Marisa Kaiser, NP
NPI 1558811471ActiveIndividual· Nurse Practitioner, Women's Health· Tucson, AZ
Nurse Practitioner, Women's Health (NP) with Genesis OB GYN PLLC, practicing in Tucson, Arizona. Their prescriptions cost Medicare Part D more than their services did: $8,462 for 198 claims, against $5,184 paid for services in 2024. Biogen, Inc. was the largest of 7 companies reporting payments in 2025, $311.21 in all, mostly food and beverage. Lists Tucson Medical Center as a hospital affiliation.
Overview
| NPI | 1558811471 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | NP |
| Sole proprietor | No |
| NPI issued | Oct 4, 2016 |
| Last updated in NPPES | Aug 10, 2023 |
| Certified by provider | Aug 10, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Women's Health Primary | 363LW0102X | AP9015 | AZ |
| Nurse Practitioner, Obstetrics & Gynecology | 363LX0001X | AP9015 | AZ |
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 - Nurse Practitioner (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 81 |
|---|---|
| Services billed | 129 across 14 procedure codes |
| Paid by Medicare | $5,184 |
Part D prescriptions in 2024
| Prescriptions (claims) | 198 · 332 30-day fills |
|---|---|
| Patients | 84 |
| Total drug cost | $8,462 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Genesis OB GYN PLLCOro Valley, AZ · 110 clinicians
Hospital affiliation
- Tucson Medical CenterTucson, AZ
Industry payments (Open Payments)
- 2025$311.21 · 11 payments from 7 companies
- 2024$440.24 · 18 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Biogen, Inc. | $99.49 | 5 |
| Hologic Sales and Service, LLC | $95.54 | 1 |
| Sumitomo Pharma America, Inc. | $28.74 | 1 |
| Abbvie Inc. | $24.84 | 1 |
| Merck Sharp & Dohme LLC | $22.78 | 1 |
What the 2025 payments were for
- Food and Beverage$311.21 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 31 women's health nurse practitioners in Tucson · All women's health nurse practitioners in Arizona