Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sandra Efseaff, MPT

Physical Therapist in Mercer Island, WA · enumerated 2009.

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

National Provider Identifier

1184853871

Verified

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Registry record

Entity type Individual (Type 1)

Name Sandra Efseaff

Credential MPT

Sex Female

Practice address 7452 W Mercer Way, Mercer Island, WA, 98040

Phone (206) 230-0505

Enumeration date Jul 2, 2009

Last updated in NPPES Jul 2, 2009

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License PT00008989 (WA) Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1184853871 active?

Yes, as of the latest NPPES snapshot, NPI 1184853871 is active (record last updated 2009-07-02).

How do I verify Sandra Efseaff's NPI record?

Cross-check NPI 1184853871 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-07-02.