WILLIAM G. SHARRA III MD
NPI 1376610246
Dermatology in Fontana, CA
About William G. Sharra Iii Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM G. SHARRA III MD (NPI 1376610246) is an individual dermatology provider in Fontana, California, licensed in California (G75206) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS.
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 (PECOS)
William G. Sharra Iii Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show William Sharra Iii reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Fontana, CA 92335
- Reassigned Medicare billing, California enrollment
- 5,228 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92335 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FONTANA, CA 92335
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 Sharra Iii's NPI number?
The NPI number for William Sharra Iii is 1376610246. It was assigned to this individual provider in the NPPES registry on November 29, 2006.
Where is William Sharra Iii located?
William Sharra Iii practices at 9961 Sierra Ave, Fontana, CA 92335. The listed phone number is (909) 427-3910.
What is William Sharra Iii's specialty?
The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.
Is William Sharra Iii enrolled in Medicare?
Yes. William Sharra Iii is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for William Sharra Iii's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Sharra Iii reassigns Medicare benefits to Southern California Permanente Medical Group (Fontana, 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 Sharra Iii'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 Sharra Iii was last updated on November 29, 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.