NINA X TRINH M.D.
NPI 1811915333
Internal Medicine - Rheumatology in La Palma, CA
About Nina X Trinh M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NINA X TRINH M.D. (NPI 1811915333) is an individual rheumatology provider in La Palma, California, licensed in California (A64931) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS and is a graduate of Hahneman Medical College Of The Pacific (1996).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 3
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
Nina X Trinh 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 Reassignment
Medicare enrollment records show Nina Trinh reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Fullerton, CA 92833
- Reassigned Medicare billing, California enrollment
- 13,921 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90623 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
LA PALMA, CA 90623
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 Nina Trinh's NPI number?
The NPI number for Nina Trinh is 1811915333. It was assigned to this individual provider in the NPPES registry on July 17, 2006.
Where is Nina Trinh located?
Nina Trinh practices at 5451 La Palma Ave Suite 25, La Palma, CA 90623. The listed phone number is (714) 670-1340.
What is Nina Trinh's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Nina Trinh enrolled in Medicare?
Yes. Nina Trinh 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 organization bills Medicare for Nina Trinh's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nina Trinh reassigns Medicare benefits to Southern California Permanente Medical Group (Fullerton, 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 Nina Trinh'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 Nina Trinh was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Nina X Trinh, M.D. · NPI 1811915333
Rheumatology physician in La Palma, California. Individual provider, active in the CMS NPPES registry since July 17, 2006.
## Identity
- **NPI:** 1811915333 (Entity type: Individual)
- **Enumerated:** July 17, 2006
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **State license:** A64931 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 5451 LA PALMA AVE, SUITE 25, La Palma, CA 90623-1728
- **Phone:** (714) 670-1340 · **Fax:** (714) 443-3780
## 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:** Southern California Permanente Medical Group (NPI 1336556059, Fullerton, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Hahneman Medical College Of The Pacific, class of 1996
## Record status
- **NPPES last updated:** March 7, 2023
- **Other identifiers:** Other DA5312 (CA); Other A64931 (CA); Medicaid 00A649310 (CA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1811915333) · Data from the CMS NPPES public registry.