Siamak Stephen Marzban, M.D.
NPI 1164447959ActiveIndividual· Internal Medicine· San Pedro, CA
Internal Medicine (M.D.) in San Pedro, California, licensed in CA, with an NPI issued in July 2006. Their prescriptions cost Medicare Part D more than their services did: $109,340 for 2,126 claims, against $53,173 paid for services in 2024. Lists Providence Little Co of Mary Med Ctr San Pedro and 1 other hospital as hospital affiliations.
Overview
| NPI | 1164447959 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 13, 2006 |
| Last updated in NPPES | Feb 20, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A48221 | 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 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 57 |
|---|---|
| Services billed | 581 across 24 procedure codes |
| Paid by Medicare | $53,173 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,126 · 2,851 30-day fills |
|---|---|
| Patients | 109 |
| Total drug cost | $109,340 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 1979 |
|---|---|
| Medicare specialty | Internal Medicine |
Hospital affiliations
- Providence Little Co of Mary Med Ctr San PedroSan Pedro, CA
- Torrance Memorial Medical CenterTorrance, CA
Other facilities
- Matrix Home HealthHome health agency · Encino, CA
- Moonlight Home Healthcare, IncHome health agency · Burbank, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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