Prometheus Medical Group PSC

Primary specialty

Hematology & Oncology PhysicianTaxonomy code 207RH0003X

Legal business name

PROMETHEUS MEDICAL GROUP PSC

Doing business as

Clinica de Oncologia Dr. Sixto Perez

Practice address

Torre del Metropolitano 1789 Carr 21
Suite 301
San Juan, PR 00921

Phone

(787) 463-9619

NPI assigned

Nov 15, 2018

Organization subpart

No

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

Authorized official

Name

Sixto Perez Garcia, MDNPI 1649240110

Title

Owner

Phone

(787) 250-7338

Specialties & licenses 1

Addresses

Other names 2

• Clinica de Oncologia Dr. Sixto Perez Doing business as
• Prometheus Medical Group Former legal business name

Medicare fee-for-service enrollment

Enrolled in PR

Enrollment records 1

Locations

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• Sixto Perez Garcia, MD

  • Hematology & Oncology Physician
  • San Juan, PR
  • NPI 1649240110
  Medicare reassignment NPD Authorized official

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

{
    "created_epoch": "1542240000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1769472000000",
    "number": "1083183388",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1789 CARR 21 STE 301",
            "city": "SAN JUAN",
            "state": "PR",
            "postal_code": "009213337",
            "telephone_number": "787-250-7338",
            "fax_number": "787-705-7974"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "TORRE DEL METROPOLITANO 1789 CARR 21",
            "address_2": "SUITE 301",
            "city": "SAN JUAN",
            "state": "PR",
            "postal_code": "00921",
            "telephone_number": "787-463-9619"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "PROMETHEUS MEDICAL GROUP PSC",
        "organizational_subpart": "NO",
        "enumeration_date": "2018-11-15",
        "last_updated": "2026-01-27",
        "certification_date": "2026-01-27",
        "status": "A",
        "authorized_official_last_name": "PEREZ GARCIA",
        "authorized_official_first_name": "SIXTO",
        "authorized_official_title_or_position": "OWNER",
        "authorized_official_telephone_number": "787-250-7338",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "207RH0003X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Clinica de Oncologia Dr. Sixto Perez",
            "code": "3",
            "type": "Doing Business As"
        },
        {
            "organization_name": "Prometheus Medical Group",
            "code": "4",
            "type": "Former Legal Business Name"
        }
    ]
}

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• Hematology & Oncology Physician in San Juan, PR
• Providers in San Juan, PR by specialty
• Hematology & Oncology Physician in Puerto Rico

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 27, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.