Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Internal Medicine

Greg D. Denenberg, MD

Works at hospitals in Evanston, IL · Arlington Heights, IL · Lake Forest, IL … · Illinois

Summary

Greg D. Denenberg, MD (Internal Medicine) is listed by Medicare at 5 hospitals in Evanston, IL, Arlington Heights, IL and Lake Forest, IL and other places. NPI 1235185299. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Greg D. Denenberg, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

Internal MedicinePrimary specialty
YesAccepts Medicare assignment
YesOffers telehealth
31Years since medical school (graduated 1995)
MaleGender (as listed)
Select Rehabilitation, LLCGroup practice (+1 more)

Quick answers

Which hospitals does Greg D. Denenberg work at?
Medicare's official clinician data lists Greg D. Denenberg at 5 hospitals: Northshore University Healthsystem - Evanston Hospital, Northwest Community Hospital 1, Northwestern Lake Forest Hospital, Northwestern Medicine Central Dupage Hospital and Swedish Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Greg D. Denenberg see patients?
Medicare's clinician data lists 3 practice locations, including Glenview, IL and Skokie, IL. Call before your visit to confirm the address.
What is Greg D. Denenberg's specialty?
Medicare lists Internal Medicine as the primary specialty.
Does Greg D. Denenberg accept Medicare assignment?
Yes. Medicare's clinician data says Greg D. Denenberg accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
Does Greg D. Denenberg offer telehealth?
Medicare's clinician data says Greg D. Denenberg offers telehealth services. Ask the office which visits can be done by video or phone.
What is the phone number for Greg D. Denenberg?
(847) 901-5200, as listed in official Medicare / NPI Registry data.
What is Greg D. Denenberg's NPI number?
1235185299. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Greg D. Denenberg works

Medicare's Facility Affiliation Data lists Greg D. Denenberg at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Greg D. Denenberg is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Greg D. Denenberg as a member of these groups (CMS data updated 2026-10-02).

  • Select Rehabilitation, LLC2,046 clinicians in the group
  • Covenant Medical Group, LLC8 clinicians in the group

Specialties

Find other Internal Medicine doctors in Illinois →

Other internal medicine doctors in Glenview

Clinicians with the same Medicare primary specialty in Glenview, IL — not a recommendation.

All internal medicine doctors in Glenview →

Clinician information

CredentialMD
Graduation year1995
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1235185299
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians