DR. WILLIAM NG MD
NPI 1518298041
Internal Medicine in San Gabriel, CA
About Dr. William Ng Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM NG MD (NPI 1518298041) is an individual internal medicine provider in San Gabriel, California, licensed in California (A110227) and active in the NPI registry since January 2010. He is enrolled in Medicare PECOS and is a graduate of Other (1986).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. William Ng Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show William Ng reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Santa Clara, CA 95051
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 91776 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN GABRIEL, CA 91776
SAN GABRIEL, CA 91776
SAN GABRIEL, CA 91776
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is William Ng's NPI number?
The NPI number for William Ng is 1518298041. It was assigned to this individual provider in the NPPES registry on January 22, 2010.
Where is William Ng located?
William Ng practices at 506 W Valley Blvd, San Gabriel, CA 91776. The listed phone number is (408) 469-3856.
What is William Ng's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is William Ng enrolled in Medicare?
Yes. William Ng is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for William Ng's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Ng reassigns Medicare benefits to Permanente Medical Group Inc (Santa Clara, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Ng's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for William Ng was last updated on December 15, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. William Ng, MD · NPI 1518298041
Internal Medicine physician in San Gabriel, California. Individual provider, active in the CMS NPPES registry since January 22, 2010.
## Identity
- **NPI:** 1518298041 (Entity type: Individual)
- **Enumerated:** January 22, 2010
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A110227 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 506 W VALLEY BLVD, San Gabriel, CA 91776-5716
- **Phone:** (408) 469-3856
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Permanente Medical Group Inc (NPI 1073606299, Santa Clara, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1986
## Record status
- **NPPES last updated:** December 15, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1518298041) · Data from the CMS NPPES public registry.