ALAN SIU MD INC
NPI 1427880996
Neurological Surgery in Alhambra, CA
About Alan Siu Md Inc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALAN SIU MD INC (NPI 1427880996) is a healthcare organization registered as a neurological surgery in Alhambra, California and active in the NPI registry since August 2024. The organization lists Alan Siu, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Alan Siu Md Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Alan Siu MD Inc, 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 Alan Siu MD Inc's NPI number?
The NPI number for Alan Siu MD Inc is 1427880996. It was assigned to this organization in the NPPES registry on August 14, 2024.
Where is Alan Siu MD Inc located?
Alan Siu MD Inc is located at 1658 W. Valley Blvd Suite 210, Alhambra, CA 91803. The listed phone number is (571) 249-3327.
What is Alan Siu MD Inc's specialty?
The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.
Is Alan Siu MD Inc enrolled in Medicare?
Yes. Alan Siu MD Inc is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Alan Siu MD Inc?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Neurosurgery) reassigns their Medicare billing to Alan Siu MD 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Alan Siu MD Inc was last updated on February 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.