1. Home
  2. Directory
  3. California
  4. Orange
  5. Psychiatry Neurology
  6. NPI Profile

HOANG DAO NGUYEN M.D.
NPI 1841240769
Psychiatry & Neurology - Child & Adolescent Psychiatry in Orange, CA

Active since May 11, 2006PECOS Enrolled
455 S MAIN ST, DEPT OF PSYCHIATRY, ORANGE, CA 92868(714) 532-8481 Get Directions Write a Review

NPPES record last updated: June 13, 2013. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Hoang Dao Nguyen M.d. NPPES

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

HOANG DAO NGUYEN M.D. (NPI 1841240769) is an individual child & adolescent psychiatry provider in Orange, California, licensed in California (A69179) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1841240769
Entity TypeIndividualMale
Primary Taxonomy2084P0804X
Provider Legal NameHOANG DAO NGUYENCredential: M.D.
Location Address455 S MAIN ST, DEPT OF PSYCHIATRYOrange, CA 92868-3835
Mailing Address16027 Brookhurst St, Suite I 153Fountain Valley, CA 92708-1551
Phone(714) 532-8481
Sole ProprietorYes
Enumeration DateMay 11, 2006
Last NPPES UpdateJune 13, 2013
✔ NPI 1841240769 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · Child & Adolescent PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0804X
License✔ Licensed in CA · A69179
Definition
Child & Adolescent Psychiatry is a subspecialty of psychiatry with additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.
Also ListedPsychiatry & Neurology · PsychiatryTaxonomy 2084P0800X · License A69179 (CA)
455 S MAIN ST, Orange, CA 92868
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Hoang Dao Nguyen M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Hoang Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

State Of California - Department Of Developmental Services
9.4 mi
General Acute Care Hospital
2501 HARBOR BLVD
Costa Mesa, CA 92626
  • Reassigned Medicare billing, California enrollment
  • 69 clinicians in this Medicare group
NPI 1225089592 (714) 957-5000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PEDIATRIC SUBSPECIALTY FACULTY, INC.
Surgery (Pediatric Surgery)
455 S MAIN ST, GENERAL SURGERY
ORANGE, CA 92868
Orange County (714) 364-4050
PEI LIN CHANG M.D.
Pediatrics
455 S MAIN ST
ORANGE, CA 92868
Orange County (714) 558-2462
JENNIFER MICHELLE SHIVELY N.P.
Nurse Practitioner (Pediatrics, Critical Care)
455 S MAIN ST
ORANGE, CA 92868
Orange County (714) 204-3277
ANTOINE SOLIMAN M.D.
Pediatrics (Neonatal-Perinatal Medicine)
455 S MAIN ST
ORANGE, CA 92868
Orange County (714) 289-4511
DR. JEFFREY H HO D.O.
Pediatrics (Pediatric Gastroenterology)
455 S MAIN ST
ORANGE, CA 92868
Orange County (714) 289-4099
DR. MARITA FORTADES MD
Pediatrics
455 S MAIN ST
ORANGE, CA 92868
Orange County (714) 532-8767
DR. SHARON KIM MD
Psychiatry & Neurology (Neurology)
455 S MAIN ST
ORANGE, CA 92868
Orange County (714) 532-7601
MS. NANCY ANN VARNI CPNP
Nurse Practitioner (Pediatrics)
455 S MAIN ST
ORANGE, CA 92868
Orange County (714) 532-8634

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 Hoang Nguyen's NPI number?

The NPI number for Hoang Nguyen is 1841240769. It was assigned to this individual provider in the NPPES registry on May 11, 2006.

Where is Hoang Nguyen located?

Hoang Nguyen practices at 455 S Main St Dept Of Psychiatry, Orange, CA 92868. The listed phone number is (714) 532-8481.

What is Hoang Nguyen's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Child & Adolescent Psychiatry, with taxonomy code 2084P0804X.

Is Hoang Nguyen enrolled in Medicare?

Yes. Hoang Nguyen is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Hoang Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hoang Nguyen reassigns Medicare benefits to State Of California - Department Of Developmental Services (Costa Mesa, 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 Hoang 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 Hoang Nguyen was last updated on June 13, 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.