Quick answers
- Does John T. Leyland Ii accept Medicare assignment?
- Yes. Medicare's clinician data says John T. Leyland Ii accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does John T. Leyland Ii see?
- In 2024, CMS data shows 374 Original Medicare patients and 3,692 services for John T. Leyland Ii. This counts Original Medicare only and measures volume, not quality.
- What is John T. Leyland Ii's NPI number?
- 1275678740. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for John T. Leyland Ii, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 374 |
|---|---|
| Services billed to Medicare | 3,692 |
| Different services or procedures | 55 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Leuprolide injectable, camcevi, 1 mg (J1952)1,302 services
- Urinalysis, manual test (81002)413 services
- Ultrasound measurement of bladder capacity after voiding (51798)391 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)376 services
- Leuprolide acetate (for depot suspension), 7.5 mg (J9217)99 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis41%
- Ischemic heart disease38%
- Diabetes35%
- Chronic kidney disease31%
Hospitals where John T. Leyland Ii works
Medicare's Facility Affiliation Data lists John T. Leyland Ii at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Advocate Illinois Masonic Medical CenterChicago, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140182
- AMITA Health Resurrection Medical CenterChicago, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140117
- Loyola Gottlieb Memorial HospitalMelrose Park, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140008
- Loyola University Medical CenterMaywood, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140276
- MacNeal HospitalBerwyn, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140054
Practice locations
Addresses where John T. Leyland Ii is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Erie Ct, Suite 4030Oak Park, IL 60302 (708) 386‑7888
- 3340 Oak Park Ave, Suite 305Berwyn, IL 60402 (708) 484‑6019
Group practices
Medicare enrollment lists John T. Leyland Ii as a member of this group (CMS data updated October 2, 2026).
- Metro Chicago Surgical Oncology LLC13 clinicians in the group
Specialties
- Urologyprimary
Other urologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Other clinicians in Metro Chicago Surgical Oncology LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Feinberg Medical School |
| Graduation year | 1997 (29 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1275678740 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians