Hussein Merza, MD
NPI 1235409673ActiveIndividual· Internal Medicine, Hematology & Oncology· Corona, CA
Internal Medicine, Hematology & Oncology (MD) with Southern California Permanente Medical Group, practicing in Corona, California. Their prescriptions cost Medicare Part D more than their services did: $1,093,205 for 281 claims, against $35,879 paid for services in 2024. Alexion Pharmaceuticals, Inc. was the largest of 4 companies reporting payments in 2025, $102.60 in all, mostly food and beverage. Lists Kaiser Foundation Hospital Fontana/Ontario as a hospital affiliation.
Overview
| NPI | 1235409673 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 3, 2012 |
| Last updated in NPPES | May 27, 2025 |
| Certified by provider | Sep 24, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | A168484 | CA |
| Internal Medicine, Hematology | 207RH0000X | A168484 | 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 - Medical Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 80 |
|---|---|
| Services billed | 992 across 23 procedure codes |
| Paid by Medicare | $35,879 |
Part D prescriptions in 2024
| Prescriptions (claims) | 281 · 350 30-day fills |
|---|---|
| Patients | 90 |
| Total drug cost | $1,093,205 |
Education and affiliations
| Graduation year | 2007 |
|---|---|
| Medicare specialty | Medical Oncology |
| Secondary specialties | Hematology/Oncology, Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Southern California Permanente Medical GroupRedlands, CA · 11,293 clinicians
Hospital affiliation
- Kaiser Foundation Hospital Fontana/OntarioFontana, CA
Industry payments (Open Payments)
- 2025$102.60 · 4 payments from 4 companies
- 2024$762.87 · 33 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alexion Pharmaceuticals, Inc. | $34.79 | 1 |
| Abbvie Inc. | $27.57 | 1 |
| Glaxosmithkline, LLC. | $21.20 | 1 |
| Beigene USA, Inc. | $19.04 | 1 |
What the 2025 payments were for
- Food and Beverage$102.60 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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