Karen R. Ringwald, MD
NPI 1922075084ActiveIndividual· Internal Medicine, Rheumatology· Fort Wayne, IN
Internal Medicine, Rheumatology (MD) in Fort Wayne, Indiana, trained at Medical College of Ohio (class of 1999). Their prescriptions cost Medicare Part D more than their services did: $3,671,373 for 4,367 claims, against $1,377,164 paid for services in 2024. Abbvie Inc. was the largest of 10 companies reporting payments in 2025, $864.85 in all, mostly food and beverage.
Overview
| NPI | 1922075084 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 7, 2006 |
| Last updated in NPPES | Jan 15, 2026 |
| Certified by provider | Jan 15, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | 01055867A | IN |
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 - Rheumatology (IN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 423 |
|---|---|
| Services billed | 135,938 across 30 procedure codes |
| Paid by Medicare | $1,377,164 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,367 · 8,407 30-day fills |
|---|---|
| Patients | 549 |
| Total drug cost | $3,671,373 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Medical College of Ohio |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Rheumatology |
| Telehealth | Offers telehealth |
Medical groups
- American Oncology Partners PAFort Wayne, IN · 391 clinicians
- Lutheran Medical Group LLCFort Wayne, IN · 252 clinicians
Hospital affiliations
- Adams Memorial HospitalDecatur, IN
- Parkview Dekalb HospitalAuburn, IN
- Parkview Huntington HospitalHuntington, IN
- Parkview Regional Medical CenterFort Wayne, IN
- Parkview Wabash Hospital, IncWabash, IN
Industry payments (Open Payments)
- 2025$864.85 · 43 payments from 10 companies
- 2024$583.43 · 31 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $386.37 | 25 |
| Janssen Biotech, Inc. | $185.38 | 3 |
| Amgen Inc. | $97.48 | 6 |
| Ucb, Inc. | $47.72 | 2 |
| Astrazeneca Pharmaceuticals LP | $43.41 | 2 |
What the 2025 payments were for
- Food and Beverage$709.87 · 41 payments
- Education$154.98 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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