Mark Nathan Belkin, M.D.
NPI 1023499498ActiveIndividual· Internal Medicine, Advanced Heart Failure and Transplant Cardiology· Chicago, IL
Internal Medicine, Advanced Heart Failure and Transplant Cardiology (M.D.) in Chicago, Illinois, trained at Rush Medical College of Rush University (class of 2015). Their prescriptions cost Medicare Part D more than their services did: $1,986,961 for 652 claims, against $73,108 paid for services in 2024. Bayer Healthcare Pharmaceuticals Inc. was the largest of 13 companies reporting payments in 2025, $9,537 in all, mostly consulting fees.
Overview
| NPI | 1023499498 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jun 11, 2015 |
| Last updated in NPPES | Jun 9, 2026 |
| Certified by provider | Jun 9, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Advanced Heart Failure and Transplant Cardiology Primary | 207RA0001X | 036145187 | 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 - Advanced Heart Failure and Transplant Cardiology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 342 |
|---|---|
| Services billed | 942 across 24 procedure codes |
| Paid by Medicare | $73,108 |
Part D prescriptions in 2024
| Prescriptions (claims) | 652 · 1,422 30-day fills |
|---|---|
| Patients | 122 |
| Total drug cost | $1,986,961 |
| Generic share | 57% of claims |
Education and affiliations
| Medical school | Rush Medical College of Rush University |
|---|---|
| Graduation year | 2015 |
| Medicare specialty | Advanced Heart Failure And Transplant Cardiology |
| Secondary specialties | Cardiovascular Disease (Cardiology) |
Medical groups
- University of ChicagoChicago, IL · 1,712 clinicians
- The University of Chicago Medical CenterChicago, IL · 915 clinicians
Hospital affiliations
- Community HospitalMunster, IN
- Ingalls Memorial HospitalHarvey, IL
- Methodist Hospitals IncGary, IN
- Northwestern Memorial HospitalChicago, IL
- The University of Chicago Medical CenterChicago, IL
Industry payments (Open Payments)
- 2025$9,537 · 26 payments from 13 companies
- 2024$1,408 · 19 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $7,229 | 6 |
| Aop Health US, LLC | $1,082 | 2 |
| Abbott Laboratories | $309.95 | 4 |
| Cvrx, Inc. | $271.47 | 2 |
| Endotronix, Inc. | $220.65 | 2 |
What the 2025 payments were for
- Consulting Fee$6,950 · 2 payments
- Food and Beverage$2,549 · 23 payments
- Travel and Lodging$38.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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