DR. WILLIAM SOHN M.D.
NPI 1467781583
Urology in Fontana, CA
About Dr. William Sohn M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM SOHN M.D. (NPI 1467781583) is an individual urology provider in Fontana, California, licensed in California (A106027) and active in the NPI registry since December 2009. He is enrolled in Medicare PECOS and is a graduate of New York Medical College (2007).
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 Sohn M.d. 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 Reassignments
2Medicare enrollment records show William Sohn reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fontana, CA 92335
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1952333460 (California)
- 5,228 clinicians in this Medicare group
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 85 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 Sohn's NPI number?
The NPI number for William Sohn is 1467781583. It was assigned to this individual provider in the NPPES registry on December 19, 2009.
Where is William Sohn located?
William Sohn practices at 9961 Sierra Ave Department Of Urology, Fontana, CA 92335. The listed phone number is (909) 427-4081.
What is William Sohn's specialty?
The primary specialty registered for this NPI is Urology with taxonomy code 208800000X.
Is William Sohn enrolled in Medicare?
Yes. William Sohn 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 organizations bill Medicare for William Sohn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Sohn reassigns Medicare benefits to 2 organizations: Southern California Permanente Medical Group (Fontana, CA) and Uci Department Of Urology (Orange, CA). Each 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 Sohn'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 Sohn was last updated on November 17, 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 Sohn, M.D. · NPI 1467781583
Urology physician in Fontana, California. Individual provider, active in the CMS NPPES registry since December 19, 2009.
## Identity
- **NPI:** 1467781583 (Entity type: Individual)
- **Enumerated:** December 19, 2009
- **Primary specialty:** Urology · taxonomy 208800000X
- **State license:** A106027 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 9961 SIERRA AVE, DEPARTMENT OF UROLOGY, Fontana, CA 92335-6720
- **Phone:** (909) 427-4081
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Southern California Permanente Medical Group (NPI 1689606196, Fontana, CA); Uci Department Of Urology (NPI 1255398533, Orange, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York Medical College, class of 2007
## Record status
- **NPPES last updated:** November 17, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1467781583) · Data from the CMS NPPES public registry.