Internal Medicine Doctors in Illinois
Data updated monthly · Last refresh October 2026
7,189 Internal Medicine providers practice in Illinois, including 1,260 (18%) offering telehealth. The largest concentration is in Chicago. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.
7,189providers
1,260telehealth
Chicagotop city
Internal Medicine by city in Illinois
Choose a city to see providers there.
Internal Medicine providers in Illinois
Listed by city, largest first. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.
Dr. Amar Peruri, MDLake Forest, IL · No drug or device payments recorded (2025) ·
(847) 688-1900 Dr. Barry Levin, M.D.Lake Forest, IL · No drug or device payments recorded (2025) ·
(224) 516-4108 Dr. Corrina Smith, MDLake Forest, IL · No drug or device payments recorded (2025) ·
(847) 234-5600 Dr. Cristina Anez De Gomez, MDLake Forest, IL · No drug or device payments recorded (2025) · Telehealth ·
(847) 535-7157 Dr. David Vigder, MDLake Forest, IL · $15 in drug and device payments (2025) ·
(847) 615-2227 Dr. Elisabeth Cormier, MDLake Forest, IL · $159 in drug and device payments (2025) ·
(847) 998-0862 Dr. Gary Schaffel, M.D.Lake Forest, IL · $313 in drug and device payments (2025) ·
(847) 234-8100 Dr. Han Chung NgLake Forest, IL · No drug or device payments recorded (2025) ·
(847) 234-6063 Dr. Jason Garti, M.D.Lake Forest, IL · $50 in drug and device payments (2025) ·
(847) 234-8866 Dr. Jennifer Dimond, MDLake Forest, IL · No drug or device payments recorded (2025) ·
(847) 234-8866 Dr. Kurt Brotherson, MDLake Forest, IL · No drug or device payments recorded (2025) ·
(847) 482-0136 Dr. Marissa Versalle, DOLake Forest, IL · $24 in drug and device payments (2025) ·
(847) 861-0025 Dr. Mark Rudberg, MD MPHLake Forest, IL · No drug or device payments recorded (2025) ·
(847) 234-6363 Dr. Michael Kolozsvary-kiss, M.D.Lake Forest, IL · No drug or device payments recorded (2025) ·
(561) 768-3044 Dr. Michael Sommerfeld, MDLake Forest, IL · $50 in drug and device payments (2025) · Telehealth ·
(224) 516-4108 Dr. Mohammed Siddique, M.D.Lake Forest, IL · No drug or device payments recorded (2025) ·
(847) 234-2197 Dr. Richard Siebert, M.D.Lake Forest, IL · No drug or device payments recorded (2025) ·
(847) 234-8808 Dr. Roopal Thakkar, M.D.Lake Forest, IL · No drug or device payments recorded (2025) ·
(847) 505-6150 Dr. Sam Hull, MDLake Forest, IL · No drug or device payments recorded (2025) ·
(847) 295-5729 Dr. Scott Braunlich, M.D.Lake Forest, IL · No drug or device payments recorded (2025) ·
(847) 234-8866 Dr. Sean Connolly, M.D.Lake Forest, IL · $102 in drug and device payments (2025) ·
(847) 234-5600 Dr. Seema Bhatia, M.D.Lake Forest, IL · No drug or device payments recorded (2025) ·
(847) 910-0298 Dr. Steven Lasin, MDLake Forest, IL · $336 in drug and device payments (2025) ·
(847) 234-8100 Dr. Vivian SalazarLake Forest, IL · No drug or device payments recorded (2025) · Telehealth ·
(847) 234-8866 Dr. William Seiden, MDLake Forest, IL · No drug or device payments recorded (2025) · Telehealth ·
(608) 242-6850 Dr. Bonnie Bremer, M.D.Lake In The Hills, IL · $181 in drug and device payments (2025) ·
(224) 569-4000 Dr. George Urban, M.D.Lake In The Hills, IL · $104 in drug and device payments (2025) · Telehealth ·
(224) 569-4000 Dr. James Nikoleit, MDLake In The Hills, IL · $57 in drug and device payments (2025) · Telehealth ·
(224) 569-4000 Dr. Kevin Cronin, M.D.Lake In The Hills, IL · $70 in drug and device payments (2025) · Telehealth ·
(224) 569-4000 Dr. Steven Campau, MDLake In The Hills, IL · $2,026 in drug and device payments (2025) · Telehealth ·
(224) 569-4000 Dr. Ty Stein, M.D.Lake In The Hills, IL · $58 in drug and device payments (2025) · Telehealth ·
(224) 569-4000 Dr. Mohamed Nasr, M.D.Lake Villa, IL · No drug or device payments recorded (2025) ·
(847) 356-9009 Dr. Barry Berger, D.O.Lake Zurich, IL · No drug or device payments recorded (2025) ·
(847) 438-2454 Dr. Lisa Gulcher, M.D.Lake Zurich, IL · $87 in drug and device payments (2025) ·
(847) 719-2200 Dr. Rajeev Kapoor, M.D., M.P.HLake Zurich, IL · No drug or device payments recorded (2025) ·
(847) 847-1393 Dr. Sivakami Thayu, MDLake Zurich, IL · $19 in drug and device payments (2025) · Telehealth ·
(847) 438-2144 Dr. Nanette Fabi, M.D.Lansing, IL · No drug or device payments recorded (2025) ·
(708) 474-8844 Dr. Shiping Bao, M.D.Lansing, IL · No drug or device payments recorded (2025) ·
(708) 765-9790 Dr. Ilah Heller-bair, MDLemont, IL · No drug or device payments recorded (2025) ·
(630) 257-5400 Dr. Jacek Grela, M.D.Lemont, IL · $2,148 in drug and device payments (2025) ·
(630) 754-0141 Dr. Jeffrey Sam, DOLemont, IL · No drug or device payments recorded (2025) ·
(630) 414-9335 Dr. Teresa Olivares, M.D.Lemont, IL · No drug or device payments recorded (2025) ·
(630) 857-3545 Dr. Adam Rubinstein, MDLibertyville, IL · $3,113 in drug and device payments (2025) · Telehealth ·
(847) 247-0300 Dr. Allison Klotzbuecher, D.O.Libertyville, IL · No drug or device payments recorded (2025) ·
(847) 362-1393 Dr. Andres Mafla Grisales, MDLibertyville, IL · No drug or device payments recorded (2025) ·
(847) 566-5200 Dr. Armenak Asatryan, M.D.Libertyville, IL · No drug or device payments recorded (2025) ·
(847) 236-0323 Dr. David Recker, M.D.Libertyville, IL · $426,201 in drug and device payments (2025) ·
(847) 680-1105 Dr. Elliot Miller, MDLibertyville, IL · $1,321 in drug and device payments (2025) · Telehealth ·
(847) 816-3084 Conditions Internal Medicine providers in Illinois commonly treat
Patients often search by condition rather than specialty. These are conditions typically managed by Internal Medicine providers. Individual practices vary, so confirm with the provider before booking.
- High blood pressure
- Type 2 diabetes
- High cholesterol
- Preventive care
- Chronic disease management
Common questions
How many Internal Medicine providers are in Illinois?There are 7,189 Internal Medicine providers with active NPI records practicing in Illinois, according to federal NPPES data refreshed monthly.
Do Internal Medicine providers in Illinois offer telehealth?Yes. 1,260 of the 7,189 Internal Medicine providers in Illinois (about 18%) report offering telehealth services in CMS data.
Which cities in Illinois have the most Internal Medicine providers?Chicago (2,841), Maywood (252), Springfield (196) have the highest concentration of Internal Medicine providers in Illinois.
How many Internal Medicine providers in Illinois received drug or device company payments?2,137 of 7,189 Internal Medicine providers in Illinois (30%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
What conditions do Internal Medicine providers in Illinois treat?Internal Medicine providers commonly treat high blood pressure, type 2 diabetes, high cholesterol, preventive care, chronic disease management and related conditions. Individual practices vary, so confirm with the provider before booking.
Where does this data come from?Provider counts and profiles come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.
Do most Internal Medicine Doctors in Illinois work in independent practices or large health systems?Among 3,097 Internal Medicine Doctors in Illinois enrolled in Medicare, 22% bill through a solo or small practice with fewer than 10 clinicians, 10% through a mid-size group of 10 to 99, and 68% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Internal Medicine Doctors in Illinois work at?According to CMS facility affiliation records, the Illinois hospitals where the most Internal Medicine Doctors hold privileges are Northwestern Medicine Central Dupage Hospital in Winfield; Northshore University Healthsystem - Evanston Hospital in Evanston; Northwestern Memorial Hospital in Chicago.
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