Thien Long, LLC
NPI 1174801609 · Internal Medicine Physician · Gaithersburg, MD
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thien Long, LLC is a Internal Medicine Physician organization in Gaithersburg, MD (NPI 1174801609).
Provider details
- NPI number
- 1174801609
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Stephen Nguyen, Physician(301) 569-6176
- License
- D0063163 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-08-02
- Last updated
- 2025-08-14
- Certified
- 2025-08-14
Frequently asked questions
- What is Thien Long, LLC's NPI number?
- Thien Long, LLC's National Provider Identifier (NPI) is 1174801609, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Thien Long, LLC?
- Thien Long, LLC is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thien Long, LLC located?
- Thien Long, LLC's practice location on file with NPPES is 4 Professional Dr Ste 133, Gaithersburg, MD 20879-3426.
- What is Thien Long, LLC's phone number?
- The practice phone number listed in the NPPES registry for Thien Long, LLC is (301) 974-9625.
- Does Thien Long, LLC accept Medicare?
- Thien Long, LLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Thien Long, LLC?
- The authorized official listed on Thien Long, LLC's NPPES record is Stephen Nguyen, Physician. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Thien Long, LLC's NPI active?
- Yes — Thien Long, LLC's NPI (1174801609) is active in the NPPES registry as of the last update on 2025-08-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.