Ulrike H. Ziegner, MD PHD
NPI 1407867203ActiveIndividual· Specialist· Redondo Beach, CA
Specialist (MD PHD) with Oso Specialty Infusion Inc, practicing in Redondo Beach, California. Their prescriptions cost Medicare Part D more than their services did: $417,031 for 703 claims, against $110,628 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 19 companies reporting payments in 2025, $2,780 in all, mostly food and beverage. Lists Torrance Memorial Medical Center as a hospital affiliation.
Overview
| NPI | 1407867203 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD PHD |
| Sole proprietor | Yes |
| NPI issued | Aug 10, 2006 |
| Last updated in NPPES | Nov 27, 2023 |
| Certified by provider | Nov 27, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | A55506 | CA |
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 - Pediatric Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 150 |
|---|---|
| Services billed | 12,187 across 18 procedure codes |
| Paid by Medicare | $110,628 |
Part D prescriptions in 2024
| Prescriptions (claims) | 703 · 1,121 30-day fills |
|---|---|
| Patients | 127 |
| Total drug cost | $417,031 |
| Generic share | 58% of claims |
Education and affiliations
| Graduation year | 1984 |
|---|---|
| Medicare specialty | Pediatric Medicine |
| Telehealth | Offers telehealth |
Medical group
- Oso Specialty Infusion IncIrvine, CA · 9 clinicians
Hospital affiliation
- Torrance Memorial Medical CenterTorrance, CA
Industry payments (Open Payments)
- 2025$2,780 · 122 payments from 19 companies
- 2024$2,369 · 106 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $691.83 | 45 |
| Genzyme Corporation | $478.89 | 12 |
| Glaxosmithkline, LLC. | $402.04 | 17 |
| Ars Pharmaceuticals Operations, Inc. | $237.51 | 5 |
| Novartis Pharmaceuticals Corporation | $173.71 | 9 |
What the 2025 payments were for
- Food and Beverage$2,780 · 122 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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