TIEN T NGUYEN M.D. INC.
NPI 1063534204
Neurological Surgery in Fountain Valley, CA
About Tien T Nguyen M.d. Inc. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TIEN T NGUYEN M.D. INC. (NPI 1063534204) is a healthcare organization registered as a neurological surgery in Fountain Valley, California and active in the NPI registry since April 2007. The organization lists Tien T Nguyen, 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)
Tien T Nguyen M.d. Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
2Medicare enrollment records show 2 clinicians reassign Medicare billing to Tien T Nguyen M.D. Inc., which bills Medicare for the services they deliver. Of these, 2 practice within 10 miles. They are listed nearest first.
Clinicians, nearest first (2)
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 Tien T Nguyen M.D. Inc.'s NPI number?
The NPI number for Tien T Nguyen M.D. Inc. is 1063534204. It was assigned to this organization in the NPPES registry on April 6, 2007.
Where is Tien T Nguyen M.D. Inc. located?
Tien T Nguyen M.D. Inc. is located at 11190 Warner Ave Suite 305, Fountain Valley, CA 92708. The listed phone number is (714) 433-2000.
What is Tien T Nguyen M.D. Inc.'s specialty?
The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.
Is Tien T Nguyen M.D. Inc. enrolled in Medicare?
Yes. Tien T Nguyen M.D. Inc. is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Tien T Nguyen M.D. Inc.?
According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians, all in Neurosurgery, reassign their Medicare billing to Tien T Nguyen M.D. 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 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 Tien T Nguyen M.D. Inc. was last updated on January 28, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.