Trillium Psychological Services PLLC

Primary specialty

PsychologistTaxonomy code 103T00000X

Legal business name

TRILLIUM PSYCHOLOGICAL SERVICES PLLC

Practice address

40900 Merchants LN Unit 207
Leonardtown, MD 20650-3796

Phone

(518) 369-5258

NPI assigned

Jul 3, 2025

Organization subpart

No

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

Authorized official

Name

Michelle McDonald, PH.DNPI 1417494469

Title

Owner

Phone

(518) 369-5282

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in MD

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.

• Michelle McDonald, PHD

  • Clinical Psychologist
  • Leonardtown, MD
  • NPI 1417494469
  Medicare reassignment Authorized official

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

{
    "created_epoch": "1751500800000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1765756800000",
    "number": "1053201970",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "40900 MERCHANTS LN UNIT 207",
            "city": "LEONARDTOWN",
            "state": "MD",
            "postal_code": "206503796",
            "telephone_number": "518-369-5282",
            "fax_number": "301-560-4954"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "40900 MERCHANTS LN UNIT 207",
            "city": "LEONARDTOWN",
            "state": "MD",
            "postal_code": "206503796",
            "telephone_number": "518-369-5258"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "TRILLIUM PSYCHOLOGICAL SERVICES PLLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2025-07-03",
        "last_updated": "2025-12-15",
        "certification_date": "2025-12-15",
        "status": "A",
        "authorized_official_last_name": "MCDONALD",
        "authorized_official_first_name": "MICHELLE",
        "authorized_official_title_or_position": "OWNER",
        "authorized_official_telephone_number": "518-369-5282",
        "authorized_official_credential": "PH.D"
    },
    "taxonomies": [
        {
            "code": "103T00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Psychologist",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Psychologist in Leonardtown, MD
• Providers in Leonardtown, MD by specialty
• Psychologist in Maryland

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 15, 2025; 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.