Katherine Alfieri
Physician Assistant · Rancho Santa Margarita, CA
Katherine Alfieri is a physician assistant with a practice address in Rancho Santa Margarita, California, and NPI 1790525640, issued on May 29, 2024. Check the license (California PA65142, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katherine Alfieri
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA65142 CA
Self-reported in NPPES; status is on the state search - Practice location
- 30465 Avenida DE Las Flores Ste A, Rancho Santa Margarita, CA 92688
- Phone
- (503) 896-8496
- Enumerated
- May 29, 2024
- Record last updated
- Oct 15, 2025
- Medicare enrollment
- Enrolled (PECOS I20250411000615); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Verify Katherine Alfieri in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA65142Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Dalia Dawoud MD IncCorona, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Alfieri among 14,451 physician assistant records in California
Katherine Alfieri is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2024, is newer than 87% of them.
- NPI issued2024 · 87% of these records are older, 7% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2024 · median 2018 among the 7,214 with a school on file
- Record last updated2025 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 physician assistant records list a practice address in Rancho Santa Margarita
They are 16 of the 479 NPPES records with a practice address in Rancho Santa Margarita, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Rancho Santa Margarita → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Jonathan ChapRancho Santa Margarita, CA 926881306510888
- Heather Cyge, PARancho Santa Margarita, CA 926881881939213
- Fatema Dewji, PHYSICIAN ASSISTANTRancho Santa Margarita, CA 926881609420348
- Kaitlyn GreeneRancho Santa Margarita, CA 926881881212728
- Sonja Harangozo, PA-CRancho Santa Margarita, CA 926881033459631
- Nicholas KleenRancho Santa Margarita, CA 926881750730651
- Taylor Medeiros, PA-CRancho Santa Margarita, CA 926881457936213
- Annelise Merriner, PA-CRancho Santa Margarita, CA 926881811238777
Common questions
What is Katherine Alfieri's NPI number?
Katherine Alfieri's National Provider Identifier (NPI) is 1790525640, issued on May 29, 2024. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Alfieri located?
The NPPES record lists a practice address at 30465 Avenida DE Las Flores Ste A, Rancho Santa Margarita, CA, 92688. Phone: (503) 896-8496. Providers update this record themselves, so call before visiting.
How can I verify Katherine Alfieri's license?
NPPES lists California license number PA65142, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.