Elfren Martinez, M.D

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

8300 Issued in PR

Practice address

94 Calle Munoz Rivera
Aguas Buenas, PR 00703-3100

Phone

(787) 732-0303

Fax

(787) 732-0303

NPI assigned

Feb 15, 2006

Sex

Male

Sole proprietor

Yes

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 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

Internal Medicine

Education

Other, 1983

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

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.

• Martinez Lorenzo Internal Medicine Services PSC

  • Specialist
  • Aguas Buenas, PR
  • NPI 1215961388
  Medicare reassignment NPD Authorized official

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

{
    "created_epoch": "1139961600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757203200000",
    "number": "1245204411",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 9419",
            "city": "CAGUAS",
            "state": "PR",
            "postal_code": "007269419",
            "telephone_number": "787-732-0303"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "94 CALLE MUNOZ RIVERA",
            "city": "AGUAS BUENAS",
            "state": "PR",
            "postal_code": "007033100",
            "telephone_number": "787-732-0303",
            "fax_number": "787-732-0303"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MARTINEZ",
        "first_name": "ELFREN",
        "name_prefix": "Dr.",
        "credential": "M.D",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-02-15",
        "last_updated": "2025-09-07",
        "certification_date": "2025-09-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "PR",
            "license": "8300",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Juanita Lopez Ortiz, RPT
• Lydia E Lopez, MSW
• Kevin Javier Luque, PHARM TECH
• M&E Medical Device Corp.
• Martinez Lorenzo Internal Medicine Services PSC
• Edna Matos-Cruz
• MB Clinical Laboratories Corp
• MB Clinical Laboratories Corp.
• MB Clinical Laboratories Corp.
• MB Clinical Laboratories Corp.

• Internal Medicine Physician in Aguas Buenas, PR
• Providers in Aguas Buenas, PR by specialty
• Internal Medicine Physician in Puerto Rico

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 7, 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.
• 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.