Mariana Rivera Bigham, MD
NPI 1447719547ActiveIndividual· Internal Medicine· Kissimmee, FL
Internal Medicine (MD) in Kissimmee, Florida, trained at Mercer University School of Medicine (class of 2019). Their prescriptions cost Medicare Part D more than their services did: $541,363 for 5,402 claims, against $64,484 paid for services in 2024. Salix Pharmaceuticals, A Division of Bausch Health US, LLC was the largest of 4 companies reporting payments in 2025, $75.72 in all, mostly food and beverage.
Overview
| NPI | 1447719547 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 18, 2019 |
| Last updated in NPPES | Sep 17, 2025 |
| Certified by provider | Sep 17, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 77311-20 | WI |
| Internal Medicine | 207R00000X | ME174684 | FL |
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 - Internal Medicine (FL); Practitioner - Internal Medicine (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 326 |
|---|---|
| Services billed | 1,134 across 57 procedure codes |
| Paid by Medicare | $64,484 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,402 · 11,471 30-day fills |
|---|---|
| Patients | 508 |
| Total drug cost | $541,363 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | Mercer University School of Medicine |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | Internal Medicine |
Medical group
- Orlando Physicians Network IncWindermere, FL · 232 clinicians
Hospital affiliations
- Orlando HealthOrlando, FL
- Orlando Health St Cloud HospitalSaint Cloud, FL
- Ssm Health St Mary's Hospital - MadisonMadison, WI
Other facilities
- Oak Park Place of NakomaNursing home · Madison, WI
Industry payments (Open Payments)
- 2025$75.72 · 4 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $20.01 | 1 |
| Novo Nordisk Inc | $20.00 | 1 |
| Amgen Inc. | $19.03 | 1 |
| Pfizer Inc. | $16.68 | 1 |
What the 2025 payments were for
- Food and Beverage$75.72 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 121 internal medicine physicians in Kissimmee · All internal medicine physicians in Florida