DR. LO AN T NGUYEN MD
NPI 1033284971
Internal Medicine in Reston, VA
About Dr. Lo An T Nguyen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LO AN T NGUYEN MD (NPI 1033284971) is an individual internal medicine provider in Reston, Virginia, licensed in Virginia (0101048232) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Lo An T Nguyen Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Lo An Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Mc Lean, VA 22102
- Reassigned Medicare billing, District of Columbia, Virginia and Maryland enrollments
- Also billed through NPI 1699893537 (Virginia), NPI 1285752121 (Maryland)
- 2,492 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 20190 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 12
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 Lo An Nguyen's NPI number?
The NPI number for Lo An Nguyen is 1033284971. It was assigned to this individual provider in the NPPES registry on November 22, 2006.
Where is Lo An Nguyen located?
Lo An Nguyen practices at 11445 Sunset Hills Road, Reston, VA 20190. The listed phone number is (703) 709-1500.
What is Lo An Nguyen's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Lo An Nguyen enrolled in Medicare?
Yes. Lo An Nguyen is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Lo An Nguyen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lo An Nguyen reassigns Medicare benefits to Kaiser Foundation Health Plan Of The Mid Atlantic States, Inc (Mc Lean, VA). 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 Lo An 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 Lo An Nguyen was last updated on May 16, 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.
# Dr. Lo An T Nguyen, MD · NPI 1033284971
Internal Medicine physician in Reston, Virginia. Individual provider, active in the CMS NPPES registry since November 22, 2006.
## Identity
- **NPI:** 1033284971 (Entity type: Individual)
- **Enumerated:** November 22, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 0101048232 (Virginia)
- **Sole proprietor:** No
## Practice location
- **Address:** 11445 SUNSET HILLS ROAD, Reston, VA 20190-5276
- **Phone:** (703) 709-1500 · **Fax:** (703) 709-1711
## 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:** Kaiser Foundation Health Plan Of The Mid Atlantic States, Inc (NPI 1376815472, Mc Lean, VA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** May 16, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1033284971) · Data from the CMS NPPES public registry.