Joanna Kopacz, MD
NPI 1275792368ActiveIndividual· Internal Medicine, Infectious Disease· Laguna Hills, CA
Internal Medicine, Infectious Disease (MD) in Laguna Hills, California, licensed in CA and NY, with an NPI issued in June 2008. Their prescriptions cost Medicare Part D more than their services did: $551,126 for 789 claims, against $118,110 paid for services in 2024. Gilead Sciences, Inc. reported $122.45 in payments in 2025, mostly food and beverage. Lists Memorialcare Saddleback Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1275792368 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jun 4, 2008 |
| Last updated in NPPES | Feb 28, 2024 |
| Certified by provider | Feb 28, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | A128174 | CA |
| Internal Medicine, Infectious Disease | 207RI0200X | 262583 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Infectious Disease (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 364 |
|---|---|
| Services billed | 1,204 across 10 procedure codes |
| Paid by Medicare | $118,110 |
Part D prescriptions in 2024
| Prescriptions (claims) | 789 · 843 30-day fills |
|---|---|
| Patients | 178 |
| Total drug cost | $551,126 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 2004 |
|---|---|
| Medicare specialty | Infectious Disease |
| Secondary specialties | Geriatric Medicine |
Hospital affiliations
- Memorialcare Saddleback Medical CenterLaguna Hills, CA
- Providence St. Joseph HospitalOrange, CA
Other facilities
- Care Plus Home HealthHome health agency · Laguna Hills, CA
- Mission Home Health of Irvine, LLCHome health agency · Irvine, CA
Industry payments (Open Payments)
- 2025$122.45 · 1 payment from 1 company
- 2024$16.81 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $122.45 | 1 |
What the 2025 payments were for
- Food and Beverage$122.45 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Infectious Disease providers in Laguna Hills
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All Internal Medicine, Infectious Disease providers in California →