Kay Negishi

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

273937 Issued in MA

Practice address

1743 Sidewinder Drive
Unit 114
Park City, UT 84060

Phone

(307) 840-9834

Fax

(833) 450-0933

NPI assigned

May 8, 2015

Sex

Female

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in MA, TX, CO, UT4 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 4

Specialty

HospitalistAlso: Internal Medicine

Education

Pennsylvania State University College of Medicine, 2015

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Massachusetts General Physicians Organization IncGroup PAC ID 2466365820, 3,494 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Massachusetts General Hospital Hospital, Boston, MA, CCN 220071

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: kay.negishi.1@30093.direct.athenahealth.com
• Direct secure messaging: negishi.kay.mgh@direct.partners.masshiway.net

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.

• Massachusetts General Physicians Organization Inc

  • Dermatology Physician
  • Boston, MA
  • NPI 1801874573

  Internal Medicine

  Medicare reassignment Care Compare group NPD
• Emerald Medical Practice PC

  • Specialist
  • Park City, UT
  • NPI 1447011267

  CO

  Medicare reassignment NPD
• Brigham & Womens Physicians Organization Inc

  • Internal Medicine Physician
  • Boston, MA
  • NPI 1033535497
  Medicare reassignment NPD
• Cambridge Public Health Commission

  • General Acute Care Hospital
  • Cambridge, MA
  • NPI 1932313228
  Medicare reassignment NPD
• DHHS, PHS, Naihs, Shiprock Hospital

  • General Acute Care Hospital
  • Shiprock, NM
  • NPI 1780639971

  TX

  Medicare reassignment NPD
• Rosebud Indian Health Service

  • General Acute Care Hospital
  • Rosebud, SD
  • NPI 1194757369

  TX

  Medicare reassignment NPD
• The General Hospital Corporation

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1023049236
  Medicare reassignment NPD
• DHHS, PHS, Naihs, Shiprock Hospital

  • General Acute Care Hospital
  • Teecnospos, AZ
  • NPI 1477615789
  NPD
• General Hospital Corp

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1508390014
  NPD
• Rosebud Indian Health Service

  • Ambulatory Surgical Clinic/Center
  • Rosebud, SD
  • NPI 1790955128
  NPD
• Brigham and Womens Physicians Organization Inc

  • Diagnostic Radiology Physician
  • Boston, MA
  • NPI 1265464598
  NPD (past)
• Cloud Health Medical Group, P.a.

  • Internal Medicine Physician
  • White Plains, NY
  • NPI 1528744935
  NPD (past)

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

• The General Hospital Corporation

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1023049236
  Care Compare affiliation

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

{
    "created_epoch": "1431043200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1767052800000",
    "number": "1194103309",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "55 FRUIT ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021142621",
            "telephone_number": "617-726-2000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1743 SIDEWINDER DRIVE",
            "address_2": "UNIT 114",
            "city": "PARK CITY",
            "state": "UT",
            "postal_code": "84060",
            "telephone_number": "307-840-9834",
            "fax_number": "833-450-0933"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "55 Fruit St",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021142621",
            "country_code": "US",
            "telephone_number": "617-726-2000",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1153 Centre St",
            "address_purpose": "LOCATION",
            "city": "Jamaica Plain",
            "state": "MA",
            "postal_code": "021303446",
            "country_code": "US",
            "telephone_number": "617-983-7000",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "75 Francis St",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021156110",
            "country_code": "US",
            "telephone_number": "617-732-5500",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "NEGISHI",
        "first_name": "KAY",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2015-05-08",
        "last_updated": "2025-12-30",
        "certification_date": "2025-12-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MA",
            "license": "273937",
            "primary": true
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "MA",
            "license": "273937",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Neva Therapies
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• Viet Nguyen, M.D.

• Internal Medicine Physician in Park City, UT
• Providers in Park City, UT by specialty
• Internal Medicine Physician in Utah

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 30, 2025; 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.