William Ng, MD
NPI 1518298041 · Internal Medicine Physician · San Gabriel, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Ng, MD is a Internal Medicine Physician provider in San Gabriel, CA (NPI 1518298041).
Provider details
- NPI number
- 1518298041
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A110227 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
35 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 35 | $8 |
Typical Medicare-allowed amounts for these services range $8–$8 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 247 | 101 |
| Lisinopril | 118 | 46 |
| Losartan Potassium | 107 | 43 |
| Atorvastatin Calcium | 103 | 44 |
| Isosorbide Mononitratebrand: Isosorbide Mononitrate Er | 94 | 38 |
| Empagliflozinbrand: Jardiance | 85 | 31 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-01-22
- Last updated
- 2021-12-15
Frequently asked questions
- What is William Ng's NPI number?
- William Ng's National Provider Identifier (NPI) is 1518298041, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Ng's specialty?
- William Ng is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Ng located?
- William Ng's practice location on file with NPPES is 506 W Valley Blvd, San Gabriel, CA 91776-5716.
- What is William Ng's phone number?
- The practice phone number listed in the NPPES registry for William Ng is (408) 469-3856.
- Does William Ng accept Medicare?
- William Ng is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Ng's NPI active?
- Yes — William Ng's NPI (1518298041) is active in the NPPES registry as of the last update on 2021-12-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.