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Dr. Jack Leya, MD

Gastroenterology (Gastroenterology Physician)

2160 S First Ave, (fahey Bldg., Rm. 007)
Maywood, IL 60153

Who else practices at this address →

Cook County includes primary care (3% of residents) and mental health (4% of residents) shortage areas. About shortage areas

Call (708) 216-3307

  • Medicare participating

At a glance

Years since graduation
45
In the NPI registry since
2006
Medicare patients seen, 2024
165

Licensed in Illinois since 1983, according to the Illinois Department of Financial and Professional Regulation. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.

The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is

Education and training

  • 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier

Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).

Specialties and state licenses

  • Gastroenterology Physician primary
    IL license 036066173 (first issued 1983; active)
  • Internal Medicine Physician
    IL license 036066173 (first issued 1983; active)

As reported to the NPI registry. To confirm a license is current, check the state medical board.

Map: Gastroenterology per capita by county →

Where they work

Hospitals

Medical groups

Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.

Medicare patients and services

Medicare patients, 2024
165
Services billed
311
Patients’ average age
74
Most frequent Medicare services, 2023
ServiceTimesPatients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope2525
Removal of polyps or growths of large bowel using an endoscope with mechanical snare2424
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito1212
Biopsy of large bowel using a flexible endoscope1111

Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.

Medicare prescriptions

Most prescribed drugs, Medicare Part D 2024
DrugPrescriptions
Sod Sulf-Potass Sulf-Mag Sulf (sodium, potassium,mag sulfates)
Other prescribers in Maywood, IL
13

Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.

Other Gastroenterology clinicians in Maywood

Sources

NPI registry (CMS NPPES, November 2026; record last updated July 9, 2026), Medicare Care Compare, Medicare Physician & Other Practitioners (2024), Medicare Part D Prescribers (2024) and Open Payments (2025). Information is self-reported or billed data and may be out of date; call before visiting.

NPI 1336128602. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.