Gerald Simon, MD
NPI 1861450330ActiveIndividual· Internal Medicine· Countryside, IL
Internal Medicine (MD) in Countryside, Illinois, trained at Loyola University of Chicago, Stritch School of Medicine (class of 1982). Their prescriptions cost Medicare Part D more than their services did: $1,581,323 for 14,498 claims, against $349,167 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 21 companies reporting payments in 2025, $1,497 in all, mostly food and beverage.
Overview
| NPI | 1861450330 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 3, 2006 |
| Last updated in NPPES | Feb 1, 2023 |
| Certified by provider | Feb 1, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036066840 | IL |
| Internal Medicine, Geriatric Medicine | 207RG0300X | 36066840 | 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 - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 619 |
|---|---|
| Services billed | 5,710 across 44 procedure codes |
| Paid by Medicare | $349,167 |
Part D prescriptions in 2024
| Prescriptions (claims) | 14,498 · 25,985 30-day fills |
|---|---|
| Patients | 845 |
| Total drug cost | $1,581,323 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | Loyola University of Chicago, Stritch School of Medicine |
|---|---|
| Graduation year | 1982 |
| Medicare specialty | Internal Medicine |
Medical group
- Nani Internal Med LLCWestmont, IL · 5 clinicians
Hospital affiliations
- Advocate Good Samaritan HospitalDowners Grove, IL
- Edward HospitalNaperville, IL
- Uchicago Medicine Adventhealth BolingbrookBolingbrook, IL
- Uchicago Medicine Adventhealth HinsdaleHinsdale, IL
- Uchicago Medicine Adventhealth la GrangeLa Grange, IL
Other facilities
- Advocate Home Health Care ServHome health agency · Oakbrook, IL
- Home Health Advantage, IncHome health agency · Orland Park, IL
- Safe Life Home Health Care, LLCHome health agency · Lombard, IL
- Uchicago Medicine Adventhealth Home CareHome health agency · La Grange, IL
- Advocate HospiceHospice · Oak Brook, IL
- Angels Grace HospiceHospice · Bolingbrook, IL
- Lighthouse Hospice Care LLCHospice · Naperville, IL
- Shirley Ryan AbilitylabInpatient rehabilitation facility · Chicago, IL
- Bella Terra LagrangeNursing home · La Grange, IL
- Burgess Square Healthcare CtrNursing home · Westmont, IL
- Meadowbrook Manor - LagrangeNursing home · La Grange, IL
- Oak TraceNursing home · Downers Grove, IL
- Pearl of Hinsdale, theNursing home · Hinsdale, IL
Industry payments (Open Payments)
- 2025$1,497 · 74 payments from 21 companies
- 2024$1,092 · 56 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $309.66 | 16 |
| Novo Nordisk Inc | $198.56 | 8 |
| Amgen Inc. | $185.00 | 10 |
| Pfizer Inc. | $144.00 | 7 |
| Novartis Pharmaceuticals Corporation | $80.63 | 4 |
What the 2025 payments were for
- Food and Beverage$1,400 · 71 payments
- Education$96.81 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine providers in Countryside
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- 1194829325
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- 1700941705