Marco A. Paez, M.D.
NPI 1902167695ActiveIndividual· Internal Medicine, Gastroenterology· Corona, CA
Internal Medicine, Gastroenterology (M.D.) in Corona, California, trained at Georgetown University School of Medicine (class of 2012). Their prescriptions cost Medicare Part D more than their services did: $100,573 for 524 claims, against $50,747 paid for services in 2024. Madrigal Pharmaceuticals was the largest of 9 companies reporting payments in 2025, $893.95 in all, mostly food and beverage.
Overview
| NPI | 1902167695 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | May 30, 2012 |
| Last updated in NPPES | Jan 12, 2021 |
| Certified by provider | Jan 12, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A154078 | 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 - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 187 |
|---|---|
| Services billed | 448 across 39 procedure codes |
| Paid by Medicare | $50,747 |
Part D prescriptions in 2024
| Prescriptions (claims) | 524 · 755 30-day fills |
|---|---|
| Patients | 287 |
| Total drug cost | $100,573 |
| Generic share | 75% of claims |
Education and affiliations
| Medical school | Georgetown University School of Medicine |
|---|---|
| Graduation year | 2012 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- United Medical DoctorsMurrieta, CA · 173 clinicians
Hospital affiliation
- Riverside Community HospitalRiverside, CA
Industry payments (Open Payments)
- 2025$893.95 · 34 payments from 9 companies
- 2024$574.91 · 18 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $665.14 | 23 |
| Pfizer Inc. | $79.21 | 3 |
| Ardelyx, Inc. | $44.68 | 2 |
| Abbvie Inc. | $26.96 | 1 |
| Novo Nordisk Inc | $23.31 | 1 |
What the 2025 payments were for
- Food and Beverage$893.95 · 34 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Gastroenterology providers in Corona
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- 1619102837
- 1417226366
All Internal Medicine, Gastroenterology providers in California →