ALAN SIU MD INC
NPI 1427880996
Neurological Surgery in Alhambra, CA

Active since August 14, 2024
1658 W. VALLEY BLVD, SUITE 210, ALHAMBRA, CA 91803(571) 249-3327 Get Directions Write a Review

NPPES record last updated: February 5, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Feb 5, 2026, Dec 8, 2024, Aug 19, 2024 and 1 more (4 updates tracked since 2024).

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

NPI1427880996
Entity TypeOrganization
Primary Taxonomy207T00000X
Legal Business NameALAN SIU MD INC
Location Address1658 W. VALLEY BLVD, SUITE 210Alhambra, CA 91803
Mailing Address3154 Glendale Blvd # 1216Los Angeles, CA 90039-1830
Organization SubpartNo
Authorized OfficialAlan SiuPresident · (571) 249-3327
Enumeration DateAugust 14, 2024
Last NPPES UpdateFebruary 5, 20264 updates tracked since enumeration
NPPES CertifiedFebruary 5, 2026
✔ NPI 1427880996 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNeurological SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207T00000X
Definition
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.
1658 W. VALLEY BLVD, Alhambra, CA 91803

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

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)

Neurosurgery
NPI 1306073457
300 HILLMONT AVE BLDG 340, STE 401
Ventura, CA 93003
(805) 648-9830
✔ PECOS✔ Accepts Medicare65 mi

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.