Chad Michael Ronholm, M.D.
NPI 1306027909ActiveIndividual· Internal Medicine, Rheumatology· Saint Louis, MO
Internal Medicine, Rheumatology (M.D.) with Clayton Medical Associates PC, practicing in Saint Louis, Missouri. 532 Medicare patients in 2024, $3,074,711 paid; nearly all of their 2,370 Part D prescriptions were generic (91%). Takeda Pharmaceuticals U.S.A., Inc. was the largest of 28 companies reporting payments in 2025, $5,775 in all, mostly food and beverage. Lists Barnes Jewish Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1306027909 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Nov 25, 2007 |
| Last updated in NPPES | Mar 29, 2024 |
| Certified by provider | Mar 29, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | 2010026420 | MO |
| Emergency Medicine, Emergency Medical Services | 207PE0004X | 2010026420 | MO |
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 - Rheumatology (IL); Practitioner - Rheumatology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 532 |
|---|---|
| Services billed | 234,607 across 45 procedure codes |
| Paid by Medicare | $3,074,711 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,370 · 3,651 30-day fills |
|---|---|
| Patients | 479 |
| Total drug cost | $1,141,040 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 2007 |
|---|---|
| Medicare specialty | Rheumatology |
Medical group
- Clayton Medical Associates PCSaint Louis, MO · 5 clinicians
Hospital affiliations
- Barnes Jewish HospitalSaint Louis, MO
- Fayette County HospitalVandalia, IL
- Memorial HospitalBelleville, IL
- Ssm Health St Mary's Hospital - St LouisSaint Louis, MO
- Ssm Health St Mary's Hospital -CentraliaCentralia, IL
Industry payments (Open Payments)
- 2025$5,775 · 257 payments from 28 companies
- 2024$4,082 · 216 payments from 21 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Takeda Pharmaceuticals U.S.A., Inc. | $1,498 | 13 |
| Abbvie Inc. | $816.48 | 43 |
| Janssen Biotech, Inc. | $663.14 | 25 |
| Ucb, Inc. | $524.60 | 24 |
| Amgen Inc. | $454.46 | 41 |
What the 2025 payments were for
- Food and Beverage$4,626 · 250 payments
- Travel and Lodging$1,048 · 5 payments
- Education$100.79 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Rheumatology providers in Saint Louis
- 1770544066
- 1730396532
- 1891774329
- 1114452877
- 1578917464
- 1043222706
- 1356830830
- 1245258946
- 1063507531
- 1891140992
- 1821619651
- 1669425989