NPIMap

Individual provider Active NPI

Mark Henry Alon, M.D.

  • Hospitalist Physician
  • White Plains, NY
National Provider Identifier
1972910164
Registry record updated Jan 9, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Hospitalist PhysicianTaxonomy code 208M00000X
License
311716-01 Issued in NY
Practice address
41 E Post Rd
White Plains, NY 10601-4699
Phone
(914) 681-0600
NPI assigned
Jul 20, 2014
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jan 9, 2026

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Hospitalist Physician 208M00000X 66871 WI
Hospitalist Physician 208M00000X 311716-01 NY Primary
Internal Medicine Physician 207R00000X 311716-01 NY

Addresses

Primary practice location

41 E Post Rd
White Plains, NY 10601-4699

Mailing address

41 E Post Rd
White Plains, NY 10601-4699
Phone (914) 681-0600

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
I20210920002023 NY Practitioner - Hospitalist 5294003703 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
Hospitalist
Education
Other, 2009
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Icahn School of Medicine at Mount SinaiGroup PAC ID 2264691070, 2,809 clinicians
East Post Road Medical Services PCGroup PAC ID 6406198506, 419 clinicians

Practice addresses (Care Compare)

1000 10TH Ave
New York, NY 10019-1147
Phone (212) 523-6500

41 E Post Rd
White Plains, NY 10601-4607
Phone (914) 681-0600

Hospital & facility affiliations

  • White Plains Hospital Center Hospital, White Plains, NY, CCN 330304
  • Mount Sinai West Hospital, New York, NY, CCN 330046

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
311716-01NYMDHospitalist Physician
66871WIMDHospitalist Physician

Practice roles (6 of 10)

OrganizationSpecialtyStatusNew patients
Icahn School of Medicine at Mount Sinai Current Accepting new patients
Icahn School of Medicine at Mount Sinai CurrentSince Oct 1, 2021 Accepting new patients
Icahn School of Medicine at Mount Sinai Internal Medicine CurrentSince Oct 1, 2021 Accepting new patients
East Post Road Medical Services PC Hospitalist CurrentSince Nov 18, 2025 Accepting new patients
St Lukes Roosevelt Hospital Center Past Accepting new patients
White Plains Hospital Medical Center Past Accepting new patients

Locations

17 E 102nd St
New York, NY 10029
Phone (212) 241-7968

1111 Amsterdam Ave
New York, NY 10025
Phone (212) 523-2309

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

41 E Post Rd
White Plains, NY 10601
Phone (914) 681-1201

Networks

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

Organizations & group practices 7

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 3

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": "1405814400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1767916800000",
    "number": "1972910164",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "41 E POST RD",
            "city": "WHITE PLAINS",
            "state": "NY",
            "postal_code": "106014699",
            "telephone_number": "914-681-0600"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "41 E POST RD",
            "city": "WHITE PLAINS",
            "state": "NY",
            "postal_code": "106014699",
            "telephone_number": "914-681-0600"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ALON",
        "first_name": "MARK HENRY",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2014-07-20",
        "last_updated": "2026-01-09",
        "certification_date": "2026-01-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "WI",
            "license": "66871",
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "NY",
            "license": "311716-01",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NY",
            "license": "311716-01",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in White Plains, NY

Sources for this page

Verify at the official NPI Registry.