Diana Guillaume, NP
NPI 1396037685ActiveIndividual· Nurse Practitioner, Adult Health· Skokie, IL
Nurse Practitioner, Adult Health (NP) with Oak Street Health Physicians Group PC, practicing in Skokie, Illinois. Their prescriptions cost Medicare Part D more than their services did: $760,260 for 7,136 claims, against $9,026 paid for services in 2024. Lists Northshore University Healthsystem - Evanston Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1396037685 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | NP |
| Sole proprietor | No |
| NPI issued | May 5, 2011 |
| Last updated in NPPES | Apr 14, 2026 |
| Certified by provider | Apr 14, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Adult Health Primary | 363LA2200X | 277.005282 | 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 | 48 |
|---|---|
| Services billed | 182 across 20 procedure codes |
| Paid by Medicare | $9,026 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,136 · 18,329 30-day fills |
|---|---|
| Patients | 597 |
| Total drug cost | $760,260 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Oak Street Health Physicians Group PCBlue Island, IL · 229 clinicians
Hospital affiliations
- Northshore University Healthsystem - Evanston HospitalEvanston, IL
- Saint Francis Hospital-EvanstonEvanston, IL
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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