Leonard Potempa, MD
Leonard Potempa, MD is a Nephrology Physician in La Grange Highlands, IL, registered under NPI 1710984646.
Getting there
The practice address on file is 5201 WILLOW SPRINGS RD SUITE 260, La Grange Highlands, IL 60525. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 036066846 | IL | Nephrology Physician primary |
This provider holds licence 036066846 issued in IL. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Nephrology
- PAC ID
- 2668380056
- Enrollment ID
- I20091228000525
Medicare enrolment is recorded as approved under the provider type Practitioner - Nephrology. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Nephrology covers
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. NUCC Health Care Provider Taxonomy, code 207RN0300X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1710984646 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 7, 2005 |
| Last updated | Apr 29, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
5201 WILLOW SPRINGS RD SUITE 260 La Grange Highlands, IL 60525 (708) 354-1306 Fax (708) 354-1538 |
| Mailing address |
120 W 22ND ST STE 200 Oak Brook, IL 60523 |
| Other identifiers |
C30486
· Other (IL) 110095959 · Other (IL) 1616108 · Other (IL) 03666846 · Medicaid (IL) |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 7 | 1 | 0 | 9 | 8 | 4 | 6 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 7 | 2 | 0 | 9 | 8 | 8 | 6 | 8 |
Sum = 74 · next multiple of 10 = 80 · check digit = 6 · actual last digit = 6
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.