Zakary P. Walker, PA-C
NPI 1427225168ActiveIndividual· Physician Assistant, Medical· Rockville, MD
Physician Assistant, Medical (PA-C) with Usacs Integrated Acute Care Services of Maryland LLC and 1 other group, practicing in Rockville, Maryland. 406 Medicare patients in 2024, $42,310 paid; nearly all of their 142 Part D prescriptions were generic (90%). Gilead Sciences, Inc. reported $19.93 in payments in 2025, mostly food and beverage. Lists Adventist Healthcare Shady Grove Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1427225168 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | Yes |
| NPI issued | May 12, 2008 |
| Last updated in NPPES | Jul 21, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant, Medical Primary | 363AM0700X | 009882 | NY |
| Physician Assistant, Medical | 363AM0700X | C04936 | MD |
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 - Physician Assistant (DC); Practitioner - Physician Assistant (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 406 |
|---|---|
| Services billed | 453 across 20 procedure codes |
| Paid by Medicare | $42,310 |
Part D prescriptions in 2024
| Prescriptions (claims) | 142 · 154 30-day fills |
|---|---|
| Patients | 102 |
| Total drug cost | $6,036 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 2002 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical groups
- Usacs Integrated Acute Care Services of Maryland LLCRockville, MD · 179 clinicians
- Mep Observation Services LLCRockville, MD · 44 clinicians
Hospital affiliations
- Adventist Healthcare Shady Grove Medical CenterRockville, MD
- Adventist Healthcare White Oak Medical CenterSilver Spring, MD
- Suburban HospitalBethesda, MD
Industry payments (Open Payments)
- 2025$19.93 · 1 payment from 1 company
- 2024$26.24 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $19.93 | 1 |
What the 2025 payments were for
- Food and Beverage$19.93 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 34 physician assistants in Rockville · All physician assistants in Maryland