Risa L. Zimmerman, PA
NPI 1659322840ActiveIndividual· Physician Assistant· Omaha, NE
Physician Assistant (PA) with Think Aksarben LLC, practicing in Omaha, Nebraska. Their prescriptions cost Medicare Part D more than their services did: $2,480 for 87 claims, against $1,560 paid for services in 2024. Daiichi Sankyo Inc. was the largest of 2 companies reporting payments in 2024, $178.94 in all, mostly food and beverage. Lists The Nebraska Medical Center as a hospital affiliation.
Overview
| NPI | 1659322840 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA |
| Sole proprietor | No |
| NPI issued | May 13, 2006 |
| Last updated in NPPES | May 14, 2026 |
| Certified by provider | May 14, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 528 | 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 | 56 |
|---|---|
| Services billed | 57 across 3 procedure codes |
| Paid by Medicare | $1,560 |
Part D prescriptions in 2024
| Prescriptions (claims) | 87 · 87 30-day fills |
|---|---|
| Patients | 61 |
| Total drug cost | $2,480 |
| Generic share | 93% of claims |
Education and affiliations
| Graduation year | 1992 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Think Aksarben LLCOmaha, NE · 79 clinicians
Hospital affiliation
- The Nebraska Medical CenterOmaha, NE
Industry payments (Open Payments)
- 2024$178.94 · 2 payments from 2 companies
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Daiichi Sankyo Inc. | $138.52 | 1 |
| Ipsen Biopharmaceuticals, Inc | $40.42 | 1 |
What the 2024 payments were for
- Food and Beverage$178.94 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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