Quick answers
- Which hospitals does Stephen A. Leonardo work at?
- Medicare's official clinician data lists Stephen A. Leonardo at 2 hospitals: Columbia Memorial Hospital and Providence Seaside Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Stephen A. Leonardo see patients?
- Medicare's clinician data lists 1 practice location in Warrenton, OR. Call before your visit to confirm the address.
- What is Stephen A. Leonardo's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Stephen A. Leonardo accept Medicare assignment?
- Yes. Medicare's clinician data says Stephen A. Leonardo accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Stephen A. Leonardo?
- (503) 338-4500, as listed in official Medicare / NPI Registry data.
- What is Stephen A. Leonardo's NPI number?
- 1366447641. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Stephen A. Leonardo works
Medicare's Facility Affiliation Data lists Stephen A. Leonardo at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Columbia Memorial HospitalAstoria, OR · Critical Access Hospital · CCN 381320
- Providence Seaside HospitalSeaside, OR · Critical Access Hospital · CCN 381303
Practice locations
Addresses where Stephen A. Leonardo is enrolled with Medicare (CMS data updated 2026-10-02).
- 1639 SE Ensign Ln, Suite B103Warrenton, OR 97146 (503) 338‑4500
Group practices
Medicare enrollment lists Stephen A. Leonardo as a member of this group (CMS data updated 2026-10-02).
- Columbia Lutheran Charities106 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Warrenton
Clinicians with the same Medicare primary specialty in Warrenton, OR — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366447641 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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