Rita Joanne Herzing, M.D.
NPI 1316103559ActiveIndividual· Internal Medicine· Glen Ellyn, IL
Internal Medicine (M.D.) in Glen Ellyn, Illinois, trained at Loyola University of Chicago, Stritch School of Medicine (class of 2006). Their prescriptions cost Medicare Part D more than their services did: $385,660 for 9,429 claims, against $210,012 paid for services in 2024. Exact Sciences Corporation was the largest of 4 companies reporting payments in 2025, $189.32 in all, mostly food and beverage.
Overview
| NPI | 1316103559 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 6, 2008 |
| Last updated in NPPES | Aug 8, 2023 |
| Certified by provider | Aug 8, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036122493 | IL |
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 - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 491 |
|---|---|
| Services billed | 5,742 across 116 procedure codes |
| Paid by Medicare | $210,012 |
Part D prescriptions in 2024
| Prescriptions (claims) | 9,429 · 23,596 30-day fills |
|---|---|
| Patients | 802 |
| Total drug cost | $385,660 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | Loyola University of Chicago, Stritch School of Medicine |
|---|---|
| Graduation year | 2006 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Dupage Medical Group LtdWinfield, IL · 1,322 clinicians
Hospital affiliation
- Northwestern Medicine Central Dupage HospitalWinfield, IL
Other facilities
- Residential Home HealthHome health agency · Lisle, IL
- Covenant Living - Windsor ParkNursing home · Carol Stream, IL
Industry payments (Open Payments)
- 2025$189.32 · 8 payments from 4 companies
- 2024$71.43 · 3 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $74.83 | 3 |
| Lilly USA, LLC | $51.13 | 2 |
| Novo Nordisk Inc | $49.26 | 2 |
| Abbvie Inc. | $14.10 | 1 |
What the 2025 payments were for
- Food and Beverage$189.32 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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