Ewa Witkowska

Ewa Witkowska is a Speech-Language Pathologist provider (Speech-Language Pathologist) practicing in Sunnyvale, CA, registered in the NPPES registry with NPI 1457789729 since 2013.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1457789729
Entity type	Individual (Type 1)
Name	Ewa Witkowska
Sex	Female
Practice address	Sunnyvale, CA, 94089
Phone	6504928025
Enumeration date	2013-10-24
Last updated in NPPES	2013-10-24

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

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
235Z00000X	Speech-Language Pathologist	Primary	14031437	CA
235Z00000X	Speech-Language Pathologist	Secondary	7986	CA

Copy-ready billing details

Provider: Ewa Witkowska
NPI: 1457789729
Taxonomy: 235Z00000X (Speech-Language Pathologist)
Address: Sunnyvale, CA, 94089

Verify this record

Cross-check NPI 1457789729 against the authoritative CMS record: view Ewa Witkowska on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

Where does Ewa Witkowska practice?

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

What is the NPI number for Ewa Witkowska?

The National Provider Identifier (NPI) for Ewa Witkowska is 1457789729, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2013-10-24.