Louis Tsai, M.D.
NPI 1841435468 · Diagnostic Radiology Physician · Brooklyn, NY
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Louis Tsai, M.D. is a Diagnostic Radiology Physician provider in Brooklyn, NY (NPI 1841435468).
Provider details
- NPI number
- 1841435468
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 238392 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 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
2,472 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) |
|---|---|---|
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 248 | $94 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 224 | $165 |
| Complete Ultrasound Scan of Abdomen76700 | 212 | $71 |
| Mri Scan of Abdomen Before and After Contrast74183 | 187 | $185 |
| Ct Scan of Abdomen and Pelvis Without Contrast74176 | 140 | $91 |
| Ct Scan of Abdomen and Pelvis Without Contrast |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-12-10
- Last updated
- 2024-01-03
- Certified
- 2024-01-03
Frequently asked questions
- What is Louis Tsai's NPI number?
- Louis Tsai's National Provider Identifier (NPI) is 1841435468, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Louis Tsai's specialty?
- Louis Tsai is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Louis Tsai located?
- Louis Tsai's practice location on file with NPPES is 506 6th St, Brooklyn, NY 11215-3609.
- What is Louis Tsai's phone number?
- The practice phone number listed in the NPPES registry for Louis Tsai is (718) 780-5950.
- Does Louis Tsai accept Medicare?
- Louis Tsai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Louis Tsai's NPI active?
- Yes — Louis Tsai's NPI (1841435468) is active in the NPPES registry as of the last update on 2024-01-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.