Margo Estrin, M.D.
NPI 1891840096ActiveIndividual· Internal Medicine· Danville, CA
Internal Medicine (M.D.) in Danville, California, trained at University of Southern California Keck School of Medicine (class of 1978). Their prescriptions cost Medicare Part D more than their services did: $103,414 for 1,843 claims, against $27,480 paid for services in 2024.
Overview
| NPI | 1891840096 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jan 25, 2007 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | G40199 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 133 |
|---|---|
| Services billed | 338 across 5 procedure codes |
| Paid by Medicare | $27,480 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,843 · 3,855 30-day fills |
|---|---|
| Patients | 155 |
| Total drug cost | $103,414 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 1978 |
| Medicare specialty | Internal Medicine |
Hospital affiliations
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
- San Ramon Regional Medical CenterSan Ramon, CA
- Stanford Health Care Tri-ValleyPleasanton, CA
Other facilities
- John Muir Home Health ServicesHome health agency · Concord, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other internal medicine physicians in Danville
- 1033188602
- 1033485958
- 1134272255
- 1184901001
- 1194884502
- 1437261781
- 1760427702
- 1770696056
- 1851437123
- 1508185851
- 1013069236
- 1053375188
All 32 internal medicine physicians in Danville · All internal medicine physicians in California