
Psychologist in Ellisville, MO · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1801968441
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Registry record
Entity type Individual (Type 1)
Name Dr. Ari Holtz
Credential PHD
Sex Male
Practice address 119 Clarkson Executive Park, Ellisville, MO, 63011
Phone (636) 256-0600
Fax (636) 256-0626
Enumeration date Nov 15, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
103T00000X Psychologist Behavioral Health & Social Service Providers · License 2006004002 (MO) 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
Where does Ari Holtz practice?
The practice location on file with NPPES is in Ellisville, MO. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Ari Holtz?
The National Provider Identifier (NPI) for Ari Holtz is 1801968441, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Jason Mathers Psychologist · Ellisville, MO NPI 1205914173 Karen Preusser Psychologist · Ellisville, MO NPI 1447321815 Laura Gunter Professional Counselor · Ellisville, MO NPI 1588735369 Judy Bronson Psychologist · Ellisville, MO NPI 1124176623 Jessica Fraser Clinical Social Worker · Ellisville, MO NPI 1255668380
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.