Greg D. Denenberg, MD
NPI 1235185299ActiveIndividual· Internal Medicine· Glenview, IL
Internal Medicine (MD) with Select Rehabilitation, LLC and 1 other group, practicing in Glenview, Illinois. Their prescriptions cost Medicare Part D more than their services did: $1,028,760 for 12,132 claims, against $267,709 paid for services in 2024. Pfizer Inc. was the largest of 24 companies reporting payments in 2025, $3,028 in all, mostly food and beverage. Lists Northshore University Healthsystem - Evanston Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1235185299 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | May 25, 2006 |
| Last updated in NPPES | Jul 14, 2026 |
| Certified by provider | Jul 14, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036-098295 | 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 | 751 |
|---|---|
| Services billed | 4,287 across 66 procedure codes |
| Paid by Medicare | $267,709 |
Part D prescriptions in 2024
| Prescriptions (claims) | 12,132 · 26,866 30-day fills |
|---|---|
| Patients | 929 |
| Total drug cost | $1,028,760 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 1995 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Select Rehabilitation, LLCGlenview, IL · 2,046 clinicians
- Covenant Medical Group, LLCGlenview, IL · 8 clinicians
Hospital affiliations
- Northshore University Healthsystem - Evanston HospitalEvanston, IL
- Northwest Community Hospital 1Arlington Heights, IL
- Northwestern Lake Forest HospitalLake Forest, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Swedish HospitalChicago, IL
Other facilities
- Aspire Home Healthcare, LLCHome health agency · Morton Grove, IL
- Care in the Home Health ServicHome health agency · Wilmette, IL
- Centerwell Home Health IIHome health agency · Buffalo Grove, IL
- Family Home Health Services, IncHome health agency · Addison, IL
- Residential Home HealthHome health agency · Northbrook, IL
- Shirley Ryan AbilitylabInpatient rehabilitation facility · Chicago, IL
Industry payments (Open Payments)
- 2025$3,028 · 157 payments from 24 companies
- 2024$3,505 · 187 payments from 24 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $541.93 | 29 |
| Novo Nordisk Inc | $490.28 | 24 |
| Astrazeneca Pharmaceuticals LP | $340.31 | 22 |
| Abbvie Inc. | $272.04 | 19 |
| Lilly USA, LLC | $247.06 | 9 |
What the 2025 payments were for
- Food and Beverage$3,028 · 157 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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