Individual provider Active NPI

Allison Margold Ostroff, M.D.

  • Internal Medicine Physician
  • Greenwich, CT
National Provider Identifier
1720262397
Registry record updated Jan 10, 2017
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
048433 Issued in CT
Practice address
75 Holly Hill LN
Greenwich, CT 06830-6098
Phone
(203) 869-6960
Fax
(203) 869-5103
NPI assigned
Dec 19, 2007
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jan 10, 2017

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Geriatric Medicine (Internal Medicine) Physician 207RG0300X 048433 CT
Internal Medicine Physician 207R00000X 048433 CT Primary

Addresses

Primary practice location

75 Holly Hill LN
Greenwich, CT 06830-6098

Mailing address

75 Holly Hill LN
Greenwich, CT 06830-6098
Phone (203) 869-6960

Other names 1

  • Dr. Allison Brook Margold Former name

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CT
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 1

Enrollment IDStateProvider typePAC IDDetails
I20100916000340 CT Practitioner - Geriatric MedicinePractitioner - Internal Medicine 5395860126 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Geriatric MedicineAlso: Internal Medicine
Education
Albert Einstein College of Medicine of Yeshiva University, 2005
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Quotidian Health LLCGroup PAC ID 6901105451, 16 clinicians

Practice addresses (Care Compare)

139 Toddy Hill Rd
Sandy Hook, CT 06482-1362
Phone (607) 303-9318

Hospital & facility affiliations

  • Mozaic Hospice Hospice, Bridgeport, CT, CCN 071541
  • Mozaic Senior Life Nursing home, Bridgeport, CT, CCN 075353

National Provider Directory

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

Practice roles

OrganizationSpecialtyStatusNew patients
Geriatric Professional Group, LLC Internal Medicine CurrentSince Oct 1, 2023 Accepting new patients
Quotidian Health LLC Internal Medicine CurrentSince Nov 18, 2024 Accepting new patients
Southbury Medical Associates, LLP Internal Medicine PastSince Oct 25, 2021 Accepting new patients

Locations

4200 Park Ave
Bridgeport, CT 06604
Phone (203) 365-6400

33 Dixwell Ave
New Haven, CT 06511
Phone (800) 805-0759

139 Toddy Hill Rd
Sandy Hook, CT 06482
Phone (203) 364-3110

27 Hospital Hill Rd
Sharon, CT 06069
Phone (607) 303-9318

Ownership & related parties

All facility ownership & control disclosures 1

Facilities whose Medicare enrollment lists this provider’s PECOS associate ID as an owner or managing party.

FacilityTypeRoleSince
Mozaic Senior LifeBridgeport, CT, CCN 075353 Skilled nursing facility Operational/Managerial Control
Adp of the SNF
Oct 2, 2023
Jan 30, 2025

Owned or controlled facilities with NPI records 1

Facilities whose Medicare enrollment lists this provider as an owner, officer, director or managing party.

Organizations & group practices 3

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 2

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": "1198022400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1484006400000",
    "number": "1720262397",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "75 HOLLY HILL LN",
            "city": "GREENWICH",
            "state": "CT",
            "postal_code": "068306098",
            "telephone_number": "203-869-6960",
            "fax_number": "203-869-5103"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "75 HOLLY HILL LN",
            "city": "GREENWICH",
            "state": "CT",
            "postal_code": "068306098",
            "telephone_number": "203-869-6960",
            "fax_number": "203-869-5103"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "OSTROFF",
        "first_name": "ALLISON",
        "middle_name": "MARGOLD",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2007-12-19",
        "last_updated": "2017-01-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0300X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Geriatric Medicine",
            "state": "CT",
            "license": "048433",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CT",
            "license": "048433",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "ALLISON",
            "last_name": "MARGOLD",
            "middle_name": "BROOK",
            "prefix": "DR.",
            "credential": "M.D.",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

Other providers in Greenwich, CT

Sources for this page

Verify at the official NPI Registry.