NPIMap

Individual provider Active NPI

Neil Stuart Horowitz, MD

  • Obstetrics & Gynecology Physician
  • Boston, MA
National Provider Identifier
1629050919
Registry record updated Dec 10, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Obstetrics & Gynecology PhysicianTaxonomy code 207V00000X
License
217409 Issued in MA
Practice address
75 Francis St
Brigham and Women's Hospital
Boston, MA 02115-6110
Phone
(617) 732-8843
Fax
(617) 738-5124
NPI assigned
Nov 14, 2005
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Dec 10, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Obstetrics & Gynecology Physician 207V00000X 217409 MA Primary
Gynecologic Oncology Physician 207VX0201X 217409 MA

Addresses

Primary practice location

75 Francis St
Brigham and Women's Hospital
Boston, MA 02115-6110

Mailing address

111 Cypress St
Brookline, MA 02445-6002
Phone (857) 307-0896

Other practice location 1

14 Prospect St
Milford, MA 01757-3003
Phone (508) 473-1190

Other identifiers 3

IdentifierTypeStateIssuer
2011026MedicaidMA
217409OtherMATUFTS HEALTH PLAN
J26246OtherMABCBS MA

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MA
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
I20070824000146 MA Practitioner - Gynecological Oncology 8123110996 Reassigns benefits to 6 organizations

Care Compare profile

Medicare Care Compare
Specialty
Gynecological Oncology
Education
Duke University School of Medicine, 1996
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Umass Memorial Medical Group IncGroup PAC ID 4284539891, 2,494 clinicians

Practice addresses (Care Compare)

100 Medway Rd
Milford, MA 01757-2923

14 Prospect St
Milford, MA 01757-3003
Phone (508) 473-1190

450 Brookline Ave
Boston, MA 02215-5418
Phone (617) 632-3586

450 Brookline Ave
Boston, MA 02215-5450

75 Francis St
Boston, MA 02115-6110
Phone (617) 732-5500

Hospital & facility affiliations

Procedures performed for Medicare patients

ProcedureNumber of procedures
Removal of the uterus31

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
217409MAMDGynecologic Oncology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Milford Regional Physician Group, Inc. Obstetrics & Gynecology Current Accepting new patients
Umass Memorial Medical Group Inc Obstetrics & Gynecology Current Accepting new patients
Milford Regional Physician Group, Inc. CurrentSince Jul 26, 2003 Accepting new patients
The General Hospital Corporation CurrentSince Nov 14, 2025 Accepting new patients
Massachusetts General Physicians Organization Inc Obstetrics & Gynecology CurrentSince Nov 14, 2025 Accepting new patients
Milford Regional Physician Group, Inc. CurrentSince Jul 26, 2003 Accepting new patients
Brigham and Women's Hospital Current Accepting new patients
Umass Memorial Medical Group, Inc. CurrentSince Oct 1, 2025 Accepting new patients
Brigham & Womens Hospital, Inc. Past Accepting new patients
Brigham and Womens Physicians Organization Inc Past Accepting new patients
Dana-Farber Cancer Institute, Inc. Past Accepting new patients

Locations

75 Francis St
Boston, MA 02115

55 Fruit St
Boston, MA 02114

55 Fruit St
#2
Boston, MA 02114
Phone (617) 726-2967

68A Main St
Ste 101
Medway, MA 02053
Phone (508) 533-6020

9 Industrial Rd
Ste 5
Milford, MA 01757
Phone (508) 473-1480

14 Prospect St
Milford, MA 01757
Phone (508) 422-2343

100 Medway Rd
Ste 401
Milford, MA 01757
Phone (508) 634-7338

55 Lake Ave N
Worcester, MA 01655
Phone 508334100048862

Interoperability endpoints

  • Direct secure messaging: horowitz.neils.bwh@direct.partners.masshiway.net

Organizations & group practices 13

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.

View all 13

Hospital & facility affiliations 5

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": "1131926400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1765324800000",
    "number": "1629050919",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "111 CYPRESS ST",
            "city": "BROOKLINE",
            "state": "MA",
            "postal_code": "024456002",
            "telephone_number": "857-307-0896"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "75 FRANCIS ST",
            "address_2": "BRIGHAM AND WOMEN'S HOSPITAL",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021156110",
            "telephone_number": "617-732-8843",
            "fax_number": "617-738-5124"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "14 Prospect St",
            "address_purpose": "LOCATION",
            "city": "Milford",
            "state": "MA",
            "postal_code": "017573003",
            "country_code": "US",
            "telephone_number": "508-473-1190",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HOROWITZ",
        "first_name": "NEIL",
        "middle_name": "STUART",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-11-14",
        "last_updated": "2025-12-10",
        "certification_date": "2025-12-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "MA",
            "license": "217409",
            "primary": true
        },
        {
            "code": "207VX0201X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology, Gynecologic Oncology",
            "state": "MA",
            "license": "217409",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "2011026",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "TUFTS HEALTH PLAN",
            "identifier": "217409",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BCBS MA",
            "identifier": "J26246",
            "state": "MA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Boston, MA

Sources for this page

Verify at the official NPI Registry.