Caitlin De Castro

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

PA64051 Issued in CA

Practice address

50 S San Mateo Dr
San Mateo, CA 94401-3857

Phone

(650) 652-8500

Fax

(650) 652-8501

NPI assigned

Sep 13, 2023

Sex

Female

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Physician Assistant

Education

Other, 2023

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Providence Medical FoundationGroup PAC ID 8921993205, 1,461 clinicians

Sutter Bay Medical FoundationGroup PAC ID 4284538778, 3,783 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Providence Santa Rosa Memorial Hospital Hospital, Santa Rosa, CA, CCN 050174

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

State licenses

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Providence Medical Foundation

  • Family Medicine Physician
  • Brea, CA
  • NPI 1871607762
  Medicare reassignment Care Compare group NPD (past)
• Sutter Bay Medical Foundation

  • Multi-Specialty Clinic/Center
  • Palo Alto, CA
  • NPI 1013950807
  Medicare reassignment Care Compare group
• Providence Medical Foundation

  • Surgery Physician
  • Eureka, CA
  • NPI 1477790517
  NPD
• Providence Medical Foundation

  • Family Medicine Physician
  • Anaheim, CA
  • NPI 1639715709
  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• St. Joseph Health Northern California, LLC

  • General Acute Care Hospital
  • Santa Rosa, CA
  • NPI 1134152549
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1694563200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1777939200000",
    "number": "1265219075",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 276950",
            "city": "SACRAMENTO",
            "state": "CA",
            "postal_code": "958276950",
            "telephone_number": "650-652-8500"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "50 S SAN MATEO DR",
            "city": "SAN MATEO",
            "state": "CA",
            "postal_code": "944013857",
            "telephone_number": "650-652-8500",
            "fax_number": "650-652-8501"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1162 Montgomery Dr Fl 2",
            "address_purpose": "LOCATION",
            "city": "Santa Rosa",
            "state": "CA",
            "postal_code": "954054802",
            "country_code": "US",
            "telephone_number": "707-890-4100",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "DE CASTRO",
        "first_name": "CAITLIN",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2023-09-13",
        "last_updated": "2026-05-05",
        "certification_date": "2026-05-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "CA",
            "license": "PA64051",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Sarah J Davis, M.A.
• Tyler Davis, DMD
• Zane Adam Davis
• Joshua Craig Hernandez Daya
• Nichole De Anda
• Emily De Dios
• Diana Lee De Guzman
• Olivia De Guzman, RN
• Samantha De Guzman
• Emerson Manuel De Jesus, M.D.

• Physician Assistant in San Mateo, CA
• Providers in San Mateo, CA by specialty
• Physician Assistant in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 5, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.