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THIEN LONG, LLC
NPI 1174801609
Internal Medicine in Gaithersburg, MD

Active since August 02, 2011
4 PROFESSIONAL DR STE 133, GAITHERSBURG, MD 20879(301) 974-9625 Get Directions Write a Review

NPPES record last updated: August 14, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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

NPI1174801609
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameTHIEN LONG, LLC
Location Address4 PROFESSIONAL DR STE 133Gaithersburg, MD 20879-3426
Mailing Address4 Professional Dr, Suite 133Gaithersburg, MD 20879-3407 · (301) 974-9625
Phone(301) 974-9625
Organization SubpartNo
Authorized OfficialStephen NguyenPhysician · (301) 569-6176
Enumeration DateAugust 2, 2011
Last NPPES UpdateAugust 14, 2025
NPPES CertifiedAugust 14, 2025
✔ NPI 1174801609 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MD · D0063163
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
4 PROFESSIONAL DR STE 133, Gaithersburg, MD 20879
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

STEPHEN T. NGUYEN M.D.
Internal Medicine
4 PROFESSIONAL DR STE 133
GAITHERSBURG, MD 20879
Montgomery County (301) 974-9625

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.

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 12 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.