Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Theresa Ann Williams, LCSW
Social Worker in Hillsboro, OR · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1831482538
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Registry record
Entity type Individual (Type 1)
Name Theresa Ann Williams
Credential LCSW
Sex Female
Practice address 494 Se Washington St., Hillsboro, OR, 97123
Phone (503) 726-3824
Fax (503) 726-3825
Enumeration date May 27, 2011
Last updated in NPPES May 14, 2013
Taxonomy & licenses
LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy.
About the LCSW 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
How do I verify Theresa Williams's NPI record?
Cross-check NPI 1831482538 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1831482538 active?
Yes, as of the latest NPPES snapshot, NPI 1831482538 is active (record last updated 2013-05-14).
Other providers at this practice address
Browse all → Katrina De Boer Mental Health Counselor · Hillsboro, OR NPI 1801930011 Katelyn Fraley Counselor · Hillsboro, OR NPI 1790078939 Samantha Dambrosio Community/Behavioral Health Agency · Hillsboro, OR NPI 1992098941 Cassaundra Batchelor Mental Health Counselor · Hillsboro, OR NPI 1831484542 Jeff Chadsey Mental Health Counselor · Hillsboro, OR NPI 1477833242 Hannah Sawitsky Ristorcelli Mental Health Counselor · Hillsboro, OR NPI 1851769772
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-05-14.