Allison Margold Ostroff, M.D.
Internal Medicine Physician · Greenwich, CT
Allison Margold Ostroff, M.D. is an internal medicine physician with a practice address in Greenwich, Connecticut, and NPI 1720262397, issued on Dec 19, 2007. Check the license (Connecticut 048433, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Allison Margold Ostroff
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 048433 CT
Self-reported in NPPES; status is on the state search - Practice location
- 75 Holly Hill LN, Greenwich, CT 06830
- Phone
- (203) 869-6960
- Enumerated
- Dec 19, 2007
- Record last updated
- Jan 10, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (203) 869-5103
- Medicare enrollment
- Enrolled (PECOS I20100916000340); accepts Medicare assignment
- Medical or professional school
- Albert Einstein College Of Medicine Of Yeshiva University, 2005
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 75 Holly Hill LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anthony Alleva, MDInternal Medicine Physician1518938778
- Steven BennettProfessional Counselor1174048748
- Nicholas Browning, M.D.Internal Medicine Physician1003095050
- Michael Carney, DPTPhysical Therapist1649031337
- Danielle CheryRegistered Nurse1730995325
- Seagda CoyleMarriage & Family Therapist1942041108
Verify Allison Margold Ostroff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 048433Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% more Medicare Part D claims than the average internal medicine physician in 2024
6,123 Medicare Part D claims for 258 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 182 claims were for opioids.
Most prescribed
- Eliquis320 claims
- Levothyroxine Sodium282 claims
- Atorvastatin Calcium248 claims
- Furosemide224 claims
- Amlodipine Besylate208 claims
- Trazodone Hcl195 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 94.2 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Quotidian Health LLCSandy Hook, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Allison Margold Ostroff among 2,623 internal medicine physician records in Connecticut
Allison Margold Ostroff, M.D. is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 44% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2005 · median 2004 among the 1,646 with a school on file
- Record last updated2017 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
54 internal medicine physician records list a practice address in Greenwich
They are 54 of the 1,184 NPPES records with a practice address in Greenwich, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Greenwich → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Anthony Alleva, MDGreenwich, CT 068301518938778
- Joseph Andrews, M.D.Greenwich, CT 068301740280411
- Allen Chodock, MDGreenwich, CT 068301811928138
- John Delvecchio, MDGreenwich, CT 068301619990868
- Stephen Jones, M.D.Greenwich, CT 068301174547038
- Ellika Mardh, M.D.Greenwich, CT 068301235150145
- Mohammad Reza Moienafshari, M.D.Greenwich, CT 068301154396893
- Marcelyn Molloy, MDGreenwich, CT 068301053301358
Common questions
What is Allison Margold Ostroff, M.D.'s NPI number?
Allison Margold Ostroff, M.D.'s National Provider Identifier (NPI) is 1720262397, issued on Dec 19, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Allison Margold Ostroff, M.D. located?
The NPPES record lists a practice address at 75 Holly Hill LN, Greenwich, CT, 06830. Phone: (203) 869-6960. Providers update this record themselves, so call before visiting.
How can I verify Allison Margold Ostroff, M.D.'s license?
NPPES lists Connecticut license number 048433, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Allison Margold Ostroff, M.D. prescribe under Medicare Part D?
In 2024, Allison Margold Ostroff, M.D. had 6,123 Medicare Part D claims for 258 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Allison Margold Ostroff, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.2 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.