Zachary Parnell Giesen, DO
NPI 1083077408ActiveIndividual· Internal Medicine, Cardiovascular Disease· Medford, OR
Internal Medicine, Cardiovascular Disease (DO) with Asante and 2 other groups, practicing in Medford, Oregon. Their prescriptions cost Medicare Part D more than their services did: $544,877 for 1,928 claims, against $100,582 paid for services in 2024. Zoll Services LLC (A/K/A Zoll Lifecor Corp) was the largest of 3 companies reporting payments in 2025, $79.24 in all, mostly food and beverage. Lists Asante Ashland Community Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1083077408 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Apr 2, 2016 |
| Last updated in NPPES | Jul 29, 2022 |
| Certified by provider | Jul 29, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | DO209735 | OR |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Cardiovascular Disease (Cardiology) (OR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,191 |
|---|---|
| Services billed | 2,625 across 39 procedure codes |
| Paid by Medicare | $100,582 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,928 · 4,710 30-day fills |
|---|---|
| Patients | 365 |
| Total drug cost | $544,877 |
| Generic share | 76% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Telehealth | Offers telehealth |
Medical groups
- AsanteMedford, OR · 149 clinicians
- Asante Three Rivers Medical Center LLCGrants Pass, OR · 99 clinicians
- Southern Oregon Cardiology LLCMedford, OR · 28 clinicians
Hospital affiliations
- Asante Ashland Community HospitalAshland, OR
- Asante Rogue Regional Medical CenterMedford, OR
- Asante Three Rivers Medical CenterGrants Pass, OR
- Curry General HospitalGold Beach, OR
- Sutter Coast HospitalCrescent City, CA
Industry payments (Open Payments)
- 2025$79.24 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $44.00 | 2 |
| Cordis US Corp. | $21.15 | 1 |
| Medtronic, Inc. | $14.09 | 1 |
What the 2025 payments were for
- Food and Beverage$79.24 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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