NPIMap

Individual provider Active NPI

Anthony Nehlsen, MD

  • Radiation Oncology Physician
  • New York, NY
National Provider Identifier
1144753567
Registry record updated Nov 7, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Radiation Oncology PhysicianTaxonomy code 2085R0001X
License
316701 Issued in NY
Practice address
1000 10TH Ave
New York, NY 10019-1147
Phone
(212) 523-7165
NPI assigned
Apr 4, 2017
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Nov 7, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Radiation Oncology Physician 2085R0001X 316701 NY Primary
Student in an Organized Health Care Education/Training Program 390200000X

Addresses

Primary practice location

1000 10TH Ave
New York, NY 10019-1147

Mailing address

1000 10TH Ave
New York, NY 10019-1147
Phone (212) 523-7165

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in NY
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20220714002922 NY Practitioner - Radiation Oncology 8820334782 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Radiation Oncology
Education
Other, 2017
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
The New York Proton CenterGroup PAC ID 2466780218, 45 clinicians

Practice addresses (Care Compare)

1 Gustave L Levy PL
New York, NY 10029-6504
Phone (212) 241-6500

225 E 126TH St
New York, NY 10035-1406
Phone (646) 968-9064

Hospital & facility affiliations

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
316701NYMDRadiation Oncology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
The New York Proton Center Radiation Oncology CurrentSince Jul 17, 2022 Accepting new patients
Icahn School of Medicine at Mount Sinai Radiation Oncology CurrentSince Aug 1, 2022 Accepting new patients
Icahn School of Medicine at Mount Sinai CurrentSince Aug 1, 2022 Accepting new patients
Icahn School of Medicine at Mount Sinai Past Accepting new patients
Icahn School of Medicine at Mount Sinai Past Accepting new patients

Locations

2322 30th Ave
Fl B
Astoria, NY 11102

2322 30th Ave
Astoria, NY 11102
Phone (718) 267-2763

2510 30th Ave
Long Island City, NY 11102
Phone (718) 267-4245

1184 5th Ave
Fl 1
New York, NY 10029
Phone (212) 241-7500

325 W 15th St
Ste D
New York, NY 10011

10 Union Sq E
Ste 4F
New York, NY 10003
Phone (212) 844-8020

1000 10th Ave
Ste Ll
New York, NY 10019

1000 10th Ave
New York, NY 10019
Phone (212) 523-2369

225 E 126th St
New York, NY 10035
Phone (646) 813-1880

5 E 98th St
Fl 5
New York, NY 10029
Phone (212) 241-8234

Networks

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

Organizations & group practices 5

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 8

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": "1491264000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1762473600000",
    "number": "1144753567",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1000 10TH AVE",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100191147",
            "telephone_number": "212-523-7165"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1000 10TH AVE",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100191147",
            "telephone_number": "212-523-7165"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "NEHLSEN",
        "first_name": "ANTHONY",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2017-04-04",
        "last_updated": "2025-11-07",
        "certification_date": "2025-11-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "NY",
            "license": "316701",
            "primary": true
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in New York, NY

Sources for this page

Verify at the official NPI Registry.