Marcos Santiago Hernandez, MD

Primary specialty

SpecialistTaxonomy code 174400000X

License

80006 Issued in PR

Practice address

Ashford Medical Center
Oficina 805 Calle Washington
San Juan, PR 00907-1524

Phone

(787) 600-6411

NPI assigned

Aug 16, 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, 1982

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Practice addresses (Care Compare)

Hospital & facility affiliations

• Presbyterian Community Hospital Hospital, San Juan, PR, CCN 400001

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.

• San Juan Internal Medicine LLC

  • Specialist
  • San Juan, PR
  • NPI 1295498889
  Medicare reassignment
• Integrated Internal Medicine Services LLC

  • Specialist
  • San Juan, PR
  • NPI 1992394787
  NPD (past)

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

• Presbyterian Community Hospital, Inc

  dba Ashford Presbyterian Community Hospital

  • General Acute Care Hospital
  • San Juan, PR
  • NPI 1770580813
  Care Compare affiliation

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

{
    "created_epoch": "1155686400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782864000000",
    "number": "1619080389",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 8069",
            "city": "SAN JUAN",
            "state": "PR",
            "postal_code": "009100069",
            "telephone_number": "787-600-6411"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "ASHFORD MEDICAL CENTER",
            "address_2": "OFICINA 805 CALLE WASHINGTON",
            "city": "SAN JUAN",
            "state": "PR",
            "postal_code": "009071524",
            "telephone_number": "787-600-6411"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SANTIAGO HERNANDEZ",
        "first_name": "MARCOS",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-08-16",
        "last_updated": "2026-07-01",
        "certification_date": "2026-07-01",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "174400000X",
            "taxonomy_group": "",
            "desc": "Specialist",
            "state": "PR",
            "license": "80006",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Cinthia Santiago Diaz, LCDA.
• Rafael E Santiago Feliciano, MSW
• Melissa Santiago Garraton, M.D.
• Emmanuel Jose Santiago Gonzalez
• Juan Carlos Santiago Gonzalez, MD
• Diego Fernando Santiago Jimenez
• Andrea Cristina Santiago Leon
• Yainy Yalich Santiago Martinez
• Virginia Margarita Santiago Mercado, BSMT
• Jessyca Cristina Santiago Morales, MD

• Specialist in San Juan, PR
• Providers in San Juan, PR by specialty
• Specialist in Puerto Rico

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 1, 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.