Quick answers
- Which hospitals does William Armstrong work at?
- Medicare's official clinician data lists William Armstrong at 2 hospitals: Flagler Hospital and Riverside Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William Armstrong see patients?
- Medicare's clinician data lists 5 practice locations, including Melville, NY, St Augustine, FL and Leesburg, VA. Call before your visit to confirm the address.
- What is William Armstrong's specialty?
- Medicare lists Certified Registered Nurse Anesthetist (CRNA) as the primary specialty.
- Does William Armstrong accept Medicare assignment?
- Yes. Medicare's clinician data says William Armstrong 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 William Armstrong?
- (904) 819-4050, as listed in official Medicare / NPI Registry data.
- What is William Armstrong's NPI number?
- 1356461388. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William Armstrong works
Medicare's Facility Affiliation Data lists William Armstrong at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Flagler HospitalSaint Augustine, FL · Acute Care Hospital · CCN 100090
- Riverside Regional Medical CenterNewport News, VA · Acute Care Hospital · CCN 490052
Practice locations
Addresses where William Armstrong is enrolled with Medicare (CMS data updated 2026-10-02).
- 1305 Walt Whitman Rd, Suite 300Melville, NY 11747
- 180 Southpark BlvdSt Augustine, FL 32086 (904) 819‑4050
- 19455 Deerfield Ave, Suite 204Leesburg, VA 20176 (703) 724‑9950
- 400 Health Park BlvdSt Augustine, FL 32086 (904) 819‑5155
- 500 J Clyde Morris BlvdNewport News, VA 23601 (757) 594‑2000
Group practices
Medicare enrollment lists William Armstrong as a member of these groups (CMS data updated 2026-10-02).
- American Anesthesiology of Virginia PC531 clinicians in the group
- American Anesthesiology Services of Florida Inc171 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), New York →
Other nurse anesthetists in Melville
Clinicians with the same Medicare primary specialty in Melville, NY — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1356461388 |
| 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