Quick answers
- Which hospitals does William K. Armstrong work at?
- Medicare's official clinician data lists William K. Armstrong at 2 hospitals: Hoag Memorial Hospital Presbyterian and UCI Health-Orange. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William K. Armstrong see patients?
- Medicare's clinician data lists 1 practice location in Newport Beach, CA. Call before your visit to confirm the address.
- What is William K. Armstrong's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does William K. Armstrong accept Medicare assignment?
- Yes. Medicare's clinician data says William K. 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.
- Does William K. Armstrong offer telehealth?
- Medicare's clinician data says William K. Armstrong offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for William K. Armstrong?
- (949) 644-1025, as listed in official Medicare / NPI Registry data.
- What is William K. Armstrong's NPI number?
- 1902133424. 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 K. Armstrong works
Medicare's Facility Affiliation Data lists William K. Armstrong at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Hoag Memorial Hospital PresbyterianNewport Beach, CA · Acute Care Hospital · CCN 050224
- UCI Health-OrangeOrange, CA · Acute Care Hospital · CCN 050348
Practice locations
Addresses where William K. Armstrong is enrolled with Medicare (CMS data updated 2026-10-02).
- 520 Superior Ave, Suite 360Newport Beach, CA 92663 (949) 644‑1025
Group practices
Medicare enrollment lists William K. Armstrong as a member of this group (CMS data updated 2026-10-02).
- Hoag Clinic460 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Newport Beach
Clinicians with the same Medicare primary specialty in Newport Beach, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1902133424 |
| 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