DR. BRIAN TZUNG M.D.
NPI 1437313582
Radiology - Diagnostic Radiology in Mission Viejo, CA
About Dr. Brian Tzung M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. BRIAN TZUNG M.D. (NPI 1437313582) is an individual diagnostic radiology provider in Mission Viejo, California, licensed in California (A95890) and active in the NPI registry since July 2008. He is enrolled in Medicare PECOS, maintains a secondary practice location in Rancho Mission Viejo, and is a graduate of Northwestern University Feinberg Medical School (2004).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 2
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
Dr. Brian Tzung M.d. 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
4Medicare enrollment records show Brian Tzung reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 38 clinicians in this Medicare group
Fullerton, CA 92835
- Reassigned Medicare billing, California enrollment
- 53 clinicians in this Medicare group
Northridge, CA 91325
- Reassigned Medicare billing, California enrollment
- 224 clinicians in this Medicare group
Oxnard, CA 93036
- Reassigned Medicare billing, California enrollment
- 62 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 75
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 92691 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.
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.
MISSION VIEJO, CA 92691
MISSION VIEJO, CA 92691
MISSION VIEJO, CA 92691
MISSION VIEJO, CA 92691
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 Brian Tzung's NPI number?
The NPI number for Brian Tzung is 1437313582. It was assigned to this individual provider in the NPPES registry on July 17, 2008.
Where is Brian Tzung located?
Brian Tzung practices at 27700 Medical Center Rd, Mission Viejo, CA 92691. The listed phone number is (949) 364-7744.
What is Brian Tzung's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Brian Tzung enrolled in Medicare?
Yes. Brian Tzung 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 Brian Tzung's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Brian Tzung reassigns Medicare benefits to 4 organizations: Moran Rowen And Dorsey Inc (Orange, CA), St Jude Radiology Medical Group Inc (Fullerton, CA), Renaissance Imaging Medical Associates, Inc. (Northridge, CA) and Palms Imaging Medical Group (Oxnard, 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 Brian Tzung'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 Brian Tzung was last updated on September 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 46 days 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.