Sigrun Hallmeyer, MD
NPI 1164481412ActiveIndividual· Internal Medicine, Hematology & Oncology· Park Ridge, IL
Internal Medicine, Hematology & Oncology (MD) with Advocate Health and Hospitals Corporation, practicing in Park Ridge, Illinois. Their prescriptions cost Medicare Part D more than their services did: $1,245,486 for 959 claims, against $69,594 paid for services in 2024. Stemline Therapeutics Inc. was the largest of 5 companies reporting payments in 2025, $18,305 in all, mostly consulting fees. Lists Advocate Christ Hospital & Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1164481412 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 23, 2006 |
| Last updated in NPPES | Aug 13, 2025 |
| Certified by provider | Aug 13, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 036106308 | 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 - Hematology/Oncology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 347 |
|---|---|
| Services billed | 1,089 across 17 procedure codes |
| Paid by Medicare | $69,594 |
Part D prescriptions in 2024
| Prescriptions (claims) | 959 · 2,006 30-day fills |
|---|---|
| Patients | 203 |
| Total drug cost | $1,245,486 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- Advocate Health and Hospitals CorporationChicago, IL · 3,118 clinicians
Hospital affiliations
- Advocate Christ Hospital & Medical CenterOak Lawn, IL
- Advocate Condell Medical CenterLibertyville, IL
- Advocate Good Shepherd HospitalBarrington, IL
- Advocate Illinois Masonic Medical CenterChicago, IL
- Advocate Lutheran General HospitalPark Ridge, IL
Other facilities
- Advocate Home Health Care ServHome health agency · Oakbrook, IL
Industry payments (Open Payments)
- 2025$18,305 · 15 payments from 5 companies
- 2024$9,989 · 12 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Stemline Therapeutics Inc. | $4,960 | 2 |
| Astrazeneca Pharmaceuticals LP | $4,675 | 3 |
| Immunocore Limited | $4,500 | 2 |
| Gilead Sciences, Inc. | $3,260 | 6 |
| Daiichi Sankyo Inc. | $910.00 | 2 |
What the 2025 payments were for
- Consulting Fee$13,595 · 8 payments
- Honoraria$4,500 · 2 payments
- Food and Beverage$210.00 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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