Mariana Nieves, APRN, CNP
NPI 1932808839ActiveIndividual· Nurse Practitioner· Chicago, IL
Nurse Practitioner (APRN, CNP) with Northwestern Medical Faculty Foundation, practicing in Chicago, Illinois. Their prescriptions cost Medicare Part D more than their services did: $183,764 for 234 claims, against $8,918 paid for services in 2024. Servier Pharmaceuticals LLC was the largest of 2 companies reporting payments in 2025, $6,187 in all, mostly compensation for serving as faculty or as a speaker for a me. Lists Northwestern Lake Forest Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1932808839 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | APRN, CNP |
| Sole proprietor | Yes |
| NPI issued | Feb 28, 2023 |
| Last updated in NPPES | Aug 9, 2023 |
| Certified by provider | Aug 9, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 209026516 | IL |
| Nurse Practitioner, Adult Health | 363LA2200X | 209026516 | 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 | 27 |
|---|---|
| Services billed | 99 across 8 procedure codes |
| Paid by Medicare | $8,918 |
Part D prescriptions in 2024
| Prescriptions (claims) | 234 · 312 30-day fills |
|---|---|
| Patients | 31 |
| Total drug cost | $183,764 |
| Generic share | 82% of claims |
Education and affiliations
| Graduation year | 2022 |
|---|---|
| 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 Memorial HospitalChicago, IL
Industry payments (Open Payments)
- 2025$6,187 · 19 payments from 2 companies
- 2024$4,098 · 18 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Servier Pharmaceuticals LLC | $5,745 | 17 |
| Novocure Inc. | $442.72 | 2 |
What the 2025 payments were for
- Compensation for serving as faculty or as a speaker for a medical education program$4,565 · 3 payments
- Travel and Lodging$852.32 · 9 payments
- Consulting Fee$425.00 · 1 payment
- Food and Beverage$344.92 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Nurse Practitioner providers in Chicago
- 1346655065
- 1356680482
- 1609110238
- 1194642918
- 1417630229
- 1275439994
- 1710671110
- 1255797106
- 1033702543
- 1790526994
- 1215715529
- 1699450643