Quick answers
- Does Leonard D. Potempa accept Medicare assignment?
- Yes. Medicare's clinician data says Leonard D. Potempa 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 D. Potempa see?
- In 2024, CMS data shows 619 Original Medicare patients and 1,981 services for Leonard D. Potempa. This counts Original Medicare only and measures volume, not quality.
- What is Leonard D. Potempa's NPI number?
- 1710984646. 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 D. Potempa, 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 | 619 |
|---|---|
| Services billed to Medicare | 1,981 |
| Different services or procedures | 25 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)452 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)378 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)300 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)168 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)162 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%
- Chronic kidney disease75%
- Arthritis61%
- Heart failure55%
- Diabetes53%
Hospitals where Leonard D. Potempa works
Medicare's Facility Affiliation Data lists Leonard D. Potempa 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.
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140242
- UChicago Medicine AdventHealth BolingbrookBolingbrook, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140304
- UChicago Medicine AdventHealth HinsdaleHinsdale, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140122
- UChicago Medicine AdventHealth La GrangeLa Grange, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140065
Practice locations
Addresses where Leonard D. Potempa is enrolled with Medicare (CMS data updated October 2, 2026).
- 800 Biesterfield RdElk Grove Village, IL 60007 (847) 981‑3680
- 901 Biesterfield Rd, Suite 310Elk Grove Village, IL 60007 (847) 952‑9332
Group practices
Medicare enrollment lists Leonard D. Potempa as a member of these groups (CMS data updated October 2, 2026).
- Nephrology Associates of Northern Illinois Ltd117 clinicians in the group
- Nani Elk Grove18 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in Elk Grove Village
Clinicians with the same Medicare primary specialty in Elk Grove Village, IL — not a recommendation.
Other clinicians in Nephrology Associates of Northern Illinois Ltd
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loyola University Of Chicago, Stritch School Of Medicine |
| Graduation year | 1982 (44 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) | 1710984646 |
| 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