Kathleen M. Tonkin, PAC
NPI 1144210402ActiveIndividual· Internal Medicine, Hematology & Oncology· Lincoln, NE
Internal Medicine, Hematology & Oncology (PAC) in Lincoln, Nebraska, licensed in NE, with an NPI issued in October 2005. Their prescriptions cost Medicare Part D more than their services did: $2,606,534 for 1,250 claims, against $23,873 paid for services in 2024. Pfizer Inc. was the largest of 29 companies reporting payments in 2025, $934.17 in all, mostly food and beverage.
Overview
| NPI | 1144210402 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PAC |
| Sole proprietor | No |
| NPI issued | Oct 26, 2005 |
| Last updated in NPPES | Mar 16, 2024 |
| Certified by provider | Mar 16, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 944 | NE |
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 (NE) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 259 |
|---|---|
| Services billed | 372 across 10 procedure codes |
| Paid by Medicare | $23,873 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,250 · 1,587 30-day fills |
|---|---|
| Patients | 370 |
| Total drug cost | $2,606,534 |
| Generic share | 80% of claims |
Industry payments (Open Payments)
- 2025$934.17 · 46 payments from 29 companies
- 2024$1,035 · 52 payments from 29 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $137.17 | 9 |
| Seagen Inc. | $89.99 | 1 |
| Abbvie Inc. | $74.37 | 3 |
| Merck Sharp & Dohme LLC | $59.54 | 3 |
| Kite Pharma, Inc. | $43.03 | 2 |
What the 2025 payments were for
- Food and Beverage$844.18 · 45 payments
- Education$89.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 20 hematologist-oncologists in Lincoln · All hematologist-oncologists in Nebraska