Natalie M. Selk, MD
NPI 1881851400ActiveIndividual· Internal Medicine, Nephrology· Evergreen Park, IL
Internal Medicine, Nephrology (MD) in Evergreen Park, Illinois, trained at Rush Medical College of Rush University (class of 2007). 575 Medicare patients in 2024, $229,575 paid; nearly all of their 1,178 Part D prescriptions were generic (90%). Fresenius USA Marketing, Inc. was the largest of 3 companies reporting payments in 2025, $68.15 in all, mostly food and beverage.
Overview
| NPI | 1881851400 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 21, 2008 |
| Last updated in NPPES | Feb 3, 2023 |
| Certified by provider | Feb 3, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 036124950 | IL |
| Internal Medicine | 207R00000X | 036124950 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nephrology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 575 |
|---|---|
| Services billed | 2,523 across 26 procedure codes |
| Paid by Medicare | $229,575 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,178 · 2,973 30-day fills |
|---|---|
| Patients | 242 |
| Total drug cost | $102,855 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Rush Medical College of Rush University |
|---|---|
| Graduation year | 2007 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Advocate Health and Hospitals CorporationChicago, IL · 3,118 clinicians
- Nephrology Associates of Northern Illinois LtdAlgonquin, IL · 117 clinicians
- Southwest Nephrology Associates, S.C.Orland Park, IL · 13 clinicians
Hospital affiliations
- Advocate Christ Hospital & Medical CenterOak Lawn, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Osf Little Company of Mary Medical CenterEvergreen Park, IL
- Palos Community HospitalPalos Heights, IL
- Silver Cross Hospital and Medical CentersNew Lenox, IL
Other facilities
- Usrc Hickory Hills DialysisDialysis facility · Hickory Hills, IL
- Usrc Scottsdale DialysisDialysis facility · Chicago, IL
Industry payments (Open Payments)
- 2025$68.15 · 3 payments from 3 companies
- 2024$85.11 · 4 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Fresenius USA Marketing, Inc. | $24.90 | 1 |
| Ardelyx, Inc. | $24.40 | 1 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $18.85 | 1 |
What the 2025 payments were for
- Food and Beverage$49.30 · 2 payments
- Education$18.85 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 20 nephrologists in Evergreen Park · All nephrologists in Illinois