Active NPI
Allison Margold Ostroff, M.D.
- Internal Medicine Physician
- Greenwich, CT
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Internal Medicine Physician
- License
- 048433
- 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
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| 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
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
Enrollment records 1
Care Compare profile
Medicare Care Compare- Specialty
- Geriatric Medicine
- Education
- Albert Einstein College of Medicine of Yeshiva University, 2005
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
139 Toddy Hill Rd
Sandy Hook, CT 06482-1362
Phone (607) 303-9318
Hospital & facility affiliations
- Mozaic Hospice
- Mozaic Senior Life
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Geriatric Professional Group, LLC | Internal Medicine | Current | Accepting new patients |
| Quotidian Health LLC | Internal Medicine | Current | Accepting new patients |
| Southbury Medical Associates, LLP | Internal Medicine | Past | 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.
| Facility | Type | Role | Since |
|---|---|---|---|
| Mozaic Senior Life | 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.
-
- Skilled Nursing Facility
- Bridgeport, CT
- NPI 1083602346
Adp of the SNF, Operational/Managerial Control
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.
-
- Internal Medicine Physician
- Sharon, CT
- NPI 1184098295
-
- Internal Medicine Physician
- Bridgeport, CT
- NPI 1932295953
-
- Internal Medicine Physician
- Southbury, CT
- NPI 1407984222
Hospital & facility affiliations 2
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- Skilled Nursing Facility
- Bridgeport, CT
- NPI 1083602346
Nursing home
-
- Community Based Hospice Care Agency
- Bridgeport, CT
- NPI 1518107960
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
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 10, 2017; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; facility enrollments, owners and changes of ownership; Provider of Services certification data; 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.