Karen Lizarraga, PA-C
NPI 1225783558ActiveIndividual· Physician Assistant· Gaithersburg, MD
Physician Assistant (PA-C) with Doctors First, LLC, practicing in Gaithersburg, Maryland. Their prescriptions cost Medicare Part D more than their services did: $145,912 for 1,388 claims, against $19,405 paid for services in 2024. Exact Sciences Corporation reported $19.41 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1225783558 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Feb 15, 2022 |
| Last updated in NPPES | Feb 15, 2022 |
| Certified by provider | Feb 15, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | — | — |
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 - Physician Assistant (DC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 59 |
|---|---|
| Services billed | 231 across 15 procedure codes |
| Paid by Medicare | $19,405 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,388 · 3,303 30-day fills |
|---|---|
| Patients | 131 |
| Total drug cost | $145,912 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2021 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Doctors First, LLCGermantown, MD · 59 clinicians
Other facilities
- Adventist Home Health Services, Inc.Home health agency · Silver Spring, MD
Industry payments (Open Payments)
- 2025$19.41 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $19.41 | 1 |
What the 2025 payments were for
- Food and Beverage$19.41 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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