Leon Tsai, M.D.
NPI 1912983883 · Gastroenterology Physician · Tucson, AZ
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leon Tsai, M.D. is a Gastroenterology Physician provider in Tucson, AZ (NPI 1912983883).
Provider details
- NPI number
- 1912983883
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- 29869 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
846 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 134 | $118 |
| Colorectal Cancer Screening; Colonoscopy on Individual at High RiskG0105 | 116 | $163 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 110 | $117 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 96 | $221 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 72 | $103 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 333 | 331 |
| Pantoprazole Sodium | 150 | 65 |
| Famotidine | 143 | 56 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 80 | 76 |
| Dicyclomine Hcl | 69 | 28 |
| Omeprazole | 68 | 25 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,175 across 55 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-21
- Last updated
- 2007-07-09
Frequently asked questions
- What is Leon Tsai's NPI number?
- Leon Tsai's National Provider Identifier (NPI) is 1912983883, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leon Tsai's specialty?
- Leon Tsai is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Leon Tsai located?
- Leon Tsai's practice location on file with NPPES is 7566 N La Cholla Blvd, Tucson, AZ 85741-2307.
- What is Leon Tsai's phone number?
- The practice phone number listed in the NPPES registry for Leon Tsai is (520) 742-4139.
- Does Leon Tsai accept Medicare?
- Leon Tsai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leon Tsai's NPI active?
- Yes — Leon Tsai's NPI (1912983883) is active in the NPPES registry as of the last update on 2007-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.