ALEXANDER CHUONG NGUYEN D.O.
NPI 1265842470
Hospitalist in Irvine, CA
About Alexander Chuong Nguyen D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALEXANDER CHUONG NGUYEN D.O. (NPI 1265842470) is an individual hospitalist provider in Irvine, California, licensed in California (20A14372) and active in the NPI registry since April 2014. He is enrolled in Medicare PECOS, maintains 5 additional practice locations, and is a graduate of Touro Un Col Of Osteopathic Medicine, Henderson (2014).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Secondary Practice Locations 5
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Alexander Chuong Nguyen D.o. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Alexander Nguyen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Mission Viejo, CA 92691
- Reassigned Medicare billing, California enrollment
- 1,699 clinicians in this Medicare group
Tustin, CA 92780
- Reassigned Medicare billing, California enrollment
- 2,052 clinicians in this Medicare group
Los Angeles, CA 90059
- Reassigned Medicare billing, California enrollment
- 198 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.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92618 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
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 Alexander Nguyen's NPI number?
The NPI number for Alexander Nguyen is 1265842470. It was assigned to this individual provider in the NPPES registry on April 28, 2014. The provider is also known as Alex Chuong Nguyen.
Where is Alexander Nguyen located?
Alexander Nguyen practices at 11 Technology Dr, Irvine, CA 92618. The listed phone number is (949) 923-3200.
What is Alexander Nguyen's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Alexander Nguyen enrolled in Medicare?
Yes. Alexander Nguyen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Alexander Nguyen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Nguyen reassigns Medicare benefits to 3 organizations: Providence Medical Foundation (Mission Viejo, CA), Healthcare Partners Affiliates Medical Group (Tustin, CA) and Superior Hospitalist Medical Group Inc (Los Angeles, CA). Each 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 Alexander 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 Alexander Nguyen was last updated on January 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Alexander Chuong Nguyen, D.O. · NPI 1265842470
Hospitalist physician in Irvine, California. Individual provider, active in the CMS NPPES registry since April 28, 2014.
## Identity
- **NPI:** 1265842470 (Entity type: Individual)
- **Enumerated:** April 28, 2014
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 20A14372 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 11 TECHNOLOGY DR, Irvine, CA 92618-2302
- **Phone:** (949) 923-3200
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Providence Medical Foundation (NPI 1427305960, Mission Viejo, CA); Healthcare Partners Affiliates Medical Group (NPI 1891981502, Tustin, CA); Superior Hospitalist Medical Group Inc (NPI 1780047712, Los Angeles, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Touro Un Col Of Osteopathic Medicine, Henderson, class of 2014
## Record status
- **NPPES last updated:** January 4, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1265842470) · Data from the CMS NPPES public registry.