TO DUNG KHONG NGUYEN M.D.
NPI 1790044642
Hospitalist in Palo Alto, CA
About To Dung Khong Nguyen M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TO DUNG KHONG NGUYEN M.D. (NPI 1790044642) is an individual hospitalist provider in Palo Alto, California, licensed in California (A128196) and active in the NPI registry since May 2012. She is enrolled in Medicare PECOS and maintains a secondary practice location in Anaheim.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
To Dung Khong Nguyen M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
6Medicare enrollment records show To Dung Nguyen reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Palo Alto, CA 94304
- Reassigned Medicare billing, California enrollment
- 3,617 clinicians in this Medicare group
Palo Alto, CA 94306
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1588721500 (California), NPI 1629301346 (California)
- 2,460 clinicians in this Medicare group
Modesto, CA 95350
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Valley Childrens Medical Group
- 387 clinicians in this Medicare group
Madera, CA 93636
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Valley Childrens Specialty Medical Group Inc
- 63 clinicians in this Medicare group
Delano, CA 93215
- Reassigned Medicare billing, California enrollment
- 135 clinicians in this Medicare group
Bakersfield, CA 93311
- Reassigned Medicare billing, California enrollment
- 200 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 94304 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.
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 To Dung Nguyen's NPI number?
The NPI number for To Dung Nguyen is 1790044642. It was assigned to this individual provider in the NPPES registry on May 14, 2012.
Where is To Dung Nguyen located?
To Dung Nguyen practices at 725 Welch Rd, Palo Alto, CA 94304. The listed phone number is (650) 497-8000.
What is To Dung Nguyen's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is To Dung Nguyen enrolled in Medicare?
Yes. To Dung Nguyen is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for To Dung Nguyen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), To Dung Nguyen reassigns Medicare benefits to 6 organizations: Lpch Medical Group Div Of Lucile (Palo Alto, CA), County Of Santa Clara (Palo Alto, CA), Valley Children's Medical Group (Modesto, CA), Valley Children's Specialty Medical Group, Inc. (Madera, CA), Adventist Health Delano (Delano, CA) and 1 more organization, listed in the Medicare section above. 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 To Dung 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 To Dung Nguyen was last updated on May 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# To Dung Khong Nguyen, M.D. · NPI 1790044642
Hospitalist physician in Palo Alto, California. Individual provider, active in the CMS NPPES registry since May 14, 2012.
## Identity
- **NPI:** 1790044642 (Entity type: Individual)
- **Enumerated:** May 14, 2012
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** A128196 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 725 WELCH RD, Palo Alto, CA 94304-1601
- **Phone:** (650) 497-8000
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Lpch Medical Group Div Of Lucile (NPI 1417907940, Palo Alto, CA); County Of Santa Clara (NPI 1144330614, Palo Alto, CA); Valley Children's Medical Group (NPI 1437555265, Modesto, CA); Valley Children's Specialty Medical Group, Inc. (NPI 1013968296, Madera, CA); Adventist Health Delano (NPI 1578798047, Delano, CA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** May 14, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1790044642) · Data from the CMS NPPES public registry.