Quick answers
- Does Leonard J. Keller Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says Leonard J. Keller 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 Leonard J. Keller Jr. see?
- In 2024, CMS data shows 365 Original Medicare patients and 749 services for Leonard J. Keller Jr.. This counts Original Medicare only and measures volume, not quality.
- What is Leonard J. Keller Jr.'s NPI number?
- 1881154920. 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 Leonard J. Keller 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 | 365 |
|---|---|
| Services billed to Medicare | 749 |
| Different services or procedures | 25 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)324 services
- Emergency department visit with high level of medical decision making (99285)291 services
- Critical care, first 30-74 minutes (99291)72 services
- Emergency department visit with moderate level of medical decision making (99284)26 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%
- Arthritis63%
- Ischemic heart disease54%
- Diabetes48%
- Chronic kidney disease48%
Hospitals where Leonard J. Keller Jr. works
Medicare's Facility Affiliation Data lists Leonard J. Keller Jr. 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.
- University Hospitals - Elyria Medical CenterElyria, OH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 360145
Practice locations
Addresses where Leonard J. Keller Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 630 E River StElyria, OH 44035 (240) 686‑2300
- 6847 N Chestnut StRavenna, OH 44266 (240) 686‑2300
Group practices
Medicare enrollment lists Leonard J. Keller Jr. as a member of this group (CMS data updated October 2, 2026).
- Physicians Link Center LLC47 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Elyria
Clinicians with the same Medicare primary specialty in Elyria, OH — not a recommendation.
Other clinicians in Physicians Link Center LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University |
| Graduation year | 2019 (7 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1881154920 |
| 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