Katherine Alfieri
NPI 1790525640 · Physician Assistant · Rancho Santa Margarita, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Alfieri is a Physician Assistant provider in Rancho Santa Margarita, CA (NPI 1790525640).
Provider details
- NPI number
- 1790525640
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- PA65142 (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
2 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
- 2024-05-29
- Last updated
- 2025-10-15
- Certified
- 2025-10-15
Frequently asked questions
- What is Katherine Alfieri's NPI number?
- Katherine Alfieri's National Provider Identifier (NPI) is 1790525640, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Alfieri's specialty?
- Katherine Alfieri is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Katherine Alfieri located?
- Katherine Alfieri's practice location on file with NPPES is 30465 Avenida De Las Flores Ste a, Rancho Santa Margarita, CA 92688-3937.
- What is Katherine Alfieri's phone number?
- The practice phone number listed in the NPPES registry for Katherine Alfieri is (503) 896-8496.
- Does Katherine Alfieri accept Medicare?
- Katherine Alfieri is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Alfieri's NPI active?
- Yes — Katherine Alfieri's NPI (1790525640) is active in the NPPES registry as of the last update on 2025-10-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.