Susan M. O'Brien, M.D.
NPI 1669577276ActiveIndividual· Internal Medicine, Medical Oncology· Orange, CA
Internal Medicine, Medical Oncology (M.D.) with Uc Regents, practicing in Orange, California. Their prescriptions cost Medicare Part D more than their services did: $1,909,728 for 180 claims, against $12,089 paid for services in 2024. Eli Lilly and Company was the largest of 12 companies reporting payments in 2025, $47,527 in all, mostly consulting fees. Lists Eisenhower Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1669577276 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 14, 2006 |
| Last updated in NPPES | Jun 6, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | H3130 | TX |
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 - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 85 |
|---|---|
| Services billed | 264 across 10 procedure codes |
| Paid by Medicare | $12,089 |
Part D prescriptions in 2024
| Prescriptions (claims) | 180 · 213 30-day fills |
|---|---|
| Patients | 25 |
| Total drug cost | $1,909,728 |
| Generic share | 21% of claims |
Education and affiliations
| Graduation year | 1980 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Uc RegentsOrange, CA · 319 clinicians
Hospital affiliations
- Eisenhower Medical CenterRancho Mirage, CA
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$47,527 · 39 payments from 12 companies
- 2024$44,387 · 42 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Eli Lilly and Company | $8,400 | 2 |
| Abbvie Inc. | $8,375 | 10 |
| Astrazeneca Pharmaceuticals LP | $5,030 | 4 |
| E.R. Squibb & Sons, L.L.C. | $4,360 | 5 |
| Genentech USA, Inc. | $4,166 | 4 |
What the 2025 payments were for
- Consulting Fee$41,215 · 21 payments
- Honoraria$4,000 · 1 payment
- Food and Beverage$1,412 · 16 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$900.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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