Dr Allison Margold Ostroff, MD - Medicare Geriatric Medicine in Greenwich, CT

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Dr Allison Margold Ostroff, MD is a medicare enrolled "Internal Medicine" physician in Greenwich, Connecticut. She went to Albert Einstein College Of Medicine Of Yeshiva University and graduated in 2005 and has 19 years of diverse experience with area of expertise as Geriatric Medicine. She is a member of the group practice Geriatric Professional Group Llc and her current practice location is 75 Holly Hill Ln, Greenwich, Connecticut. You can reach out to her office (for appointments etc.) via phone at (203) 869-6960.

Dr Allison Margold Ostroff is licensed to practice in Connecticut (license number 048433) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1720262397.

Contact Information

Dr Allison Margold Ostroff, MD
75 Holly Hill Ln,
Greenwich, CT 06830-6098
(203) 869-6960
(203) 869-5103

Map and Direction




Physician's Profile

Full NameDr Allison Margold Ostroff
GenderFemale
SpecialityGeriatric Medicine
Experience19 Years
Location75 Holly Hill Ln, Greenwich, Connecticut
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr Allison Margold Ostroff attended and graduated from Albert Einstein College Of Medicine Of Yeshiva University in 2005
  NPI Data:
  • NPI Number: 1720262397
  • Provider Enumeration Date: 12/19/2007
  • Last Update Date: 01/10/2017
  Medicare PECOS Information:
  • PECOS PAC ID: 5395860126
  • Enrollment ID: I20100916000340

Medical Identifiers

Medical identifiers for Dr Allison Margold Ostroff such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1720262397NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0300XInternal Medicine - Geriatric Medicine 048433 (Connecticut)Secondary
207R00000XInternal Medicine 048433 (Connecticut)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Friedman Home Care And Chaifez Family HospiceBridgeport, CTHospice
Jewish Senior ServicesBridgeport, CTNursing home

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Geriatric Professional Group Llc86289731124

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr Allison Margold Ostroff allows following entities to bill medicare on her behalf.
Entity NameGeriatric Professional Group Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1932295953
PECOS PAC ID: 8628973112
Enrollment ID: O20031208000180

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr Allison Margold Ostroff is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr Allison Margold Ostroff, MD
75 Holly Hill Ln,
Greenwich, CT 06830-6098

Ph: (203) 869-6960		Dr Allison Margold Ostroff, MD
75 Holly Hill Ln,
Greenwich, CT 06830-6098

Ph: (203) 869-6960

Reviews and Comments


Internal Medicine Doctors in Greenwich, CT

Dr. Nicholas Harrison Browning, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 75 Holly Hill Ln, Greenwich, CT 06830
Phone: 203-863-3400    
Francesca Montanari, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 77 Lafayette Pl, Greenwich, CT 06830
Phone: 203-863-3700    
Dr. Lisa Kurian, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 75 Holly Hill Ln, Greenwich, CT 06830
Phone: 203-869-6960    Fax: 203-869-5103
Dr. Steven Smith, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 5 Perryridge Rd, Greenwich, CT 06830
Phone: 203-863-3911    
Dr. Marcelyn Carol Molloy, MD
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 75 Holly Hill Ln, Greenwich, CT 06830
Phone: 203-869-6960    Fax: 203-869-5103
Dr. Alexander Delvecchio, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 55 Holly Hill Ln, Suite 240, Greenwich, CT 06830
Phone: 203-863-4210    Fax: 203-622-1872
Dr. Sunil Rana, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 49 Lake Ave Ste 2, Greenwich, CT 06830
Phone: 203-869-7704    Fax: 203-661-8596

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.