Katherine Louise Maietta, M.D.
NPI 1275799710ActiveIndividual· Internal Medicine· Oak Park, IL
Internal Medicine (M.D.) in Oak Park, Illinois, trained at Pennsylvania State University College of Medicine (class of 2008). Their prescriptions cost Medicare Part D more than their services did: $225,352 for 2,768 claims, against $27,365 paid for services in 2024. Pfizer Inc. was the largest of 5 companies reporting payments in 2025, $186.14 in all, mostly food and beverage.
Overview
| NPI | 1275799710 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 4, 2008 |
| Last updated in NPPES | Sep 15, 2026 |
| Certified by provider | Sep 15, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036.128371 | IL |
| Pediatrics | 208000000X | 036.128371 | 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 - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 119 |
|---|---|
| Services billed | 435 across 30 procedure codes |
| Paid by Medicare | $27,365 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,768 · 5,392 30-day fills |
|---|---|
| Patients | 300 |
| Total drug cost | $225,352 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | Pennsylvania State University College of Medicine |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Pediatric Medicine |
| Telehealth | Offers telehealth |
Medical group
- Lake Street Family Physicians SC IncOak Park, IL · 6 clinicians
Hospital affiliations
- Loyola University Medical CenterMaywood, IL
- Rush Oak Park HospitalOak Park, IL
- Rush University Medical CenterChicago, IL
- West Suburban Medical CenterOak Park, IL
Industry payments (Open Payments)
- 2025$186.14 · 8 payments from 5 companies
- 2024$141.22 · 9 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $55.00 | 2 |
| Novo Nordisk Inc | $51.14 | 3 |
| Exact Sciences Corporation | $31.23 | 1 |
| Sanofi Pasteur Inc. | $25.24 | 1 |
| Coopersurgical, Inc. | $23.53 | 1 |
What the 2025 payments were for
- Food and Beverage$186.14 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 83 internal medicine physicians in Oak Park · All internal medicine physicians in Illinois