Christopher Eduard Sonntag, MD
NPI 1417454620ActiveIndividual· Internal Medicine, Rheumatology· Fayetteville, AR
Internal Medicine, Rheumatology (MD) in Fayetteville, Arkansas, trained at University of Arkansas College of Medicine (class of 2018). Their prescriptions cost Medicare Part D more than their services did: $1,434,273 for 2,022 claims, against $31,248 paid for services in 2024. Abbvie Inc. was the largest of 19 companies reporting payments in 2025, $26,525 in all, mostly speaking and faculty fees.
Overview
| NPI | 1417454620 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Apr 12, 2018 |
| Last updated in NPPES | Dec 23, 2024 |
| Certified by provider | Dec 23, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | E-17047 | AR |
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 (AR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 116 |
|---|---|
| Services billed | 385 across 15 procedure codes |
| Paid by Medicare | $31,248 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,022 · 3,193 30-day fills |
|---|---|
| Patients | 225 |
| Total drug cost | $1,434,273 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | University of Arkansas College of Medicine |
|---|---|
| Graduation year | 2018 |
| Medicare specialty | Internal Medicine |
Medical group
- Washington Regional Medical SystemFayetteville, AR · 238 clinicians
Hospital affiliation
- Washington Regional Medical CenterFayetteville, AR
Industry payments (Open Payments)
- 2025$26,525 · 165 payments from 19 companies
- 2024$2,619 · 156 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $22,807 | 67 |
| Janssen Biotech, Inc. | $1,888 | 5 |
| Amgen Inc. | $695.46 | 42 |
| Ucb, Inc. | $291.91 | 18 |
| Mallinckrodt Hospital Products Inc. | $211.43 | 7 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$17,425 · 8 payments
- Travel and Lodging$4,237 · 9 payments
- Food and Beverage$3,049 · 146 payments
- Consulting Fee$1,800 · 1 payment
- Education$13.17 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Rheumatology providers in Fayetteville
- 1326332461
- 1386868545
- 1770519670
- 1093031940
- 1154306603