Charles Benjamin Rives, M.D.
NPI 1083057814ActiveIndividual· Internal Medicine, Gastroenterology· Waco, TX
Internal Medicine, Gastroenterology (M.D.) in Waco, Texas, trained at University of Texas Medical School at San Antonio (class of 2013). Their prescriptions cost Medicare Part D more than their services did: $142,659 for 1,061 claims, against $65,327 paid for services in 2024. Phathom Pharmaceuticals, Inc. was the largest of 13 companies reporting payments in 2025, $1,365 in all, mostly food and beverage.
Overview
| NPI | 1083057814 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 11, 2013 |
| Last updated in NPPES | Jun 19, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | S0217 | TX |
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 - Gastroenterology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 294 |
|---|---|
| Services billed | 611 across 41 procedure codes |
| Paid by Medicare | $65,327 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,061 · 1,569 30-day fills |
|---|---|
| Patients | 444 |
| Total drug cost | $142,659 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | University of Texas Medical School at San Antonio |
|---|---|
| Graduation year | 2013 |
| Medicare specialty | Gastroenterology |
Medical group
- Waco Gastroenterology AssociatesWaco, TX · 15 clinicians
Hospital affiliations
Industry payments (Open Payments)
- 2025$1,365 · 56 payments from 13 companies
- 2024$1,423 · 69 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Phathom Pharmaceuticals, Inc. | $342.67 | 28 |
| Enterra Medical, Inc. | $230.16 | 2 |
| Abbvie Inc. | $203.15 | 7 |
| Genzyme Corporation | $157.25 | 4 |
| Boston Scientific Corporation | $149.34 | 1 |
What the 2025 payments were for
- Food and Beverage$1,365 · 56 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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