THIEN LONG, LLC
NPI 1174801609
Internal Medicine in Gaithersburg, MD
About Thien Long, Llc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THIEN LONG, LLC (NPI 1174801609) is a healthcare organization registered as an internal medicine in Gaithersburg, Maryland and active in the NPI registry since August 2011. The organization lists Stephen Nguyen, Physician, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Thien Long, Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Thien Long, LLC, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Thien Long, LLC's NPI number?
The NPI number for Thien Long, LLC is 1174801609. It was assigned to this organization in the NPPES registry on August 2, 2011.
Where is Thien Long, LLC located?
Thien Long, LLC is located at 4 Professional Dr Ste 133, Gaithersburg, MD 20879. The listed phone number is (301) 974-9625.
What is Thien Long, LLC's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Thien Long, LLC enrolled in Medicare?
Yes. Thien Long, LLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Thien Long, LLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Thien Long, LLC. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Thien Long, LLC was last updated on August 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.