WILLIAM C. CHU, MD, INCORPORATED
NPI 1639259377
Radiology - Diagnostic Radiology in Glendora, CA
About William C. Chu, Md, Incorporated NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM C. CHU, MD, INCORPORATED (NPI 1639259377) is a healthcare organization registered as a diagnostic radiology in Glendora, California and active in the NPI registry since October 2006. The organization lists William C. Chu, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 3
Other Identifiers 6
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
William C. Chu, Md, Incorporated is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by March 31, 2027
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to William C. Chu, MD, Incorporated, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 C. Chu, MD, Incorporated's NPI number?
The NPI number for William C. Chu, MD, Incorporated is 1639259377. It was assigned to this organization in the NPPES registry on October 17, 2006.
Where is William C. Chu, MD, Incorporated located?
William C. Chu, MD, Incorporated is located at 150 W Route 66 Radiology Department, Glendora, CA 91740. The listed phone number is (626) 335-0231.
What is William C. Chu, MD, Incorporated's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is William C. Chu, MD, Incorporated enrolled in Medicare?
Yes. William C. Chu, MD, Incorporated is registered in the Medicare PECOS enrollment system.
When is William C. Chu, MD, Incorporated's Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (California, Clinic/Group Practice) is due for revalidation by March 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through William C. Chu, MD, Incorporated?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Diagnostic Radiology) reassigns their Medicare billing to William C. Chu, MD, Incorporated. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for William C. Chu, MD, Incorporated was last updated on November 28, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# William C. Chu, Md, Incorporated · NPI 1639259377
Diagnostic Radiology organization in Glendora, California. Organization record, active in the CMS NPPES registry since October 17, 2006.
## Identity
- **NPI:** 1639259377 (Entity type: Organization)
- **Enumerated:** October 17, 2006
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **Organization subpart:** No
- **Authorized official:** William Chu, PRESIDENT
## Practice location
- **Address:** 150 W ROUTE 66, RADIOLOGY DEPARTMENT, Glendora, CA 91740-6207
- **Phone:** (626) 335-0231 · **Fax:** (626) 821-0406
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** March 31, 2027 (Non-DME Part B, California, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 1 clinician (Diagnostic Radiology) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 28, 2007
- **Other identifiers:** Other 00A388582 (CA); Medicare PIN W21051 (CA); Medicare UPIN C35497 (CA); and 3 more
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Source: [NPI Profile](https://npiprofile.com/npi/1639259377) · Data from the CMS NPPES public registry.