Katharine Sherwin, PA
NPI 1528521168 · Physician Assistant · Palo Alto, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katharine Sherwin, PA is a Physician Assistant provider in Palo Alto, CA (NPI 1528521168).
Provider details
- NPI number
- 1528521168
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Female
- Sole proprietor
- No
- License
- 57623 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 yrs in NPPES 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
- 2019-04-10
- Last updated
- 2020-04-23
- Certified
- 2020-04-23
Frequently asked questions
- What is Katharine Sherwin's NPI number?
- Katharine Sherwin's National Provider Identifier (NPI) is 1528521168, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katharine Sherwin's specialty?
- Katharine Sherwin is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Katharine Sherwin located?
- Katharine Sherwin's practice location on file with NPPES is 725 Welch Rd, Palo Alto, CA 94304-1601.
- What is Katharine Sherwin's phone number?
- The practice phone number listed in the NPPES registry for Katharine Sherwin is (650) 497-8000.
- Does Katharine Sherwin accept Medicare?
- Katharine Sherwin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katharine Sherwin's NPI active?
- Yes — Katharine Sherwin's NPI (1528521168) is active in the NPPES registry as of the last update on 2020-04-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.