Quick answers
- Which hospitals does Allen Sy work at?
- Medicare's official clinician data lists Allen Sy at 1 hospital: Valley Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Allen Sy see patients?
- Medicare's clinician data lists 1 practice location in Renton, WA. Call before your visit to confirm the address.
- What is Allen Sy's specialty?
- Medicare lists Hospitalist as the primary specialty, and also Internal Medicine.
- Does Allen Sy accept Medicare assignment?
- Yes. Medicare's clinician data says Allen Sy 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 Allen Sy?
- (425) 228-3450, as listed in official Medicare / NPI Registry data.
- What is Allen Sy's NPI number?
- 1033615380. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Allen Sy works
Medicare's Facility Affiliation Data lists Allen Sy at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Valley Medical CenterRenton, WA · Acute Care Hospital · CCN 500088
Practice locations
Addresses where Allen Sy is enrolled with Medicare (CMS data updated 2026-10-02).
- 400 S 43rd StRenton, WA 98055 (425) 228‑3450
Group practices
Medicare enrollment lists Allen Sy as a member of this group (CMS data updated 2026-10-02).
- Valley Medical Group-Renton411 clinicians in the group
Specialties
- Hospitalistprimary
- Internal Medicinealso
Other hospitalists in Renton
Clinicians with the same Medicare primary specialty in Renton, WA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Washington School Of Medicine |
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1033615380 |
| 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