Willis G. Parsons, M.D.
NPI 1972578698ActiveIndividual· Internal Medicine, Gastroenterology· Arlington Heights, IL
Internal Medicine, Gastroenterology (M.D.) in Arlington Heights, Illinois, trained at Vanderbilt University School of Medicine (class of 1989). In 2024 Medicare paid $262,615 for 856 patients, and Part D covered 550 of their prescriptions, 82% of them generic. Fujifilm Healthcare Americas Corporation was the largest of 20 companies reporting payments in 2025, $47,935 in all, mostly consulting fees.
Overview
| NPI | 1972578698 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 17, 2006 |
| Last updated in NPPES | May 10, 2021 |
| Certified by provider | May 10, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 036090940 | 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 | 856 |
|---|---|
| Services billed | 2,041 across 90 procedure codes |
| Paid by Medicare | $262,615 |
Part D prescriptions in 2024
| Prescriptions (claims) | 550 · 948 30-day fills |
|---|---|
| Patients | 307 |
| Total drug cost | $81,830 |
| Generic share | 82% of claims |
Education and affiliations
| Medical school | Vanderbilt University School of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- Endeavor Health Medical GroupEvanston, IL · 3,350 clinicians
Hospital affiliations
- Morris Hospital & Healthcare CentersMorris, IL
- Northshore University Healthsystem - Evanston HospitalEvanston, IL
- Northwest Community Hospital 1Arlington Heights, IL
Industry payments (Open Payments)
- 2025$47,935 · 43 payments from 20 companies
- 2024$36,228 · 36 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Fujifilm Healthcare Americas Corporation | $23,465 | 5 |
| Cook Incorporated | $22,600 | 2 |
| Cook Medical LLC | $500.70 | 5 |
| Conmed Corporation | $261.40 | 3 |
| Boston Scientific Corporation | $210.09 | 2 |
What the 2025 payments were for
- Consulting Fee$23,200 · 2 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$22,600 · 2 payments
- Food and Beverage$2,135 · 39 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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