Gretchen L. Mahaney Caldwell, APN
NPI 1265763163ActiveIndividual· Nurse Practitioner· Springfield, IL
Nurse Practitioner (APN) in Springfield, Illinois, trained at Southern Illinois University School of Medicine (class of 2009). Their prescriptions cost Medicare Part D more than their services did: $514,815 for 2,969 claims, against $58,961 paid for services in 2024. Novo Nordisk Inc was the largest of 5 companies reporting payments in 2025, $317.75 in all, mostly food and beverage.
Overview
| NPI | 1265763163 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | APN |
| Sole proprietor | Yes |
| NPI issued | Jan 18, 2010 |
| Last updated in NPPES | Jan 15, 2026 |
| Certified by provider | Jan 15, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 209007736 | IL |
| Internal Medicine, Interventional Cardiology | 207RI0011X | 209.007736 | 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 - Nurse Practitioner (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 550 |
|---|---|
| Services billed | 775 across 17 procedure codes |
| Paid by Medicare | $58,961 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,969 · 5,969 30-day fills |
|---|---|
| Patients | 476 |
| Total drug cost | $514,815 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | Southern Illinois University School of Medicine |
|---|---|
| Graduation year | 2009 |
| Medicare specialty | Nurse Practitioner |
Medical group
- Prairie Cardiovascular Consultants LtdDecatur, IL · 90 clinicians
Hospital affiliations
- Mc Donough District HospitalMacomb, IL
- Memorial HospitalCarthage, IL
- Pana Community HospitalPana, IL
- St Anthonys Memorial HospitalEffingham, IL
- St Johns HospitalSpringfield, IL
Industry payments (Open Payments)
- 2025$317.75 · 8 payments from 5 companies
- 2024$287.62 · 7 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $116.77 | 1 |
| Amgen Inc. | $75.00 | 1 |
| Novartis Pharmaceuticals Corporation | $61.42 | 3 |
| Merz North America, Inc. | $56.60 | 2 |
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $7.96 | 1 |
What the 2025 payments were for
- Food and Beverage$317.75 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Nurse Practitioner providers in Springfield
- 1528084266
- 1770558694
- 1841216975
- 1598682296
- 1801615117
- 1326069014
- 1295942951
- 1376775361
- 1306959317
- 1568830644
- 1467602490
- 1326670183