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BRYAN CASSIM DOO, M.D., A MEDICAL CORPORATION
NPI 1962617332
Clinic/Center - Medical Specialty in Whittier, CA

Active since May 11, 2007
9209 COLIMA RD, SUITE 4500, WHITTIER, CA 90605(951) 278-5590(951) 272-9924 Get Directions Write a Review

NPPES record last updated: August 4, 2011. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Bryan Cassim Doo, M.d., A Medical Corporation NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

BRYAN CASSIM DOO, M.D., A MEDICAL CORPORATION (NPI 1962617332) is a healthcare organization registered as a medical specialty in Whittier, California and active in the NPI registry since May 2007. The organization lists Bryan Cassim Doo, President, as its authorized official.

NPPES Registry Identity

NPI1962617332
Entity TypeOrganization
Primary Taxonomy261QM2500X
Legal Business NameBRYAN CASSIM DOO, M.D., A MEDICAL CORPORATION
Location Address9209 COLIMA RD, SUITE 4500Whittier, CA 90605-1800
Mailing AddressP.o. Box 77790Corona, CA 92877-0126 · (951) 278-5590 · Fax (951) 272-9924
Phone(951) 278-5590
Fax(951) 272-9924
Organization SubpartNo
Authorized OfficialBryan Cassim DooPresident · (951) 278-5590
Enumeration DateMay 11, 2007
Last NPPES UpdateAugust 4, 2011
✔ NPI 1962617332 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · Medical SpecialtyAmbulatory Health Care Facilities
Taxonomy Code261QM2500X
License✔ Licensed in CA · A65648
Definition
An entity, facility, or distinct part of a facility providing diagnostic, treatment, and prescriptive services related to a specific area of medical specialization. Frequently used for Title V related Children's Specialty services or to meet specific public health needs (e.g., infectious diseases or breast and cervical cancer).
9209 COLIMA RD, Whittier, CA 90605
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Other Identifiers 3

Medicaid00A656480CA
Medicare ID-Type UnspecifiedA65648CA
Medicare UPINH52610CA

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)

Bryan Cassim Doo, M.d., A Medical Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by February 28, 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.

StateEnrollment IDDue date
StateCaliforniaEnrollment IDO20111025000721Non-DME Part B · Clinic/Group PracticeDue dateFebruary 28, 2027
Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Bryan Cassim Doo, M.D., A Medical Corporation, which bills Medicare for the services this clinician delivers.

Clinician (1)

Bryan Doo, M.D.
Infectious Disease
NPI 1962500058
9209 COLIMA RD SUITE 4500
Whittier, CA 90605
(562) 214-0130
✔ PECOS✔ Accepts MedicareSame address

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 Bryan Cassim Doo, M.D., A Medical Corporation's NPI number?

The NPI number for Bryan Cassim Doo, M.D., A Medical Corporation is 1962617332. It was assigned to this organization in the NPPES registry on May 11, 2007.

Where is Bryan Cassim Doo, M.D., A Medical Corporation located?

Bryan Cassim Doo, M.D., A Medical Corporation is located at 9209 Colima Rd Suite 4500, Whittier, CA 90605. The listed phone number is (951) 278-5590.

What is Bryan Cassim Doo, M.D., A Medical Corporation's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Medical Specialty, with taxonomy code 261QM2500X.

Is Bryan Cassim Doo, M.D., A Medical Corporation enrolled in Medicare?

Yes. Bryan Cassim Doo, M.D., A Medical Corporation is registered in the Medicare PECOS enrollment system.

When is Bryan Cassim Doo, M.D., A Medical Corporation'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 February 28, 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 Bryan Cassim Doo, M.D., A Medical Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Infectious Disease) reassigns their Medicare billing to Bryan Cassim Doo, M.D., A Medical Corporation. 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 Bryan Cassim Doo, M.D., A Medical Corporation was last updated on August 4, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.