Quick answers
- Does Olivia G. Erway accept Medicare assignment?
- Yes. Medicare's clinician data says Olivia G. Erway accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Olivia G. Erway's NPI number?
- 1598615049. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Olivia G. Erway works
Medicare's Facility Affiliation Data lists Olivia G. Erway at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260020
- Mercy Hospital WashingtonWashington, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260052
Practice locations
Addresses where Olivia G. Erway is enrolled with Medicare (CMS data updated October 2, 2026).
- 901 Patients 1st DrWashington, MO 63090
Group practices
Medicare enrollment lists Olivia G. Erway as a member of this group (CMS data updated October 2, 2026).
- Mercy Clinic East Communities571 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Washington
Clinicians with the same Medicare primary specialty in Washington, MO — not a recommendation.
Other clinicians in Mercy Clinic East Communities
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2025 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1598615049 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians