Siamak Saadat, M.D.
NPI 1992018642ActiveIndividual· Internal Medicine, Hematology & Oncology· Colton, CA
Internal Medicine, Hematology & Oncology (M.D.) with City of Hope Medical Foundation, practicing in Colton, California. Their prescriptions cost Medicare Part D more than their services did: $338,567 for 177 claims, against $57,874 paid for services in 2024. Amgen Inc. was the largest of 41 companies reporting payments in 2025, $83,238 in all, mostly speaking and faculty fees. Lists Arrowhead Regional Medical Center as a hospital affiliation.
Overview
| NPI | 1992018642 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 23, 2010 |
| Last updated in NPPES | Nov 5, 2020 |
| Certified by provider | Nov 5, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | A113413 | CA |
| Internal Medicine | 207R00000X | A113413 | CA |
| Internal Medicine, Medical Oncology | 207RX0202X | A113413 | 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 - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 171 |
|---|---|
| Services billed | 765 across 9 procedure codes |
| Paid by Medicare | $57,874 |
Part D prescriptions in 2024
| Prescriptions (claims) | 177 · 211 30-day fills |
|---|---|
| Patients | 44 |
| Total drug cost | $338,567 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 2008 |
|---|---|
| Medicare specialty | Hematology/Oncology |
Medical group
- City of Hope Medical FoundationDuarte, CA · 982 clinicians
Hospital affiliation
- Arrowhead Regional Medical CenterColton, CA
Industry payments (Open Payments)
- 2025$83,238 · 356 payments from 41 companies
- 2024$89,150 · 343 payments from 44 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $39,144 | 39 |
| E.R. Squibb & Sons, L.L.C. | $18,913 | 26 |
| Lilly USA, LLC | $15,608 | 18 |
| Pfizer Inc. | $4,246 | 23 |
| Janssen Biotech, Inc. | $676.03 | 25 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$57,857 · 25 payments
- Consulting Fee$12,215 · 8 payments
- Food and Beverage$6,947 · 305 payments
- Travel and Lodging$6,119 · 17 payments
- Education$99.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records