Patrick Dennis Schaffer, DO
NPI 1487117107ActiveIndividual· Internal Medicine· Dublin, OH
Internal Medicine (DO) with Riverside Nephrology Associates Inc, practicing in Dublin, Ohio. 149 Medicare patients in 2024, $44,348 paid; nearly all of their 200 Part D prescriptions were generic (91%). Novo Nordisk Inc was the largest of 3 companies reporting payments in 2025, $88.78 in all, mostly food and beverage. Lists Doctors Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1487117107 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Apr 9, 2019 |
| Last updated in NPPES | Nov 29, 2021 |
| Certified by provider | Nov 29, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 34.015449 | OH |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 (OH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 149 |
|---|---|
| Services billed | 429 across 18 procedure codes |
| Paid by Medicare | $44,348 |
Part D prescriptions in 2024
| Prescriptions (claims) | 200 · 315 30-day fills |
|---|---|
| Patients | 63 |
| Total drug cost | $12,234 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Nephrology |
Medical group
- Riverside Nephrology Associates IncDelaware, OH · 22 clinicians
Hospital affiliations
- Doctors HospitalColumbus, OH
- Dublin Methodist HospitalDublin, OH
- Grady Memorial HospitalDelaware, OH
- Memorial HospitalMarysville, OH
- Riverside Methodist HospitalColumbus, OH
Other facilities
- Concerto OhioDialysis facility · South Euclid, OH
- Davita Columbus West DialysisDialysis facility · Columbus, OH
Industry payments (Open Payments)
- 2025$88.78 · 4 payments from 3 companies
- 2024$147.59 · 6 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $43.06 | 2 |
| Bayer Healthcare Pharmaceuticals Inc. | $26.97 | 1 |
| Ardelyx, Inc. | $18.75 | 1 |
What the 2025 payments were for
- Food and Beverage$88.78 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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