Margaret M. Gaynor, APRN, CNP
NPI 1164890869ActiveIndividual· Nurse Practitioner· McHenry, IL
Nurse Practitioner (APRN, CNP) with Northwestern Medical Faculty Foundation, practicing in McHenry, Illinois. Their prescriptions cost Medicare Part D more than their services did: $190,794 for 474 claims, against $26,176 paid for services in 2024. Intuitive Surgical, Inc. was the largest of 3 companies reporting payments in 2025, $1,334 in all, mostly food and beverage. Lists Northwestern Lake Forest Hospital and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1164890869 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | APRN, CNP |
| Sole proprietor | No |
| NPI issued | Sep 11, 2015 |
| Last updated in NPPES | Sep 5, 2024 |
| Certified by provider | Sep 5, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 209013236 | IL |
| Nurse Practitioner, Gerontology | 363LG0600X | 041.256894 | 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 - Nurse Practitioner (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 210 |
|---|---|
| Services billed | 332 across 14 procedure codes |
| Paid by Medicare | $26,176 |
Part D prescriptions in 2024
| Prescriptions (claims) | 474 · 688 30-day fills |
|---|---|
| Patients | 164 |
| Total drug cost | $190,794 |
| Generic share | 38% of claims |
Education and affiliations
| Graduation year | 2015 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Northwestern Medical Faculty FoundationChicago, IL · 4,503 clinicians
Hospital affiliations
- Northwestern Lake Forest HospitalLake Forest, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Northwestern Medicine McHenryMcHenry, IL
- Northwestern Memorial HospitalChicago, IL
Industry payments (Open Payments)
- 2025$1,334 · 5 payments from 3 companies
- 2024$2,554 · 11 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $1,108 | 3 |
| Pulmonx Corporation | $137.86 | 1 |
| Steris Corporation | $89.04 | 1 |
What the 2025 payments were for
- Food and Beverage$888.52 · 3 payments
- Travel and Lodging$445.97 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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