Katherine Duffy-Sherr
NPI 1417893975 · Speech-Language Pathologist · Antioch, CA
Katherine Duffy-Sherr is a Speech-Language Pathologist provider in Antioch, CA (NPI 1417893975).
Provider details
- NPI number
- 1417893975
- Entity type
- Individual
- Primary specialty
- Speech-Language PathologistSpeech, Language and Hearing Service Providers
- Sole proprietor
- No
- License
- 20014 (CA)
Specialties & taxonomies
Speech, Language and Hearing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2026-04-27
- Last updated
- 2026-04-27
- Certified
- 2026-04-27
Frequently asked questions
- What is Katherine Duffy-Sherr's NPI number?
- Katherine Duffy-Sherr's National Provider Identifier (NPI) is 1417893975, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Duffy-Sherr's specialty?
- Katherine Duffy-Sherr is listed in the NPPES registry with a primary specialty of Speech-Language Pathologist (Speech, Language and Hearing Service Providers).
- Where is Katherine Duffy-Sherr located?
- Katherine Duffy-Sherr's practice location on file with NPPES is 4207b Delta Fair Blvd, Antioch, CA 94509-3944.
- What is Katherine Duffy-Sherr's phone number?
- The practice phone number listed in the NPPES registry for Katherine Duffy-Sherr is (925) 777-2000.
- Is Katherine Duffy-Sherr's NPI active?
- Yes — Katherine Duffy-Sherr's NPI (1417893975) is active in the NPPES registry as of the last update on 2026-04-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.