Dr. Leonard D. Potempa, MD
- Medicare services, 2024
- 1,938
- Medicare patients, 2024
- 619
- Part D claims, 2024
- 1,410
- Hospital affiliations
- 4
- Industry payments
- $551
- Practice address
- 5201 S Willow Springs Rd, La Grange Highlands, IL 60525
- Practice phone
- Call (630) 575-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Nephrology Associates of Northern Illinois, Ltd.
La Grange Highlands, Illinois
Find Dr. Potempa's professional email, personal email and mobile number
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Dr. Leonard D. Potempa is a nephrologist in La Grange Highlands, Illinois
Dr. Potempa practices at Nephrology Associates of Northern Illinois, Ltd. in La Grange Highlands, Illinois.
Dr. Potempa's NPI, 1710984646, was assigned on July 7, 2005. Dr. Potempa graduated from Loyola University of Chicago, Stritch School of Medicine in 1982. Dr. Potempa holds Illinois license 036066846.
- NPI
- 1710984646NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2668380056
- NPI enumeration date
- July 7, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (630) 575-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Leonard D. Potempa practices at Nephrology Associates of Northern Illinois, Ltd. in La Grange Highlands, Illinois
Dr. Potempa's primary practice is Nephrology Associates of Northern Illinois, Ltd., at 5201 S Willow Springs Rd, La Grange Highlands, IL 60525 in Cook County. The practice phone is (630) 575-5000.
- Nephrology Associates of Northern Illinois, Ltd.5201 S Willow Springs Rd, La Grange Highlands, IL 60525 · Cook CountyPhone(630) 575-5000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Leonard D. Potempa is affiliated with 11 sites of care and 2 medical groups
Dr. Potempa's primary practice is Nephrology Associates of Northern Illinois, Ltd. in La Grange Highlands, Illinois. Dr. Potempa is also affiliated with Northwestern Medicine Central DuPage Hospital. The medical group on file is Nephrology Associates of Northern Illinois and Indiana (NANI). Dmand AI also links Dr. Potempa to 3 more hospitals, 4 dialysis centers, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Leonard D. Potempa's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Potempa practices, 10 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Nephrology Associates of Northern Illinois, Ltd. | Available with a free account |
| +10 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Leonard D. Potempa is one of 534 nephrologists in Illinois
Nephrology is Dr. Potempa's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Potempa is licensed in Illinois.
Specialties and state licenses
- Nephrology, IllinoisPrimary
Nephrologists near Dr. Potempa
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Leonard D. Potempa billed Medicare for 1,938 services in 2024
CMS data shows 1,938 Medicare services from Dr. Potempa across 13 procedure codes in 2024, for 619 Medicare patients. Medicare paid $171,611 for them.
Dr. Potempa's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,8872024: 1,60515%
- Other services
- 2023: 02024: 168
- Tests and treatments
- 2023: 2692024: 16539%
- Lab and pathology
- 2023: 142024: 0100%
Where Dr. Potempa's Medicare services took place, 2024
- In an office80942%
- In a facility1,12958%
Dr. Potempa compared with the Illinois median for nephrologists, 2024
- Dr. Potempa
- Illinois median
- Medicare services
- 1,938vs 1,28451% above
- Medicare patients
- 619vs 35773% above
- Part D claims
- 1,172vs 5782.0 times
Medians across 526 nephrologists in Illinois with Dmand AI profiles that report each measure.
Dr. Potempa's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Potempa?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Potempa and other nephrologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Leonard D. Potempa treated 619 Medicare patients in 2024, average age 76
CMS counts 619 Medicare patients who saw Dr. Potempa in 2024. The largest group is 75 to 84, with 239 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 20% are also on Medicaid. Their average risk score is 3.69, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Potempa's median patient age at 75, with 44% women.
Dr. Potempa's Medicare patients by age, 2024
Dr. Potempa's Medicare patients by sex, 2024
- Women28646%
- Men33354%
Chronic conditions among Dr. Potempa's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Arthritis61%
- Heart failure55%
- Diabetes53%
- Ischemic heart disease53%
- Atrial fibrillation41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Potempa's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women44%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Leonard D. Potempa wrote 1,410 Medicare Part D claims in 2024
In 2024, Dr. Potempa wrote 1,410 Medicare Part D claims for 194 patients. 83% of them were for generic drugs. CMS names the drug for 1,172 of them, across 31 drugs with 11 or more claims each, at $493,194 in total drug cost. In 2023, CMS named 951 claims across 27 drugs.
Dr. Potempa's Part D claims by kind of drug, 2024
- Generic1,172 claims83%
- Brand-name238 claims17%
Dr. Potempa's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Potempa's Part D claims, 2024
- Antibiotics1%15 of 1,410 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 9512024: 1,17223%
Drugs named by CMS: 31 in 2024, 27 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Leonard D. Potempa offers telehealth to Medicare patients
Dr. Potempa accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Potempa as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Leonard D. Potempa received $551 in industry payments from 2017 to 2025
CMS Open Payments shows 27 general payments to Dr. Potempa from 11 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 99% of the total. Relypsa, Inc. paid the most, $123.
General payments to Dr. Potempa by program year, 2017 to 2025
General payments to Dr. Potempa by kind, 2017 to 2025
- Food and beverage$54899%
- Education$31%
Companies that paid Dr. Potempa the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Leonard D. Potempa graduated from Loyola University of Chicago, Stritch School of Medicine
Dr. Potempa graduated from Loyola University of Chicago, Stritch School of Medicine in 1982.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Leonard D. Potempa's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Leonard D. Potempa
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Leonard D. Potempa's NPI number?
Dr. Leonard D. Potempa's NPI number is 1710984646. It was assigned on July 7, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Leonard D. Potempa?
Dr. Leonard D. Potempa is a nephrologist in La Grange Highlands, Illinois. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Leonard D. Potempa practice?
Dr. Potempa practices at 5201 S Willow Springs Rd, La Grange Highlands, IL 60525. Dr. Potempa's primary practice is Nephrology Associates of Northern Illinois, Ltd. in La Grange Highlands, Illinois. Dmand AI also links Dr. Potempa to 3 hospitals, 4 dialysis centers, 2 group practices and clinics and 1 medical group.
What is Dr. Leonard D. Potempa's office phone number?
The practice phone on file for Dr. Potempa is (630) 575-5000.
What is Dr. Leonard D. Potempa's medical license number?
Dr. Potempa holds Illinois license 036066846.
Which hospitals is Dr. Leonard D. Potempa affiliated with?
Dr. Potempa is affiliated with Northwestern Medicine Central DuPage Hospital. Dmand AI links Dr. Potempa to 3 more hospitals.
What medical group is Dr. Leonard D. Potempa part of?
Dr. Potempa is linked to Nephrology Associates of Northern Illinois and Indiana (NANI). Dmand AI links Dr. Potempa to 1 more medical group.
Does Dr. Leonard D. Potempa accept Medicare?
Yes. CMS data shows Dr. Potempa billed Medicare for 1,938 services in 2024, and Dr. Potempa accepts Medicare assignment.
Does Dr. Leonard D. Potempa offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Potempa as offering telehealth services.
How many Medicare patients does Dr. Leonard D. Potempa see?
CMS counts 619 Medicare patients who saw Dr. Potempa in 2024, with an average age of 76.
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What services does Dr. Leonard D. Potempa bill to Medicare?
In 2024, Dr. Potempa's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and office visit, established patient (99214).
Where did Dr. Leonard D. Potempa go to medical school?
Dr. Potempa graduated from Loyola University of Chicago, Stritch School of Medicine in 1982.
What drugs does Dr. Leonard D. Potempa prescribe most?
In 2024 Medicare Part D data, Dr. Potempa's most prescribed drugs by claims were Spironolactone, Losartan Potassium and Amlodipine Besylate.
Has Dr. Leonard D. Potempa received payments from drug or device companies?
CMS Open Payments shows $551 in general payments to Dr. Potempa from 11 companies from 2017 to 2025. The largest total came from Relypsa, Inc.
How long has Dr. Leonard D. Potempa been practicing?
Dr. Potempa graduated from medical school in 1982, 44 years ago.
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