Ann Mohrbacher, M.D.
NPI 1275578957ActiveIndividual· Internal Medicine, Hematology & Oncology· Los Angeles, CA
Internal Medicine, Hematology & Oncology (M.D.) in Los Angeles, California, trained at Harvard Medical School (class of 1987). Their prescriptions cost Medicare Part D more than their services did: $2,784,355 for 301 claims, against $71,690 paid for services in 2024. Janssen Biotech, Inc. was the largest of 29 companies reporting payments in 2025, $4,543 in all, mostly food and beverage.
Overview
| NPI | 1275578957 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 18, 2006 |
| Last updated in NPPES | Nov 27, 2023 |
| Certified by provider | Sep 7, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | G76827 | CA |
| Internal Medicine, Hematology | 207RH0000X | G76827 | 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 - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 219 |
|---|---|
| Services billed | 955 across 22 procedure codes |
| Paid by Medicare | $71,690 |
Part D prescriptions in 2024
| Prescriptions (claims) | 301 · 353 30-day fills |
|---|---|
| Patients | 61 |
| Total drug cost | $2,784,355 |
| Generic share | 57% of claims |
Education and affiliations
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 1987 |
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- Usc Care Medical Group IncLos Angeles, CA · 1,380 clinicians
Hospital affiliations
- Bakersfield Memorial HospitalBakersfield, CA
- Keck Hospital of UscLos Angeles, CA
- Usc Verdugo Hills HospitalGlendale, CA
Industry payments (Open Payments)
- 2025$4,543 · 135 payments from 29 companies
- 2024$2,880 · 99 payments from 22 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $806.15 | 16 |
| Novartis Pharmaceuticals Corporation | $501.89 | 22 |
| Secura Bio, Inc. | $485.76 | 5 |
| Beone Medicines USA, Inc. | $379.88 | 10 |
| Adc Therapeutics America, Inc. | $356.25 | 3 |
What the 2025 payments were for
- Food and Beverage$4,543 · 135 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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