DR. ALLISON MARGOLD OSTROFF (M.D.) – Internal Medicine Physician, NPI 1720262397
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
131 GERIATRIC MEDICINE in CT
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Provider Addresses for DR. ALLISON MARGOLD OSTROFF (M.D.)
75, Holly Hill Lane, Greenwich, Fairfield County, Connecticut, 06830, United States
GREENWICH, CT 068306098
Phone: (203) 869-6960
Fax: (203) 869-5103
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2010-09-16
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20100916000340 | I | Geriatric Medicine | CT | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 95 | 65 | $0 |
| G2212 | Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or | 67 | 35 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 52 | 44 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 52 | 39 | $0 |
| 36415 | Insertion of needle into vein for collection of blood sample | 50 | 39 | $0 |
Insurance plans in this area (ZIP 06830)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | CT | |
| Nurse Practitioner | CT | |
| Nurse Practitioner | CT | |
| Nurse Practitioner | CT | |
| Internal Medicine | CT | |
| Nurse Practitioner | MO | |
| Nurse Practitioner | CT | |
| Nurse Practitioner | CT | |
| Nurse Practitioner | CT | |
| Nurse Practitioner | NY |
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