LEONARD POTEMPA MD
NPI 1710984646
Internal Medicine - Nephrology in La Grange Highlands, IL

Q: What is Leonard Potempa's NPI number?

The NPI number for Leonard Potempa is 1710984646. It was assigned to this individual provider in the NPPES registry on July 7, 2005.

Q: What is Leonard Potempa's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Q: When was this NPI record last updated?

The NPPES record for Leonard Potempa was last updated on April 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 07, 2005PECOS EnrolledAccepts Medicare Assignment

5201 WILLOW SPRINGS RD, SUITE 260, LA GRANGE HIGHLANDS, IL 60525(708) 354-1306(708) 354-1538 Get Directions Write a Review

NPPES record last updated: April 29, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 25, 2023, Dec 15, 2021, Nov 5, 2020 (3 updates tracked since 2020).

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About Leonard Potempa Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

LEONARD POTEMPA MD (NPI 1710984646) is an individual nephrology provider in La Grange Highlands, Illinois, licensed in Illinois (036066846) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS, is affiliated with Adventist La Grange Memorial Hospital, and maintains a secondary practice location in Lombard.

NPPES Registry Identity

NPI1710984646

Entity TypeIndividualMale

Primary Taxonomy207RN0300X

Provider Legal NameLEONARD POTEMPACredential: MD

Location Address5201 WILLOW SPRINGS RD, SUITE 260La Grange Highlands, IL 60525-6537

Mailing Address120 W 22nd St Ste 200Oak Brook, IL 60523-1563 · (630) 573-5000

Phone(708) 354-1306

Fax(708) 354-1538

Sole ProprietorNo

Medical School CMSLoyola University Of Chicago, Stritch School Of MedicineGraduated 1982

Enumeration DateJuly 7, 2005

Last NPPES UpdateApril 29, 20253 updates tracked since enumeration

NPPES CertifiedApril 29, 2025

✔ NPI 1710984646 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians

Taxonomy Code207RN0300X

License✔ Licensed in IL · 036066846

Definition

An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.

5201 WILLOW SPRINGS RD, La Grange Highlands, IL 60525

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Secondary Practice Location 1

Location 12340 S Highland Ave Ste 160Lombard, IL 60148-5395 · Phone (630) 495-9356 · Fax (630) 495-9357

Other Identifiers 4

OtherC30486IL · Rr Medicare Group

Other110095959IL · Rr Medicare Individual

Other1616108IL · Bcbs

Medicaid03666846IL

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Leonard Potempa Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2668380056

PECOS Enrollment IDI20091228000525

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Leonard Potempa reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Nani Elk Grove

4.0 mi

Nephrology

120 W 22ND ST
Oak Brook, IL 60523

Reassigned Medicare billing, Illinois enrollment
26 clinicians in this Medicare group

NPI 1154675528 (630) 573-5000

Nephrology Associates Of Northern Illinois, Ltd.

4.0 mi

Nephrology

120 W 22ND ST STE 200
Oak Brook, IL 60523

Reassigned Medicare billing, Illinois enrollment
161 clinicians in this Medicare group

NPI 1124069182 (630) 575-5000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 12

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

452 services219 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

378 services165 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

300 services157 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

162 services151 patients

Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month 99490

Chronic care management services involve a healthcare professional directing clinical staff in managing your chronic conditions. This includes the first 20 minutes per month of services like medication management, care coordination, and health monitoring to help improve your health and quality of life.

149 services21 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

119 services98 patients

Home dialysis services per month (20 years or older) 90966

Home dialysis services provide kidney treatment for patients aged 20 or older right in their own homes. This service includes necessary equipment, supplies, and support for performing dialysis. It's a convenient option that allows patients to maintain their daily routines while receiving essential care.

95 services41 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

31 services29 patients

Dialysis services, 2-3 physician visits per month (20 years or older) 90961

Dialysis is a treatment that performs the function of healthy kidneys if they're not working properly. It removes waste and excess fluid from your blood. 2-3 physician visits per month are recommended for monitoring your health and adjusting your treatment as needed. This service is available for those aged 20 years and older.

29 services20 patients

Dialysis services, 4 or more physician visits per month (20 years or older) 90960

Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.

23 services18 patients

Hemodialysis procedure with physician evaluation 90935

Hemodialysis is a treatment that uses a machine to filter waste and excess fluid from your blood when your kidneys can't. A physician checks your health before, during, and after the procedure to ensure it's working effectively for you.

18 services14 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

14 services14 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Adventist La Grange Memorial Hospital

Acute Care Hospitals · La Grange, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number140065

Location5101 S Willow Springs RdLa Grange, IL 60525 · Cook County

Emergency services

Adventist Hinsdale Hospital

Acute Care Hospitals · Hinsdale, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140122

Location120 North Oak StHinsdale, IL 60521 · Du Page County

Emergency services Birthing friendly

Northwestern Medicine Central Dupage Hospital

Acute Care Hospitals · Winfield, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140242

Location25 North Winfield RoadWinfield, IL 60190 · Du Page County

Emergency services Birthing friendly

Uchicago Medicine Adventhealth Bolingbrook

Acute Care Hospitals · Bolingbrook, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140304

Location500 Remington BoulevardBolingbrook, IL 60440 · Will County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60525 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$138.86 typical visit price

range $60.08 – $183.39

Typical copayment $34.71 (range $15.02 – $45.84)

Most-billed visit code 99204

Established Patient

$105.70 typical visit price

range $18.97 – $148.12

Typical copayment $26.42 (range $4.74 – $37.03)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Mycophenolic acid, oral, 180 mg J7518

Treatment-Treatment - Miscellaneous · category RX029N

1 supplier11 claims2,640 services$1.01 avg. paid by Medicare

Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511

Treatment-Chemotherapy · category RH012N

2 suppliers13 claims13 services$18.95 avg. paid by Medicare

Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512

Treatment-Chemotherapy · category RH012N

3 suppliers12 claims12 services$12.62 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ISABELLE VANMOON CHU MD

Surgery

5201 WILLOW SPRINGS RD
LA GRANGE HIGHLANDS, IL 60525

Cook County (630) 226-0664

SOHAIL QAMAR CSA

5201 WILLOW SPRINGS RD
LA GRANGE HIGHLANDS, IL 60525

Cook County (708) 579-0018

JAAFAR AFSHAR MD

Obstetrics & Gynecology

5201 WILLOW SPRINGS RD, 120
LA GRANGE HIGHLANDS, IL 60525

Cook County (708) 245-6097

BENJAMIN EYE CARE

Durable Medical Equipment & Medical Supplies

5201 WILLOW SPRINGS RD, SUITE 450
LA GRANGE HIGHLANDS, IL 60525

Cook County (708) 354-2008

BARBARA T BORGIONE PA-C

Physician Assistant

5201 WILLOW SPRINGS RD, SUITE 430
LA GRANGE HIGHLANDS, IL 60525

Cook County (708) 482-3213

DR. BRUCE DUANE FICK MD

Ophthalmology

5201 WILLOW SPRINGS RD, SUITE 450
LA GRANGE HIGHLANDS, IL 60525

Cook County (708) 354-2008

MRS. ALISON BAXTER GIUNTA M.S. PA-C

Physician Assistant (Surgical)

5201 WILLOW SPRINGS RD, #440
LA GRANGE HIGHLANDS, IL 60525

Cook County (708) 354-4667

ADVENTIST HEALTH PARTNERS, INC

Obstetrics & Gynecology

5201 WILLOW SPRINGS RD, SUITE 120
LA GRANGE HIGHLANDS, IL 60525

Cook County (708) 245-6097

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Leonard Potempa's NPI number?

The NPI number for Leonard Potempa is 1710984646. It was assigned to this individual provider in the NPPES registry on July 7, 2005.

Where is Leonard Potempa located?

Leonard Potempa practices at 5201 Willow Springs Rd Suite 260, La Grange Highlands, IL 60525. The listed phone number is (708) 354-1306.

What is Leonard Potempa's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Leonard Potempa enrolled in Medicare?

Yes. Leonard Potempa is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Leonard Potempa's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Leonard Potempa reassigns Medicare benefits to 2 organizations: Nani Elk Grove (Oak Brook, IL) and Nephrology Associates Of Northern Illinois, Ltd. (Oak Brook, IL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Leonard Potempa's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Leonard Potempa accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Leonard Potempa as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Leonard Potempa affiliated with any hospitals?

According to CMS data, Leonard Potempa is affiliated with Adventist La Grange Memorial Hospital, Adventist Hinsdale Hospital, Northwestern Medicine Central Dupage Hospital and Uchicago Medicine Adventhealth Bolingbrook.

When was this NPI record last updated?

The NPPES record for Leonard Potempa was last updated on April 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.