DIANA NHUNG TRAN M.D.
NPI 1114119328
Obstetrics & Gynecology in Fontana, CA
About Diana Nhung Tran M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DIANA NHUNG TRAN M.D. (NPI 1114119328) is an individual obstetrics & gynecology provider in Fontana, California, licensed in California (A92818) and active in the NPI registry since August 2007. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Diana Nhung Tran M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Diana Tran reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Redlands, CA 92373
- Reassigned Medicare billing, California enrollment
- 635 clinicians in this Medicare group
Greenville, SC 29607
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Obhg California PC
- 711 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 92335 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.
FONTANA, CA 92335
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 Diana Tran's NPI number?
The NPI number for Diana Tran is 1114119328. It was assigned to this individual provider in the NPPES registry on August 11, 2007. The provider is also known as Diana Nhung Tran M.D..
Where is Diana Tran located?
Diana Tran practices at 9961 Sierra Ave Mob 1, 3rd Floor, Fontana, CA 92335. The listed phone number is (909) 427-5000.
What is Diana Tran's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Diana Tran enrolled in Medicare?
Yes. Diana Tran is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Diana Tran's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Diana Tran reassigns Medicare benefits to 2 organizations: Beaver Medical Group P C (Redlands, CA) and Obhg California, P.C. (Greenville, SC). 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 Diana Tran'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 Diana Tran was last updated on July 24, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Diana Nhung Tran, M.D. · NPI 1114119328
Obstetrics & Gynecology physician in Fontana, California. Individual provider, active in the CMS NPPES registry since August 11, 2007.
## Identity
- **NPI:** 1114119328 (Entity type: Individual)
- **Enumerated:** August 11, 2007
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** A92818 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 9961 SIERRA AVE, MOB 1, 3RD FLOOR, Fontana, CA 92335-6720
- **Phone:** (909) 427-5000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Beaver Medical Group P C (NPI 1649503319, Redlands, CA); Obhg California, P.C. (NPI 1215258892, Greenville, SC) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 24, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1114119328) · Data from the CMS NPPES public registry.