Quick answers
- Does Ronald J. Lee accept Medicare assignment?
- Yes. Medicare's clinician data says Ronald J. Lee 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 Ronald J. Lee see?
- In 2024, CMS data shows 310 Original Medicare patients and 595 services for Ronald J. Lee. This counts Original Medicare only and measures volume, not quality.
- What is Ronald J. Lee's NPI number?
- 1538935507. 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 Ronald J. Lee, 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 | 310 |
|---|---|
| Services billed to Medicare | 595 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)259 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)234 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)83 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%
- Ischemic heart disease59%
- Heart failure54%
- Arthritis52%
- Atrial fibrillation50%
Hospitals where Ronald J. Lee works
Medicare's Facility Affiliation Data lists Ronald J. Lee 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 Condell Medical CenterLibertyville, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140202
- Vista Medical Center EastWaukegan, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140084
Practice locations
Addresses where Ronald J. Lee is enrolled with Medicare (CMS data updated October 2, 2026).
- 1795 N Butterfield Rd, Suite 102Libertyville, IL 60048 (847) 360‑1000
- 801 S Milwaukee AveLibertyville, IL 60048 (847) 362‑2900
Group practices
Medicare enrollment lists Ronald J. Lee as a member of this group (CMS data updated October 2, 2026).
- North Lake Cardiovascular Center PC4 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Libertyville
Clinicians with the same Medicare primary specialty in Libertyville, IL — not a recommendation.
Other clinicians in North Lake Cardiovascular Center PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2023 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538935507 |
| 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