Individual provider Active NPI

Mayda T Graulau Santiago, PHD

  • Counseling Psychologist
  • San Sebastian, PR
National Provider Identifier
1407653041
Registry record updated Jun 29, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Counseling PsychologistTaxonomy code 103TC1900X
License
7805 Issued in PR
Practice address
21 Calle Severo Arana
San Sebastian, PR 00685-2310
Phone
(787) 243-6908
NPI assigned
Mar 1, 2025
Sex
Female
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Jun 29, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Counseling Psychologist 103TC1900X 7805 PR Primary

Addresses

Primary practice location

21 Calle Severo Arana
San Sebastian, PR 00685-2310

Mailing address

700 Ave Jobos Apt 714
Isabela, PR 00662-5507
Phone (787) 243-6908

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled
Credentials
Doctor of Philosophy

State licenses

LicenseStateTypeSpecialty
7805PRMDPharmacy Technician

Practice roles

OrganizationSpecialtyStatusNew patients
MGS Psicolog@S Limited Liability Company Counseling CurrentSince Apr 20, 2025 Accepting new patients
MGS Psicologos Limited Liability Company Counseling PastSince Apr 20, 2025 Accepting new patients

Locations

21 Calle Severo Arana
San Sebastian, PR 00685
Phone (787) 396-6791

Organizations & group practices 2

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.

NPI Registry JSON

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

{
    "created_epoch": "1740787200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782691200000",
    "number": "1407653041",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "700 AVE JOBOS APT 714",
            "city": "ISABELA",
            "state": "PR",
            "postal_code": "006625507",
            "telephone_number": "787-243-6908"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "21 CALLE SEVERO ARANA",
            "city": "SAN SEBASTIAN",
            "state": "PR",
            "postal_code": "006852310",
            "telephone_number": "787-243-6908"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GRAULAU SANTIAGO",
        "first_name": "MAYDA",
        "middle_name": "T",
        "name_prefix": "Dr.",
        "credential": "PHD",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2025-03-01",
        "last_updated": "2026-06-29",
        "certification_date": "2026-06-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103TC1900X",
            "taxonomy_group": "",
            "desc": "Psychologist, Counseling",
            "state": "PR",
            "license": "7805",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in San Sebastian, PR

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 29, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.