DR. MARK V. HUNG NGUYEN ED.D. PSY.D.
NPI 1487288619
Psychologist in Garden Grove, CA
About Dr. Mark V. Hung Nguyen Ed.d. Psy.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK V. HUNG NGUYEN ED.D. PSY.D. (NPI 1487288619) is an individual psychologist in Garden Grove, California, licensed in California (29174) and active in the NPI registry since February 2020. He is enrolled in Medicare PECOS and is a graduate of Other (2014).
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Mark V. Hung Nguyen Ed.d. Psy.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mark Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Walnut Creek, CA 94598
- Reassigned Medicare billing, California enrollment
- 137 clinicians in this Medicare group
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 Mark Nguyen's NPI number?
The NPI number for Mark Nguyen is 1487288619. It was assigned to this individual provider in the NPPES registry on February 26, 2020.
Where is Mark Nguyen located?
Mark Nguyen practices at 14152 Bowen St, Garden Grove, CA 92843. The listed phone number is (714) 724-5722.
What is Mark Nguyen's specialty?
The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.
Is Mark Nguyen enrolled in Medicare?
Yes. Mark Nguyen is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mark Nguyen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Nguyen reassigns Medicare benefits to Integrated Pain Management Medical Group, Inc. (Walnut Creek, CA). The 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 Mark Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Mark Nguyen was last updated on February 11, 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.