Stephen P. Rittmann, MD
NPI 1104857473ActiveIndividual· Family Medicine· Schaumburg, IL
Family Medicine (MD) with Bonaventure Medical Foundation LLC, practicing in Schaumburg, Illinois. Their prescriptions cost Medicare Part D more than their services did: $820,558 for 8,380 claims, against $90,211 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 17 companies reporting payments in 2025, $2,070 in all, mostly food and beverage. Lists Alexian Brothers Medical Center 1 and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1104857473 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 5, 2006 |
| Last updated in NPPES | Apr 6, 2021 |
| Certified by provider | Apr 6, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 036-055551 | 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 - Family Practice (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 344 |
|---|---|
| Services billed | 1,601 across 34 procedure codes |
| Paid by Medicare | $90,211 |
Part D prescriptions in 2024
| Prescriptions (claims) | 8,380 · 19,476 30-day fills |
|---|---|
| Patients | 669 |
| Total drug cost | $820,558 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 1976 |
|---|---|
| Medicare specialty | Family Practice |
Medical group
- Bonaventure Medical Foundation LLCBartlett, IL · 167 clinicians
Hospital affiliations
- Alexian Brothers Medical Center 1Elk Grove Village, IL
- Northwest Community Hospital 1Arlington Heights, IL
- St Alexius Medical CenterHoffman Estates, IL
Industry payments (Open Payments)
- 2025$2,070 · 125 payments from 17 companies
- 2024$2,777 · 162 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $365.40 | 24 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $268.97 | 14 |
| Amgen Inc. | $236.84 | 19 |
| Novo Nordisk Inc | $227.54 | 13 |
| Lilly USA, LLC | $160.62 | 10 |
What the 2025 payments were for
- Food and Beverage$2,037 · 124 payments
- Education$32.27 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 57 family medicine physicians in Schaumburg · All family medicine physicians in Illinois