Quick answers
- Where does William L. Ngo see patients?
- Medicare's clinician data lists 1 practice location in Garden Grove, CA. Call before your visit to confirm the address.
- What is William L. Ngo's specialty?
- Medicare lists General Practice as the primary specialty, and also Family Practice.
- Does William L. Ngo accept Medicare assignment?
- Yes. Medicare's clinician data says William L. Ngo 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 L. Ngo?
- (714) 590-4899, as listed in official Medicare / NPI Registry data.
- What is William L. Ngo's NPI number?
- 1932161189. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where William L. Ngo is enrolled with Medicare (CMS data updated 2026-10-02).
- 8342 Garden Grove BlvdGarden Grove, CA 92844 (714) 590‑4899
Specialties
- General Practiceprimary
- Family Practicealso
Other general practitioners in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | College Of Osteo Med Of The Pacific At Pomona |
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1932161189 |
| 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
- 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