Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Lynn Hackstaff, LICSW

Clinical Social Worker in Mountlake Terrace, WA · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1033313184

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Registry record

Entity type Individual (Type 1)

Name Lynn Hackstaff

Credential LICSW

Sex Female

Practice address Mountlake Terrace, WA, 98043

Phone (425) 640-7009

Enumeration date Jun 13, 2007

Last updated in NPPES Jul 30, 2021

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License LCS11925 (CA) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LW60995388 (WA) Primary

Other identifiers

Identifier	Type	State	Issuer
60995388	Other	WA	INDEPENDENT CLINICAL SOCIAL WORKER LICENSE

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.

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Frequently asked questions

How do I verify Lynn Hackstaff's NPI record?

Cross-check NPI 1033313184 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1033313184 active?

Yes, as of the latest NPPES snapshot, NPI 1033313184 is active (record last updated 2021-07-30).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-30.