William Titley Diaz, MD

Primary specialty

Student in an Organized Health Care Education/Training ProgramTaxonomy code 390200000X

License

21541 Issued in PR

Practice address

Hospital Upr Federico Trilla Ave 65 Infanteria
Primer Piso Area Administrativa
Carolina, PR 00984

Phone

(787) 769-4520

NPI assigned

Sep 2, 2016

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in PR

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

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

{
    "created_epoch": "1472774400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1749513600000",
    "number": "1841747144",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "CARRETERA 3 KM 8.3 AVE 65 INFANTERIA",
            "address_2": "HOSPITAL UPR FEDERICO TRILLA",
            "city": "CAROLINA",
            "state": "PR",
            "postal_code": "00984",
            "telephone_number": "787-769-4520"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "HOSPITAL UPR FEDERICO TRILLA AVE 65 INFANTERIA",
            "address_2": "PRIMER PISO AREA ADMINISTRATIVA",
            "city": "CAROLINA",
            "state": "PR",
            "postal_code": "00984",
            "telephone_number": "787-769-4520"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TITLEY DIAZ",
        "first_name": "WILLIAM",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2016-09-02",
        "last_updated": "2025-06-10",
        "certification_date": "2025-06-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208600000X",
            "taxonomy_group": "",
            "desc": "Surgery",
            "state": "PR",
            "license": "14929I",
            "primary": false
        },
        {
            "code": "208D00000X",
            "taxonomy_group": "",
            "desc": "General Practice",
            "state": "PR",
            "license": "21541",
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": "PR",
            "license": "21541",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Student in an Organized Health Care Education/Training Program in Carolina, PR
• Providers in Carolina, PR by specialty
• Student in an Organized Health Care Education/Training Program in Puerto Rico

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 10, 2025; 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.