Alyssa Marie Nielsen, MD

Primary specialty

Student in an Organized Health Care Education/Training ProgramTaxonomy code 390200000X

License

82207 Issued in CT

Practice address

34 Park St
New Haven, CT 06519-1109

Phone

(203) 444-8879

NPI assigned

Mar 20, 2023

Sex

Female

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 CT

Eligible to order & refer

• Part B services: No
• Medical equipment: Yes
• Home health: No
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Interoperability endpoints

• Direct secure messaging: anielsen617574@direct.ynhh.org

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

{
    "created_epoch": "1679270400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782864000000",
    "number": "1417659780",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "300 GEORGE ST STE 901",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "065116662",
            "telephone_number": "203-785-2095"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "34 PARK ST",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "065191109",
            "telephone_number": "203-444-8879"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "NIELSEN",
        "first_name": "ALYSSA",
        "middle_name": "MARIE",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2023-03-20",
        "last_updated": "2026-07-01",
        "certification_date": "2026-07-01",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": "CT",
            "license": "82207",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Allen Daniel Nicholson, M.D.
• Phillipa Nicholson, LPN
• Nicole R. Kerr, LLC
• Zoe Sylvia Nicozisin, MD
• Regina A Niekrash, D.M.D.
• Cynthia Anne Nielsen, MSW
• Jessica Marie Nieves
• Ariyaneh Nikbin, MD
• Laura E Niklason, MD
• Sen Jacob Ninan, BA, MD

• Student in an Organized Health Care Education/Training Program in New Haven, CT
• Providers in New Haven, CT by specialty
• Student in an Organized Health Care Education/Training Program in Connecticut

• 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.