WHITTIER ONCOLOGY MEDICAL CLINIC, INC.
NPI 1427101229
Clinic/Center - Oncology, Radiation in Whittier, CA
About Whittier Oncology Medical Clinic, Inc. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WHITTIER ONCOLOGY MEDICAL CLINIC, INC. (NPI 1427101229) is a healthcare organization registered as an oncology, radiation in Whittier, California and active in the NPI registry since January 2007. The organization lists Kevin Diao, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Whittier Oncology Medical Clinic, Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
4Medicare enrollment records show 4 clinicians reassign Medicare billing to Whittier Oncology Medical Clinic, Inc., which bills Medicare for the services they deliver. Of these, 2 practice at this address and 3 within 10 miles. They are listed nearest first.
Clinicians, nearest first (4)
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 Whittier Oncology Medical Clinic, Inc.'s NPI number?
The NPI number for Whittier Oncology Medical Clinic, Inc. is 1427101229. It was assigned to this organization in the NPPES registry on January 18, 2007.
Where is Whittier Oncology Medical Clinic, Inc. located?
Whittier Oncology Medical Clinic, Inc. is located at 12393 Washington Blvd, Whittier, CA 90606. The listed phone number is (562) 696-5964.
What is Whittier Oncology Medical Clinic, Inc.'s specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Oncology, Radiation, with taxonomy code 261QX0203X.
Is Whittier Oncology Medical Clinic, Inc. enrolled in Medicare?
Yes. Whittier Oncology Medical Clinic, Inc. is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Whittier Oncology Medical Clinic, Inc.?
According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians, all in Radiation Oncology, reassign their Medicare billing to Whittier Oncology Medical Clinic, Inc.. 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. Of these, 2 practice at this address and 3 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Whittier Oncology Medical Clinic, Inc. was last updated on February 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months 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.
# Whittier Oncology Medical Clinic, Inc. · NPI 1427101229
Oncology, Radiation organization in Whittier, California. Organization record, active in the CMS NPPES registry since January 18, 2007.
## Identity
- **NPI:** 1427101229 (Entity type: Organization)
- **Enumerated:** January 18, 2007
- **Primary specialty:** Clinic/Center - Oncology, Radiation · taxonomy 261QX0203X
- **Organization subpart:** No
- **Authorized official:** Kevin Diao, PRESIDENT
## Practice location
- **Address:** 12393 WASHINGTON BLVD, Whittier, CA 90606-2502
- **Phone:** (562) 696-5964 · **Fax:** (562) 693-6940
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 4 clinicians (Radiation Oncology) reassign Medicare billing to this organization (form CMS-855R); 2 practice at this address and 3 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 24, 2026
- **Other identifiers:** Medicaid ZZZ72741Z (CA); Other ZZZ72741Z (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1427101229) · Data from the CMS NPPES public registry.