Tanya B. Dorff, M.D.
NPI 1508879115ActiveIndividual· Internal Medicine, Medical Oncology· Duarte, CA
Internal Medicine, Medical Oncology (M.D.) in Duarte, California, trained at University of California, Geffen School of Medicine (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $6,543,922 for 1,464 claims, against $112,946 paid for services in 2024. Abbvie Inc. was the largest of 11 companies reporting payments in 2025, $18,953 in all, mostly consulting fees.
Overview
| NPI | 1508879115 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 14, 2006 |
| Last updated in NPPES | Mar 7, 2023 |
| Certified by provider | Dec 9, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | A82669 | CA |
| Internal Medicine, Hematology & Oncology | 207RH0003X | A82669 | CA |
| Internal Medicine | 207R00000X | A82669 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Medical Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 517 |
|---|---|
| Services billed | 1,681 across 21 procedure codes |
| Paid by Medicare | $112,946 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,464 · 1,674 30-day fills |
|---|---|
| Patients | 204 |
| Total drug cost | $6,543,922 |
| Generic share | 47% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- City of Hope Medical FoundationDuarte, CA · 982 clinicians
Hospital affiliations
- Eisenhower Medical CenterRancho Mirage, CA
- Loma Linda University Medical CenterLoma Linda, CA
Other facilities
- Progress Home Health Care IncHome health agency · Glendale, CA
Industry payments (Open Payments)
- 2025$18,953 · 23 payments from 11 companies
- 2024$17,615 · 50 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $5,859 | 8 |
| Astrazeneca Pharmaceuticals LP | $4,135 | 2 |
| Blue Earth Diagnostics | $2,600 | 1 |
| Pfizer Inc. | $2,211 | 2 |
| Astellas Pharma Global Development | $2,100 | 1 |
What the 2025 payments were for
- Consulting Fee$17,033 · 6 payments
- Travel and Lodging$973.28 · 3 payments
- Food and Beverage$947.18 · 14 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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