Quick answers
- Does Glenn T. Leonard Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says Glenn T. Leonard Jr. 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 Glenn T. Leonard Jr. see?
- In 2024, CMS data shows 17 Original Medicare patients and 71 services for Glenn T. Leonard Jr.. This counts Original Medicare only and measures volume, not quality.
- What is Glenn T. Leonard Jr.'s NPI number?
- 1194766659. 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 Glenn T. Leonard Jr., 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 | 17 |
|---|---|
| Services billed to Medicare | 71 |
| Different services or procedures | 11 |
| Participating Medicare provider | Yes |
| Average age of these patients | 40 |
Most frequent services
- Ultrasound of heart for congenital defect (93303)13 services
- Ultrasound of heart blood flow, valves and chambers (93320)13 services
- Ultrasound of heart with color-depicted blood flow, rate and valve function (93325)13 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)13 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)12 services
Practice locations
Addresses where Glenn T. Leonard Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 601 Elmwood AveRochester, NY 14642 (585) 275‑6108
- 936 Delaware Ave, Suite 100Buffalo, NY 14209 (716) 885‑5437
Group practices
Medicare enrollment lists Glenn T. Leonard Jr. as a member of these groups (CMS data updated October 2, 2026).
- Pediatric Cardiology14 clinicians in the group
- Pediatric Cardiology Associates of Wny LLC3 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in New York →
Other cardiologists in Rochester
Clinicians with the same Medicare primary specialty in Rochester, NY — not a recommendation.
Other clinicians in Pediatric Cardiology
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1997 (29 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1194766659 |
| 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
- 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