Mervin De Guzman Diaz, MD

Primary specialty

General Practice PhysicianTaxonomy code 208D00000X

License

24685 Issued in PR

Practice address

355 Calle Font Martelo
Humacao, PR 00791-3249

Phone

(787) 852-0768

NPI assigned

Sep 19, 2020

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 2

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

Specialty

General Practice

Education

Other, 2020

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Practice addresses (Care Compare)

Hospital & facility affiliations

• Ryder Memorial Hospital Inc Hospital, Humacao, PR, CCN 400007

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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

• Ryder Memorial Hospital Inc

  • General Acute Care Hospital
  • Humacao, PR
  • NPI 1447270319
  Care Compare affiliation

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

{
    "created_epoch": "1600473600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1779580800000",
    "number": "1548876121",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 59",
            "city": "FAJARDO",
            "state": "PR",
            "postal_code": "007380059",
            "telephone_number": "787-718-2715"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "355 CALLE FONT MARTELO",
            "city": "HUMACAO",
            "state": "PR",
            "postal_code": "007913249",
            "telephone_number": "787-852-0768"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DE GUZMAN DIAZ",
        "first_name": "MERVIN",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2020-09-19",
        "last_updated": "2026-05-24",
        "certification_date": "2026-05-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "PR",
            "license": "24685",
            "primary": false
        },
        {
            "code": "208D00000X",
            "taxonomy_group": "",
            "desc": "General Practice",
            "state": "PR",
            "license": "24685",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Olga E Davila-Diaz, MPSY
• Zahira I Davila, OPTOMETRIST
• Zaida I. Davila, M.D.
• Dba Dr. Noel Arnau
• Dba Humacao Anesthesia Service
• Luis Ernesto De Jesus Burgos, DOCTOR
• Javier Miguel De Jesus-Orpi, DPM
• Julio Angel De la Cruz - Rosado, MD
• Jose Manuel De la Rosa, MD
• Denisse De Leon, MPSY

• General Practice Physician in Humacao, PR
• Providers in Humacao, PR by specialty
• General Practice Physician in Puerto Rico

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 24, 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.