Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Karen Jean Preusser, PHD
Psychologist in Ellisville, MO · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1447321815
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Registry record
Entity type Individual (Type 1)
Name Ms. Karen Jean Preusser
Credential PHD
Sex Female
Practice address 119 Clarkson Executive Park, Ellisville, MO, 63011
Phone (636) 256-0600
Fax (636) 256-0626
Enumeration date Nov 10, 2006
Last updated in NPPES Jul 8, 2007
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
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.
What specialty is Karen Preusser?
Karen Preusser 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.
Other providers at this practice address
Browse all → Jason Mathers Psychologist · Ellisville, MO NPI 1205914173 Laura Gunter Professional Counselor · Ellisville, MO NPI 1588735369 Ari Holtz Psychologist · Ellisville, MO NPI 1801968441 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.