William Ong, DDS
NPI 1851499966 · General Practice Dentistry · Daly City, CA
William Ong, DDS is a General Practice Dentistry provider in Daly City, CA (NPI 1851499966).
Provider details
- NPI number
- 1851499966
- Entity type
- Individual
- Primary specialty
- General Practice DentistryDental Providers
- Credential
- DDS
- Sex
- Male
- Sole proprietor
- Yes
- License
- 43382 (CA)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Chlorhexidine Gluconate | 316 | 118 |
| Penicillin V Potassium | 44 | 33 |
| Ibuprofen | 35 | 32 |
| Amoxicillin | 16 | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-20
- Last updated
- 2019-07-11
Frequently asked questions
- What is William Ong's NPI number?
- William Ong's National Provider Identifier (NPI) is 1851499966, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Ong's specialty?
- William Ong is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
- Where is William Ong located?
- William Ong's practice location on file with NPPES is 6740 Mission St, Daly City, CA 94014-2031.
- What is William Ong's phone number?
- The practice phone number listed in the NPPES registry for William Ong is (650) 991-7397.
- Is William Ong's NPI active?
- Yes — William Ong's NPI (1851499966) is active in the NPPES registry as of the last update on 2019-07-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.