Mark S. Zaremba, MD
NPI 1023094273ActiveIndividual· Internal Medicine, Cardiovascular Disease· Laguna Hills, CA
Internal Medicine, Cardiovascular Disease (MD) in Laguna Hills, California, trained at Boston University School of Medicine (class of 1975). Their prescriptions cost Medicare Part D more than their services did: $268,403 for 1,837 claims, against $45,644 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 5 companies reporting payments in 2025, $189.11 in all, mostly food and beverage.
Overview
| NPI | 1023094273 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Dec 20, 2005 |
| Last updated in NPPES | Aug 30, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | G38301 | CA |
| Internal Medicine | 207R00000X | G38301 | 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 - Cardiovascular Disease (Cardiology) (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 78 |
|---|---|
| Services billed | 488 across 21 procedure codes |
| Paid by Medicare | $45,644 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,837 · 4,644 30-day fills |
|---|---|
| Patients | 155 |
| Total drug cost | $268,403 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | Boston University School of Medicine |
|---|---|
| Graduation year | 1975 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Secondary specialties | Internal Medicine |
Hospital affiliations
- Memorialcare Saddleback Medical CenterLaguna Hills, CA
- Providence Mission HospitalMission Viejo, CA
Industry payments (Open Payments)
- 2025$189.11 · 8 payments from 5 companies
- 2024$510.20 · 21 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $72.22 | 3 |
| Novo Nordisk Inc | $41.70 | 2 |
| Azurity Pharmaceuticals, Inc. | $30.98 | 1 |
| Astrazeneca Pharmaceuticals LP | $26.93 | 1 |
| Exact Sciences Corporation | $17.28 | 1 |
What the 2025 payments were for
- Food and Beverage$189.11 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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