Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Stephanie Jo Ann Johnson, PSY.D.
Clinical Psychologist in Ione, CA · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1588944813
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Registry record
Entity type Individual (Type 1)
Name Dr. Stephanie Jo Ann Johnson
Credential PSY.D.
Sex Female
Practice address 4001 State Highway 104, Ione, CA, 95640
Phone (209) 274-4911
Enumeration date Aug 17, 2011
Last updated in NPPES Jul 22, 2022
Taxonomy & licenses
103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY29508 (CA) Primary
PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice.
About the PSYD 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 Stephanie Johnson practice?
The practice location on file with NPPES is in Ione, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Stephanie Johnson?
The National Provider Identifier (NPI) for Stephanie Johnson is 1588944813, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-22.