David Ansell, M.D.
NPI 1003918004ActiveIndividual· Internal Medicine· Chicago, IL
Internal Medicine (M.D.) in Chicago, Illinois, trained at State University of Ny Upstate Medical University (class of 1978). Their prescriptions cost Medicare Part D more than their services did: $320,354 for 2,096 claims, against $26,869 paid for services in 2024. Genentech USA, Inc. reported $1,545 in payments in 2025, mostly consulting fees.
Overview
| NPI | 1003918004 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 1, 2006 |
| Last updated in NPPES | May 2, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036-060009 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 72 |
|---|---|
| Services billed | 366 across 26 procedure codes |
| Paid by Medicare | $26,869 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,096 · 4,102 30-day fills |
|---|---|
| Patients | 161 |
| Total drug cost | $320,354 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | State University of Ny Upstate Medical University |
|---|---|
| Graduation year | 1978 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Rush University Medical GroupChicago, IL · 1,551 clinicians
Hospital affiliations
- Rush Oak Park HospitalOak Park, IL
- Rush University Medical CenterChicago, IL
Industry payments (Open Payments)
- 2025$1,545 · 1 payment from 1 company
- 2024$24,227 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genentech USA, Inc. | $1,545 | 1 |
What the 2025 payments were for
- Consulting Fee$1,545 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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