DR. DAT TIEN NGUYEN MD
NPI 1659346435
Specialist in Modesto, CA
About Dr. Dat Tien Nguyen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DAT TIEN NGUYEN MD (NPI 1659346435) is an individual specialist in Modesto, California, licensed in California (G75447) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Minnesota Medical School (1990).
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 and accepts Medicare assignment
Dr. Dat Tien Nguyen Md 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 Dat Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Stockton, CA 95210
- Reassigned Medicare billing, California enrollment
- 20,078 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.
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.
MODESTO, CA 95356
MODESTO, CA 95356
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 Dat Nguyen's NPI number?
The NPI number for Dat Nguyen is 1659346435. It was assigned to this individual provider in the NPPES registry on February 23, 2006. The provider is also known as Dr. Dat Tein Nguyen MD.
Where is Dat Nguyen located?
Dat Nguyen practices at 4601 Dale Rd, Modesto, CA 95356. The listed phone number is (209) 735-4385.
What is Dat Nguyen's specialty?
The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.
Is Dat Nguyen enrolled in Medicare?
Yes. Dat 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 organization bills Medicare for Dat Nguyen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Dat Nguyen reassigns Medicare benefits to Permanente Medical Group Inc (Stockton, 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 Dat 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 Dat Nguyen was last updated on January 10, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Dr. Dat Tien Nguyen, MD · NPI 1659346435
Specialist provider in Modesto, California. Individual provider, active in the CMS NPPES registry since February 23, 2006.
## Identity
- **NPI:** 1659346435 (Entity type: Individual)
- **Enumerated:** February 23, 2006
- **Primary specialty:** Specialist · taxonomy 174400000X
- **State license:** G75447 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4601 DALE RD, Modesto, CA 95356-9718
- **Phone:** (209) 735-4385
## 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:** Permanente Medical Group Inc (NPI 1548343510, Stockton, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Minnesota Medical School, class of 1990
## Record status
- **NPPES last updated:** January 10, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1659346435) · Data from the CMS NPPES public registry.