NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Chiara Castelli, PA-C

Physician Assistant in Monterey, CA · enumerated 2015.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1538546981

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Chiara Castelli
Credential PA-C
Sex Female
Practice address Monterey, CA, 93940
Phone (831) 585-9608
Enumeration date May 5, 2015
Last updated in NPPES Feb 17, 2017

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 52462 (CA) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Chiara Castelli practice?
The practice location on file with NPPES is in Monterey, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Chiara Castelli?
The National Provider Identifier (NPI) for Chiara Castelli is 1538546981, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-02-17.