Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Joann Tso I, MSW, LSAA
Counselor in Ft. Defiance, AZ · enumerated 2019.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1770145567
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Registry record
Entity type Individual (Type 1)
Name Joann Tso I
Credential MSW, LSAA
Sex Female
Practice address 1/4 Mile Ne of Ft. Defiance Fieldhouse, Ft. Defiance, AZ, 86504
Phone (928) 729-4012
Fax (928) 729-4200
Enumeration date Jul 2, 2019
Last updated in NPPES Jul 2, 2019
Taxonomy & licenses
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 Joann Tso practice?
The practice location on file with NPPES is in Ft. Defiance, AZ. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Joann Tso?
The National Provider Identifier (NPI) for Joann Tso is 1770145567, a Type 1 (individual) record in the CMS NPPES registry.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-07-02.