Karen A. Zoller, M.D.
NPI 1508861535ActiveIndividual· Internal Medicine, Nephrology· Long Beach, CA
Internal Medicine, Nephrology (M.D.) in Long Beach, California, trained at University of California, Geffen School of Medicine (class of 1977). Their prescriptions cost Medicare Part D more than their services did: $149,708 for 1,013 claims, against $77,079 paid for services in 2024. Otsuka America Pharmaceutical, Inc. was the largest of 10 companies reporting payments in 2025, $383.06 in all, mostly food and beverage.
Overview
| NPI | 1508861535 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 16, 2005 |
| Last updated in NPPES | Aug 13, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | G37085 | CA |
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 - Nephrology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 101 |
|---|---|
| Services billed | 1,215 across 19 procedure codes |
| Paid by Medicare | $77,079 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,013 · 2,680 30-day fills |
|---|---|
| Patients | 99 |
| Total drug cost | $149,708 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1977 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Other facilities
- Usrc West Coast DialysisDialysis facility · Long Beach, CA
Industry payments (Open Payments)
- 2025$383.06 · 15 payments from 10 companies
- 2024$272.66 · 11 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Otsuka America Pharmaceutical, Inc. | $85.44 | 3 |
| Bayer Healthcare Pharmaceuticals Inc. | $63.61 | 2 |
| Novartis Pharmaceuticals Corporation | $54.60 | 2 |
| Vifor Pharma, Inc. | $50.49 | 2 |
| Aurinia Pharma U.S., Inc. | $29.87 | 1 |
What the 2025 payments were for
- Food and Beverage$383.06 · 15 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 30 nephrologists in Long Beach · All nephrologists in California