Katherine De Castro, PA-C
Medical Physician Assistant · Antioch, CA
Katherine De Castro, PA-C is a medical physician assistant with a practice address in Antioch, California, and NPI 1598501991, issued on Jul 4, 2024. Check the license with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Katherine De Castro
- Credential
- PA-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- Practice location
- 3903 Lone Tree Way Ste 104, Antioch, CA 94509
- Phone
- (925) 755-1255
- Enumerated
- Jul 4, 2024
- Record last updated
- Oct 29, 2025
- Medicare enrollment
- Enrolled (PECOS I20250925002096); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 3,376 in California → Look up another NPI →
Also registered at 3903 Lone Tree Way Ste 104
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Katherine De Castro in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Katherine De Castro among 3,376 medical physician assistant records in California
Katherine De Castro, PA-C is one of 3,376 medical physician assistant records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2024, is newer than 89% of them.
- NPI issued2024 · 89% of these records are older, 6% newer
- In a Medicare fileNo · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2025 · median 2012 among the 1,347 with a school on file
- Record last updated2025 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in California
There are 3,376 medical physician assistant records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,376 in California → Every provider in Antioch → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Margaret Bear, PA-CAntioch, CA 945091073460341
- James Jewell, PAAntioch, CA 945091437172848
- Christina Ramsden, PAAntioch, CA 945091497013965
- Jason Thompson, PAAntioch, CA 945091285157818
- Larry Angel, PA-CBenicia, CA 945101154708881
- Rachel KennedyBenicia, CA 945101801095799
- Richard Cazin, PADanville, CA 945061043201460
- Annie Humphrey, PA-CDanville, CA 945061427681535
Common questions
What is Katherine De Castro, PA-C's NPI number?
Katherine De Castro, PA-C's National Provider Identifier (NPI) is 1598501991, issued on Jul 4, 2024. An NPI identifies a provider in billing; it is not a license.
Where is Katherine De Castro, PA-C located?
The NPPES record lists a practice address at 3903 Lone Tree Way Ste 104, Antioch, CA, 94509. Phone: (925) 755-1255. Providers update this record themselves, so call before visiting.
How can I verify Katherine De Castro, PA-C's license?
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. 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.