Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Rebecca Mass-Krajewski

Family Nurse Practitioner in Redmond, WA · enumerated 2014.

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

National Provider Identifier

1174931042

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Registry record

Entity type Individual (Type 1)

Name Rebecca Mass-Krajewski

Sex Female

Practice address 16329 Ne 80th St, Redmond, WA, 98052

Phone (425) 610-8030

Enumeration date Jul 23, 2014

Last updated in NPPES Feb 18, 2024

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License RN60099600 (WA) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP60492406 (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

What is the NPI number for Rebecca Mass-Krajewski?

The National Provider Identifier (NPI) for Rebecca Mass-Krajewski is 1174931042, a Type 1 (individual) record in the CMS NPPES registry.

Where does Rebecca Mass-Krajewski practice?

The practice location on file with NPPES is in Redmond, WA. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-02-18.