Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. LEON TSAI M.D.
NPI 1912983883
Internal Medicine - Gastroenterology in Tucson, AZ

Q: What is Leon Tsai's NPI number?

The NPI number for Leon Tsai is 1912983883. It was assigned to this individual provider in the NPPES registry on December 21, 2005.

Q: What is Leon Tsai's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for Leon Tsai was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 24 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since December 21, 2005PECOS Enrolled

25.63/100

CMS Quality Rating

7566 N LA CHOLLA BLVD, STE A, TUCSON, AZ 85741(520) 742-4139(520) 742-9618 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

On this page

About Dr. Leon Tsai M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. LEON TSAI M.D. (NPI 1912983883) is an individual gastroenterology provider in Tucson, Arizona, licensed in Arizona (29869) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1912983883

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. LEON TSAICredential: M.D.

Location Address7566 N LA CHOLLA BLVD, STE ATucson, AZ 85741-2307

Mailing Address7566 N La Cholla Blvd, Ste ATucson, AZ 85741-2307 · (520) 742-4139 · Fax (520) 742-9618

Phone(520) 742-4139

Fax(520) 742-9618

Sole ProprietorNo

Enumeration DateDecember 21, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1912983883 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in AZ · 29869

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

7566 N LA CHOLLA BLVD, Tucson, AZ 85741

Open in Google Maps ↗

Other Identifiers 4

OtherAZ0899000AZ · Blue Cross Blue Shield Az

Medicaid633801AZ

Other4116337AZ · Aetna

Other1Z6413AZ · Healthnet

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Blue Cross Blue Shield of Arizona.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Leon Tsai M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 12

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

134 services131 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

116 services116 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

110 services100 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

96 services96 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

72 services72 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

70 services70 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

60 services56 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

56 services56 patients

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk G0121

Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.

51 services51 patients

Dilation of esophagus 43450

Dilation of the esophagus is a procedure aimed to stretch or open up your esophagus (the tube connecting your mouth to your stomach) when it's narrow. It helps to improve swallowing and alleviate discomfort. It's typically performed using a flexible tube or balloon, under sedation.

50 services50 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

19 services18 patients

Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43235

This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.

12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85741 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$127.71 typical visit price

range $55.44 – $168.60

Typical copayment $31.92 (range $13.86 – $42.15)

Most-billed visit code 99204

Established Patient

$98.00 typical visit price

range $17.72 – $137.41

Typical copayment $24.50 (range $4.43 – $34.35)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

25.63/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Individually scored

Quality

Improvement Activities

Cost

85.44

Other Providers at the Same Location NPPES 11

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. ANNE M ELLIOTT PA

Physician Assistant

7566 N LA CHOLLA BLVD, SUITE A
TUCSON, AZ 85741

Pima County (520) 742-4139

ARIZONA GASTROENTEROLOGY LTD

Internal Medicine (Gastroenterology)

7566 N LA CHOLLA BLVD, STE A
TUCSON, AZ 85741

Pima County (520) 742-4139

KYLEIGH STAPLES FNP-C

Nurse Practitioner (Family)

7566 N LA CHOLLA BLVD
TUCSON, AZ 85741

Pima County (520) 742-4139

DR. BRYAN CONTRERAS M.D.

Internal Medicine (Gastroenterology)

7566 N LA CHOLLA BLVD, STE A
TUCSON, AZ 85741

Pima County (520) 742-4139

DR. SCOTT EDWARD BLINKOFF M.D.

Internal Medicine (Gastroenterology)

7566 N LA CHOLLA BLVD, STE A
TUCSON, AZ 85741

Pima County (520) 742-4139

HI FLOW ANESTHESIA LLC

Nurse Anesthetist, Certified Registered

7566 N LA CHOLLA BLVD
TUCSON, AZ 85741

Pima County (520) 742-4139

DR. JAMES PATRICK DINNING M.D.

Internal Medicine (Gastroenterology)

7566 N LA CHOLLA BLVD, STE A
TUCSON, AZ 85741

Pima County (520) 742-4139

KATHLEEN A. PIOTROWSKI APRN-CRNA

Nurse Anesthetist, Certified Registered

7566 N LA CHOLLA BLVD
TUCSON, AZ 85741

Pima County (520) 547-5847

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Leon Tsai's NPI number?

The NPI number for Leon Tsai is 1912983883. It was assigned to this individual provider in the NPPES registry on December 21, 2005.

Where is Leon Tsai located?

Leon Tsai practices at 7566 N La Cholla Blvd Ste A, Tucson, AZ 85741. The listed phone number is (520) 742-4139.

What is Leon Tsai's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Leon Tsai enrolled in Medicare?

Yes. Leon Tsai is registered in the Medicare PECOS enrollment system.

What insurance does Leon Tsai accept?

Health plans from Ambetter from Arizona Complete Health and Blue Cross Blue Shield of Arizona list Leon Tsai as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Leon Tsai was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 24 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.