Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Thien Long, LLC

Organization Internal Medicine Physician · NPI 1174801609

Thien Long, LLC is an Internal Medicine Physician in Gaithersburg, Maryland. Licensed in Maryland. Registered with an NPI since 2011.

Licensed in
MD
In the registry since
2011
What do these letters mean?
LLC — Limited liability company
A form of business registration, not a clinical qualification.

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Practice location Address checks out

4 Professional Dr Ste 133
Gaithersburg, MD 20879-3426
Phone: (301) 974-9625
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence D0063163 (MD)

Record details

NPI number1174801609
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Stephen Nguyen — Physician · (301) 569-6176
NPI enumeratedAugust 2, 2011
Last updated in NPPESAugust 14, 2025
Certification dateAugust 14, 2025
Mailing address4 Professional Dr, Suite 133, Gaithersburg, MD 20879-3407

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