Heather Marie Gannon-Stringer, P.A.
NPI 1598989097ActiveIndividual· Physician Assistant· Chicago, IL
Physician Assistant (P.A.) with Affiliated Oncologists LLC, practicing in Chicago, Illinois. 217 Medicare patients in 2024, $470,827 paid; nearly all of their 279 Part D prescriptions were generic (90%). Astrazeneca Pharmaceuticals LP was the largest of 14 companies reporting payments in 2025, $615.93 in all, mostly food and beverage. Lists Advocate Christ Hospital & Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1598989097 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | P.A. |
| Sole proprietor | No |
| NPI issued | Apr 13, 2007 |
| Last updated in NPPES | Aug 7, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 085-002735 | 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 - Physician Assistant (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 217 |
|---|---|
| Services billed | 22,534 across 78 procedure codes |
| Paid by Medicare | $470,827 |
Part D prescriptions in 2024
| Prescriptions (claims) | 279 · 331 30-day fills |
|---|---|
| Patients | 87 |
| Total drug cost | $335,162 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 2006 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Affiliated Oncologists LLCMokena, IL · 44 clinicians
Hospital affiliations
- Advocate Christ Hospital & Medical CenterOak Lawn, IL
- Osf Little Company of Mary Medical CenterEvergreen Park, IL
- Palos Community HospitalPalos Heights, IL
Industry payments (Open Payments)
- 2025$615.93 · 28 payments from 14 companies
- 2024$489.39 · 20 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $136.15 | 7 |
| Merck Sharp & Dohme LLC | $104.31 | 4 |
| Abbvie Inc. | $76.85 | 4 |
| Pfizer Inc. | $65.01 | 3 |
| Astellas Pharma US Inc | $28.21 | 1 |
What the 2025 payments were for
- Food and Beverage$615.93 · 28 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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