Quick answers
- Which hospitals does Michael Siu work at?
- Medicare's official clinician data lists Michael Siu at 3 hospitals: Riverside Doctors' Hospital of Williamsburg, Riverside Regional Medical Center and Riverside Walter Reed Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Michael Siu see patients?
- Medicare's clinician data lists 2 practice locations, including Newport News, VA. Call before your visit to confirm the address.
- What is Michael Siu's specialty?
- Medicare lists Hospitalist as the primary specialty.
- Does Michael Siu accept Medicare assignment?
- Yes. Medicare's clinician data says Michael Siu 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 Michael Siu?
- (757) 594-3800, as listed in official Medicare / NPI Registry data.
- What is Michael Siu's NPI number?
- 1932634870. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Michael Siu works
Medicare's Facility Affiliation Data lists Michael Siu at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Riverside Doctors' Hospital of WilliamsburgWilliamsburg, VA · Acute Care Hospital · CCN 490143
- Riverside Regional Medical CenterNewport News, VA · Acute Care Hospital · CCN 490052
- Riverside Walter Reed HospitalGloucester, VA · Acute Care Hospital · CCN 490130
Practice locations
Addresses where Michael Siu is enrolled with Medicare (CMS data updated 2026-10-02).
- 10510 Jefferson Ave, ANewport News, VA 23601 (757) 594‑3800
- 500 J Clyde Morris BlvdNewport News, VA 23601 (757) 594‑3580
Group practices
Medicare enrollment lists Michael Siu as a member of these groups (CMS data updated 2026-10-02).
- Riverside Physician Services Inc797 clinicians in the group
- Riverside Hospital Inc50 clinicians in the group
Specialties
- Hospitalistprimary
Other hospitalists in Newport News
Clinicians with the same Medicare primary specialty in Newport News, VA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2017 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1932634870 |
| 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