Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
John Ewing Harris, PHD
Psychologist in Springfield, IL · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1558359828
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Registry record
Entity type Individual (Type 1)
Name John Ewing Harris
Credential PHD
Sex Male
Practice address 2921 Greenbriar Dr Ste B1, Springfield, IL, 62704
Phone (217) 546-3118
Fax (217) 546-3184
Enumeration date Oct 11, 2005
Last updated in NPPES Feb 14, 2021
Taxonomy & licenses
103T00000X Psychologist Behavioral Health & Social Service Providers · License 071005273 (IL) 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
What is the NPI number for John Harris?
The National Provider Identifier (NPI) for John Harris is 1558359828, a Type 1 (individual) record in the CMS NPPES registry.
Where does John Harris practice?
The practice location on file with NPPES is in Springfield, IL. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-02-14.