Marissa Elizabeth Lachaga, PA-S
NPI 1396397659ActiveIndividual· Physician Assistant· Hermiston, OR
Physician Assistant (PA-S) in Hermiston, Oregon, trained at University of Utah School of Medicine (class of 2020). Their prescriptions cost Medicare Part D more than their services did: $60,354 for 1,025 claims, against $633.37 paid for services in 2024. Abbvie Inc. was the largest of 8 companies reporting payments in 2025, $326.97 in all, mostly food and beverage.
Overview
| NPI | 1396397659 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-S |
| Sole proprietor | No |
| NPI issued | Jul 16, 2019 |
| Last updated in NPPES | Jun 11, 2026 |
| Certified by provider | Jun 11, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA212471 | OR |
| Physician Assistant | 363A00000X | 8438012-1206 | UT |
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 (OR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 13 |
|---|---|
| Services billed | 16 across 7 procedure codes |
| Paid by Medicare | $633.37 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,025 · 1,698 30-day fills |
|---|---|
| Patients | 129 |
| Total drug cost | $60,354 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | University of Utah School of Medicine |
|---|---|
| Graduation year | 2020 |
| Medicare specialty | Physician Assistant |
Medical group
- Good Shepherd Health Care SystemHermiston, OR · 136 clinicians
Hospital affiliation
- Good Shepherd Medical CenterHermiston, OR
Industry payments (Open Payments)
- 2025$326.97 · 15 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $109.94 | 5 |
| Sanofi Pasteur Inc. | $54.33 | 2 |
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $51.51 | 3 |
| Lundbeck LLC | $27.96 | 1 |
| Pfizer Inc. | $26.56 | 1 |
What the 2025 payments were for
- Food and Beverage$326.97 · 15 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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