Karla E. Stewart, PA-C
NPI 1598746521ActiveIndividual· Physician Assistant· Lake Forest, IL
Physician Assistant (PA-C) with Northwestern Medical Faculty Foundation, practicing in Lake Forest, Illinois. 192 Medicare patients in 2024, $44,617 paid; nearly all of their 187 Part D prescriptions were generic (99%). Lightbody Medical Technologies Inc reported $24.06 in payments in 2025, mostly food and beverage. Lists Northwestern Lake Forest Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1598746521 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Nov 8, 2005 |
| Last updated in NPPES | Jun 26, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 085.005063 | 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 | 192 |
|---|---|
| Services billed | 1,614 across 14 procedure codes |
| Paid by Medicare | $44,617 |
Part D prescriptions in 2024
| Prescriptions (claims) | 187 · 221 30-day fills |
|---|---|
| Patients | 73 |
| Total drug cost | $1,697 |
| Generic share | 99% of claims |
Education and affiliations
| Graduation year | 2002 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Northwestern Medical Faculty FoundationChicago, IL · 4,503 clinicians
Hospital affiliations
- Northwestern Lake Forest HospitalLake Forest, IL
- Northwestern Medicine McHenryMcHenry, IL
Industry payments (Open Payments)
- 2025$24.06 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lightbody Medical Technologies Inc | $24.06 | 1 |
What the 2025 payments were for
- Food and Beverage$24.06 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 69 physician assistants in Lake Forest · All physician assistants in Illinois