William Ngo, DO
NPI 1932161189 · Geriatric Medicine (Family Medicine) Physician · Garden Grove, CA
Enrolled with Medicare as Practitioner - General Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Ngo, DO is a Geriatric Medicine (Family Medicine) Physician provider in Garden Grove, CA (NPI 1932161189).
Provider details
- NPI number
- 1932161189
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Family Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 20A6015 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 79 | 23 |
| Amlodipine Besylate | 76 | 23 |
| Metformin Hcl | 61 | 18 |
| Alendronate Sodium | 49 | 13 |
| Benazepril Hcl | 48 | 14 |
| Amoxicillin | 43 | 28 |
| Triamcinolone Acetonide | 41 | 17 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-04
- Last updated
- 2008-05-16
Frequently asked questions
- What is William Ngo's NPI number?
- William Ngo's National Provider Identifier (NPI) is 1932161189, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Ngo's specialty?
- William Ngo is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Family Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is William Ngo located?
- William Ngo's practice location on file with NPPES is 8342 Garden Grove Blvd Ste 5, Garden Grove, CA 92844-1192.
- What is William Ngo's phone number?
- The practice phone number listed in the NPPES registry for William Ngo is (714) 590-4899.
- Does William Ngo accept Medicare?
- William Ngo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Ngo's NPI active?
- Yes — William Ngo's NPI (1932161189) is active in the NPPES registry as of the last update on 2008-05-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.