KATHERINE E DUFFY-SHERR
NPI 1417893975
Speech-Language Pathologist in Antioch, CA

Q: What is Katherine Duffy-sherr's NPI number?

The NPI number for Katherine Duffy-sherr is 1417893975. It was assigned to this individual provider in the NPPES registry on April 27, 2026.

Q: What is Katherine Duffy-sherr's specialty?

The primary specialty registered for this NPI is Speech-Language Pathologist with taxonomy code 235Z00000X.

Active since April 27, 2026

4207B DELTA FAIR BLVD, ANTIOCH, CA 94509(925) 777-2000 Get Directions Write a Review

NPPES record last updated: April 27, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Katherine E Duffy-sherr NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

KATHERINE E DUFFY-SHERR (NPI 1417893975) is an individual speech-language pathologist provider in Antioch, California, licensed in California (20014) and active in the NPI registry since April 2026.

NPPES Registry Identity

NPI1417893975

Entity TypeIndividual

Primary Taxonomy235Z00000X

Provider Legal NameKATHERINE E DUFFY-SHERR

Location Address4207B DELTA FAIR BLVDAntioch, CA 94509-3944

Mailing Address77 Santa Barbara RdPleasant Hill, CA 94523-4201 · (925) 942-3388

Phone(925) 777-2000

Sole ProprietorNo

Enumeration DateApril 27, 2026

NPPES CertifiedApril 27, 2026

✔ NPI 1417893975 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpeech-Language PathologistSpeech, Language and Hearing Service Providers

Taxonomy Code235Z00000X

License✔ Licensed in CA · 20014

Definition

The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. Speech-language pathologists address typical and atypical impairments and disorders related to communication and swallowing in the areas of speech sound production, resonance, voice, fluency, language (comprehension and expression), cognition, and feeding and swallowing.

4207B DELTA FAIR BLVD, Antioch, CA 94509

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Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Katherine Duffy-sherr's NPI number?

The NPI number for Katherine Duffy-sherr is 1417893975. It was assigned to this individual provider in the NPPES registry on April 27, 2026.

Where is Katherine Duffy-sherr located?

Katherine Duffy-sherr practices at 4207B Delta Fair Blvd, Antioch, CA 94509. The listed phone number is (925) 777-2000.

What is Katherine Duffy-sherr's specialty?

The primary specialty registered for this NPI is Speech-Language Pathologist with taxonomy code 235Z00000X.

When was this NPI record last updated?

The NPPES record for Katherine Duffy-sherr was last updated on April 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.