Mark D. Diamond, D.O.
NPI 1265402804ActiveIndividual· Hospitalist· Joliet, IL
Hospitalist (D.O.) in Joliet, Illinois, trained at Chicago College of Osteopathy (class of 1993). 336 Medicare patients in 2024, $106,822 paid; nearly all of their 349 Part D prescriptions were generic (90%). Novartis Pharmaceuticals Corporation reported $190.69 in payments in 2024, mostly food and beverage.
Overview
| NPI | 1265402804 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Jan 25, 2006 |
| Last updated in NPPES | Aug 7, 2023 |
| Certified by provider | Aug 7, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Hospitalist Primary | 208M00000X | 036091440 | IL |
| Internal Medicine | 207R00000X | 036091440 | 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 - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 336 |
|---|---|
| Services billed | 1,096 across 12 procedure codes |
| Paid by Medicare | $106,822 |
Part D prescriptions in 2024
| Prescriptions (claims) | 349 · 384 30-day fills |
|---|---|
| Patients | 157 |
| Total drug cost | $11,898 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Chicago College of Osteopathy |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Internal Medicine |
Medical group
- Dupage Medical Group LtdWinfield, IL · 1,322 clinicians
Hospital affiliations
- Palos Community HospitalPalos Heights, IL
- Saint Joseph Medical CenterJoliet, IL
- Silver Cross Hospital and Medical CentersNew Lenox, IL
Other facilities
- Palos Community Hospital HospiceHospice · Lemont, IL
Industry payments (Open Payments)
- 2024$190.69 · 13 payments from 1 company
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $190.69 | 13 |
What the 2024 payments were for
- Food and Beverage$190.69 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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