Maria S. Khan, M.D.
NPI 1548476773ActiveIndividual· Internal Medicine, Nephrology· Libertyville, IL
Internal Medicine, Nephrology (M.D.) with Associates in Nephrology SC, practicing in Libertyville, Illinois. In 2024 Medicare paid $217,025 for 726 patients, and Part D covered 1,195 of their prescriptions, 85% of them generic. Calliditas Therapeutics US Inc. was the largest of 18 companies reporting payments in 2025, $1,063 in all, mostly food and beverage. Lists Advocate Condell Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1548476773 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 15, 2007 |
| Last updated in NPPES | Nov 22, 2024 |
| Certified by provider | Nov 22, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 036121625 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 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 | 726 |
|---|---|
| Services billed | 3,101 across 24 procedure codes |
| Paid by Medicare | $217,025 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,195 · 2,779 30-day fills |
|---|---|
| Patients | 238 |
| Total drug cost | $185,509 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 2002 |
|---|---|
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- Associates in Nephrology SCChicago, IL · 52 clinicians
Hospital affiliations
- Advocate Condell Medical CenterLibertyville, IL
- Advocate Illinois Masonic Medical CenterChicago, IL
- Northwestern Lake Forest HospitalLake Forest, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Vista Medical Center EastWaukegan, IL
Other facilities
- Concerto DialysisDialysis facility · Lincolnwood, IL
- Davita Beach Park DialysisDialysis facility · Waukegan, IL
- Davita Lake County Dialysis ServicesDialysis facility · Vernon Hills, IL
- Davita Waukegan Renal CenterDialysis facility · Waukegan, IL
- Fkc - GrayslakeDialysis facility · Grayslake, IL
- Encompass Health Rehab Institute of LibertyvilleInpatient rehabilitation facility · Libertyville, IL
Industry payments (Open Payments)
- 2025$1,063 · 37 payments from 18 companies
- 2024$1,080 · 39 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Calliditas Therapeutics US Inc. | $245.20 | 6 |
| Otsuka America Pharmaceutical, Inc. | $155.79 | 3 |
| Astrazeneca Pharmaceuticals LP | $82.49 | 3 |
| Ani Pharmaceuticals, Inc. | $79.68 | 3 |
| Mallinckrodt Hospital Products Inc. | $74.71 | 3 |
What the 2025 payments were for
- Food and Beverage$1,039 · 36 payments
- Education$24.67 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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