NPIMap

Individual provider Active NPI

Mark Jeyaseelan Amirtharaj, MD

  • Orthopaedic Surgery Physician
  • White Plains, NY
National Provider Identifier
1376037895
Registry record updated Jul 15, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Orthopaedic Surgery PhysicianTaxonomy code 207X00000X
License
321558 Issued in NY
Practice address
1133 Westcheste Ave
White Plains, NY 10605
Phone
(212) 606-1000
NPI assigned
Jun 18, 2018
Last updated
Jul 15, 2025By the provider in NPPES
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Jul 15, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Orthopaedic Surgery Physician 207X00000X 8327 NE
Orthopaedic Surgery Physician 207X00000X 321558 NY Primary

Addresses

Primary practice location

1133 Westcheste Ave
White Plains, NY 10605

Mailing address

985640 Nebraska Medical Ctr
Omaha, NE 68198-5640

Other practice location 1

985640 Nebraska Medical Ctr
Omaha, NE 68198-5640
Phone (402) 559-2258

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in NY, CT2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20250614000142 NY Practitioner - Orthopedic Surgery 4082965462 Reassigns benefits to 1 organization
I20250614000154 CT Practitioner - Orthopedic Surgery 4082965462 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Orthopedic Surgery
Education
Georgetown University School of Medicine, 2018
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices

Practice addresses (Care Compare)

1 Blachley Rd
Stamford, CT 06902-0002
Phone (212) 774-7598

535 E 70TH St
New York, NY 10021-4823
Phone (646) 797-8471

Hospital & facility affiliations

Procedures performed for Medicare patients

ProcedureNumber of procedures
Lower limb (leg) arthroscopy (minimally invasive joint repair)1-10

National Provider Directory

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

Practice roles

OrganizationSpecialtyStatusNew patients
Ny Society for the Relief of Ruptured & Crippled Maintaining Orthopaedic Surgery CurrentSince Jun 1, 2025 Accepting new patients
Ny Society for the Relief of Ruptured & Crippled Maintaining Orthopaedic Surgery CurrentSince Jun 1, 2025 Accepting new patients

Locations

1 Blachley Rd
Stamford, CT 06902
Phone (203) 276-2277

276 Post Rd W
Westport, CT 06880
Phone (203) 391-2270

535 E 70th St
New York, NY 10021

1133 Westchester Ave
White Plains, NY 10604
Phone (914) 358-9700

Interoperability endpoints

  • FHIR API: https://epicproxy.et0927.epichosted.com/FHIRProxy/api/FHIR/DSTU2
  • FHIR API: https://epicproxy.et0927.epichosted.com/FHIRProxy/api/FHIR/R4/

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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

Hospital & facility affiliations 11

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": "1529280000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1752537600000",
    "number": "1376037895",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "985640 NEBRASKA MEDICAL CTR",
            "city": "OMAHA",
            "state": "NE",
            "postal_code": "681985640"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1133 WESTCHESTE AVE",
            "city": "WHITE PLAINS",
            "state": "NY",
            "postal_code": "10605",
            "telephone_number": "212-606-1000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "985640 Nebraska Medical Ctr",
            "address_purpose": "LOCATION",
            "city": "Omaha",
            "state": "NE",
            "postal_code": "681985640",
            "country_code": "US",
            "telephone_number": "402-559-2258",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "AMIRTHARAJ",
        "first_name": "MARK",
        "middle_name": "JEYASEELAN",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2018-06-18",
        "last_updated": "2025-07-15",
        "certification_date": "2025-07-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "NE",
            "license": "8327",
            "primary": false
        },
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "NY",
            "license": "321558",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in White Plains, NY

Sources for this page

Verify at the official NPI Registry.