Rockford Glenn Yapp, M.D., M.P.H.
NPI 1356327910ActiveIndividual· Internal Medicine, Gastroenterology· Downers Grove, IL
Internal Medicine, Gastroenterology (M.D., M.P.H.) in Downers Grove, Illinois, trained at University of Nebraska College of Medicine (class of 1984). Their prescriptions cost Medicare Part D more than their services did: $858,555 for 1,490 claims, against $118,330 paid for services in 2024. Novo Nordisk Inc was the largest of 31 companies reporting payments in 2025, $159,498 in all, mostly speaking and faculty fees.
Overview
| NPI | 1356327910 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., M.P.H. |
| Sole proprietor | No |
| NPI issued | Dec 15, 2005 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | — | IL |
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 (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 461 |
|---|---|
| Services billed | 1,294 across 59 procedure codes |
| Paid by Medicare | $118,330 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,490 · 3,250 30-day fills |
|---|---|
| Patients | 492 |
| Total drug cost | $858,555 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | University of Nebraska College of Medicine |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Gi Partners of Illinois PLLCLibertyville, IL · 39 clinicians
Hospital affiliations
- Advocate Good Samaritan HospitalDowners Grove, IL
- Advocate Illinois Masonic Medical CenterChicago, IL
- Edward HospitalNaperville, IL
- Uchicago Medicine Adventhealth HinsdaleHinsdale, IL
Industry payments (Open Payments)
- 2025$159,498 · 231 payments from 31 companies
- 2024$85,174 · 233 payments from 27 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $58,442 | 29 |
| Phathom Pharmaceuticals, Inc. | $29,831 | 31 |
| Madrigal Pharmaceuticals | $27,731 | 37 |
| Lumendi LLC | $25,000 | 1 |
| Ipsen Biopharmaceuticals, Inc | $9,289 | 17 |
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$103,309 · 22 payments
- Grant$25,000 · 1 payment
- Consulting Fee$12,508 · 6 payments
- Travel and Lodging$9,637 · 17 payments
- Food and Beverage$8,932 · 181 payments
- Education$112.74 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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