Thien Tien, MD
NPI 1235699919 · Internal Medicine Physician · Danbury, CT
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thien Tien, MD is a Internal Medicine Physician provider in Danbury, CT (NPI 1235699919).
Provider details
- NPI number
- 1235699919
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 1.071186 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
957 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 592 | $83 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 131 | $86 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 65 | $126 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 60 | $122 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 55 | $138 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 28 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-03-20
- Last updated
- 2022-06-29
- Certified
- 2022-06-29
Frequently asked questions
- What is Thien Tien's NPI number?
- Thien Tien's National Provider Identifier (NPI) is 1235699919, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thien Tien's specialty?
- Thien Tien is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thien Tien located?
- Thien Tien's practice location on file with NPPES is 24 Hospital Ave, Danbury, CT 06810-6099.
- What is Thien Tien's phone number?
- The practice phone number listed in the NPPES registry for Thien Tien is (203) 739-8105.
- Does Thien Tien accept Medicare?
- Thien Tien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thien Tien's NPI active?
- Yes — Thien Tien's NPI (1235699919) is active in the NPPES registry as of the last update on 2022-06-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.