Ellen Bondar, MD

Primary specialty

Hospitalist PhysicianTaxonomy code 208M00000X

License

218623 Issued in NY

Practice address

1275 York Ave
New York, NY 10065-6007

Phone

(212) 639-2000

NPI assigned

Sep 20, 2006

Last updated

Mar 19, 2026By the provider in NPPES

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Other identifiers 3

Medicare fee-for-service enrollment

Enrolled in NY, AZ, FL3 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 3

Specialty

Internal MedicineAlso: Hospitalist

Education

State University of New York Downstate Medical Center, 1998

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Memorial Urgent Care GroupGroup PAC ID 6507878675, 46 clinicians

MD Ally Services PAGroup PAC ID 9133516743, shared by 2 NPIs, 23 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Memorial Hospital for Cancer and Allied Diseases Hospital, New York, NY, CCN 330154

Merit-based Incentive Payment System (MIPS)

Final score

80.41 of 100Reported as group

Quality

74.7

Improvement activities

40

Cost

69.14

Merit-based Incentive Payment System (MIPS)

Final score

79.13 of 100Reported as group

Quality

61.43

Improvement activities

40

Cost

79.81

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

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

Interoperability endpoints

• Direct secure messaging: ebondar26195@mskcc.direct-ci.com
• Direct secure messaging: ellen.bondar.1@27810.direct.athenahealth.com

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.

• Memorial Urgent Care Group

  • Emergency Medicine Physician
  • New York, NY
  • NPI 1053364539

  Internal Medicine

  Medicare reassignment Care Compare group NPD
• MSK Harrison

  • Medical Oncology Physician
  • West Harrison, NY
  • NPI 1174923593
  Medicare reassignment NPD
• North Shore-Lij Medical PC

  dba NHPP Cardiology at Great Neck

  • Urology Physician
  • Great Neck, NY
  • NPI 1053688572

  Internal Medicine

  Medicare reassignment NPD
• Northern Westchester Hospital Association

  dba Northern Westchester Hospital

  • General Acute Care Hospital
  • Mount Kisco, NY
  • NPI 1912992215
  Medicare reassignment NPD
• MD Ally Services PA

  • Emergency Medicine Physician
  • Miami Lakes, FL
  • NPI 1477218089

  Internal Medicine

  Medicare reassignment NPD
• MD Ally Services PA

  • Emergency Medicine Physician
  • Phoenix, AZ
  • NPI 1932810215
  Medicare reassignment NPD
• Northern Westchester Hospital Association

  • Internal Medicine Physician
  • Mount Kisco, NY
  • NPI 1285891457
  NPD
• Northern Westchester Hospital Association

  dba Northern Westchester Hospital Transitional Care Unit

  • Medicare Defined Swing Bed Hospital Unit
  • Mount Kisco, NY
  • NPI 1396178356
  NPD
• Suny Health Science Center at Brooklyn

  dba Suny DMC@Lich-Emergency Medicine

  • Emergency Medicine Physician
  • Brooklyn, NY
  • NPI 1386942555
  NPD (past)

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

• Memorial Hospital for Cancer and Allied Diseases

  • General Acute Care Hospital
  • New York, NY
  • NPI 1700887411
  Care Compare affiliation
• Ralph Lauren Center for Cancer Care and Prevention

  • Special Hospital
  • New York, NY
  • NPI 1770046351
  Care Compare affiliation
• Memorial Hospital for Cancer & Allied Diseases

  • General Acute Care Hospital
  • Basking Ridge, NJ
  • NPI 1659385474
  Care Compare affiliation
• Memorial Sloan Kettering Bergen

  • General Acute Care Hospital
  • Montvale, NJ
  • NPI 1841650330
  Care Compare affiliation
• Memorial Sloan Kettering Monmouth

  • General Acute Care Hospital
  • Middletown, NJ
  • NPI 1528428521
  Care Compare affiliation

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

{
    "created_epoch": "1158710400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1773878400000",
    "number": "1992803340",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "400 E MAIN ST",
            "city": "MOUNT KISCO",
            "state": "NY",
            "postal_code": "105493417",
            "telephone_number": "914-242-8318",
            "fax_number": "914-666-1965"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1275 YORK AVE",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100656007",
            "telephone_number": "212-639-2000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1101 Marina Village Pkwy Ste 201",
            "address_purpose": "LOCATION",
            "city": "Alameda",
            "state": "CA",
            "postal_code": "945016472",
            "country_code": "US",
            "telephone_number": "203-350-2116",
            "fax_number": "866-326-5428",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "7900 Oak Ln Ste 400",
            "address_purpose": "LOCATION",
            "city": "Miami Lakes",
            "state": "FL",
            "postal_code": "330166001",
            "country_code": "US",
            "telephone_number": "203-350-2116",
            "fax_number": "866-326-5428",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "4600 E Washington St Ste 300",
            "address_purpose": "LOCATION",
            "city": "Phoenix",
            "state": "AZ",
            "postal_code": "850341908",
            "country_code": "US",
            "telephone_number": "203-350-2116",
            "fax_number": "866-326-5428",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "3190 S Vaughn Way Ste 550",
            "address_purpose": "LOCATION",
            "city": "Aurora",
            "state": "CO",
            "postal_code": "800143538",
            "country_code": "US",
            "telephone_number": "203-350-2116",
            "fax_number": "866-326-5428",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "BONDAR",
        "first_name": "ELLEN",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2006-09-20",
        "last_updated": "2026-03-19",
        "certification_date": "2026-03-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NY",
            "license": "218623",
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "NY",
            "license": "218623",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "02229963",
            "state": "NY"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "170942",
            "state": "AZ"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "128068700",
            "state": "FL"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Andrew Richard Bond, M.D.
• Constance SK Bond, MSW
• Pamela Sue Bond, RN
• Rebecca Bond
• Daria Bondar, LMT
• Eric Bondarsky
• Bonded Counseling Collective LLC
• Sheila Bonder-Smith, LCSW
• Jaclyn H. Bonder, M.D.
• Kristy Bondi, PA-C

• Hospitalist Physician in New York, NY
• Providers in New York, NY by specialty
• Hospitalist Physician in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 19, 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.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.