Individual provider Active NPI

Isabelle Kathryn Avildsen, PHD

  • Clinical Neuropsychologist
  • New York, NY
National Provider Identifier
1497598080
Registry record updated Oct 31, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Clinical NeuropsychologistTaxonomy code 103G00000X
License
025804 Issued in NY
Practice address
223 E 34TH St
New York, NY 10016-4852
Phone
(646) 558-0800
Fax
(929) 455-9393
NPI assigned
Jun 13, 2024
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Oct 31, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Clinical Psychologist 103TC0700X 025804 NY
Clinical Neuropsychologist 103G00000X 025804 NY Primary

Addresses

Primary practice location

223 E 34TH St
New York, NY 10016-4852

Mailing address

223 E 34TH St
New York, NY 10016-4852
Phone (646) 558-0800

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in NY
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: No
  • Power mobility devices: No
  • Hospice: No
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20241008000059 NY Practitioner - Clinical Psychologist 0345771952 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Clinical Psychologist
Education
Other, 2022
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
New York UniversityGroup PAC ID 1355232422, 5,925 clinicians

Practice addresses (Care Compare)

111 Broadway
New York, NY 10006-1901
Phone (212) 263-9700

530 1St Ave
New York, NY 10016-6402
Phone (212) 263-7300

550 1St Ave
New York, NY 10016-6402
Phone (212) 263-7300

560 1St Ave
New York, NY 10016-6402
Phone (212) 263-7300

724 2ND Ave
New York, NY 10016-2710
Phone (212) 871-0227

Hospital & facility affiliations

  • NYU Langone Hospitals Hospital, New York, NY, CCN 330214

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Philosophy

State licenses

LicenseStateTypeSpecialty
025804NYMDClinical Neuropsychologist

Practice roles

OrganizationSpecialtyStatusNew patients
New York University CurrentSince Sep 1, 2024 Accepting new patients
New York University CurrentSince Sep 1, 2024 Accepting new patients

Locations

700 Hicksville Rd
Ste 205
Bethpage, NY 11714
Phone (646) 501-3325

223 E 34th St
New York, NY 10016
Phone (212) 263-8854

Networks

  • Healthfirst Medicare Network H5989
  • Healthfirst Medicare Network H9678
  • Healthfirst Medicare Network H3359
  • Healthfirst Medicare Network H1722

Interoperability endpoints

  • Direct secure messaging: iavildsen366024@nyumc.direct-ci.com

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.

Hospital & facility affiliations 7

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

NPI Registry JSON

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

{
    "created_epoch": "1718236800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1761868800000",
    "number": "1497598080",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "223 E 34TH ST",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100164852",
            "telephone_number": "646-558-0800",
            "fax_number": "929-455-9393"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "223 E 34TH ST",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100164852",
            "telephone_number": "646-558-0800",
            "fax_number": "929-455-9393"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "AVILDSEN",
        "first_name": "ISABELLE",
        "middle_name": "KATHRYN",
        "credential": "PHD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2024-06-13",
        "last_updated": "2025-10-31",
        "certification_date": "2025-10-31",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103TC0700X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical",
            "state": "NY",
            "license": "025804",
            "primary": false
        },
        {
            "code": "103G00000X",
            "taxonomy_group": "",
            "desc": "Clinical Neuropsychologist",
            "state": "NY",
            "license": "025804",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in New York, NY

Sources for this page

Verify at the official NPI Registry.