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. Pareshkumar Jani, M.D.Glenview, IL · No drug or device payments recorded (2025) ·
(773) 443-4534 Dr. Reuben Cohen, MDGlenview, IL · No drug or device payments recorded (2025) ·
(847) 724-0938 Dr. Rimma Polotskaya, MDGlenview, IL · No drug or device payments recorded (2025) ·
(847) 657-7963 Dr. Roger Hecker, MDGlenview, IL · No drug or device payments recorded (2025) · Telehealth ·
(847) 582-2134 Dr. Sandra Rodriguez, MDGlenview, IL · No drug or device payments recorded (2025) ·
(847) 470-0780 Dr. Sheil Shukla, DOGlenview, IL · No drug or device payments recorded (2025) · Telehealth ·
(847) 535-7157 Dr. Sheree Lipkis, MDGlenview, IL · $1,186 in drug and device payments (2025) ·
(847) 729-0400 Dr. Susan Kim, DOGlenview, IL · $447 in drug and device payments (2025) · Telehealth ·
(224) 255-5408 Dr. Susan Piazza, MDGlenview, IL · No drug or device payments recorded (2025) ·
(847) 657-1700 Dr. Theresa Kuppy, MDGlenview, IL · No drug or device payments recorded (2025) ·
(847) 998-4100 Dr. Thomas Ficho, M.D., PH.D.Glenview, IL · $1,433 in drug and device payments (2025) · Telehealth ·
(847) 998-0010 Dr. Thomas Sultan, MDGlenview, IL · $25 in drug and device payments (2025) ·
(847) 729-2320 Dr. Thomas Vescio, M.D.Glenview, IL · No drug or device payments recorded (2025) ·
(847) 467-7423 Dr. Undine Vallejos, DOGlenview, IL · No drug or device payments recorded (2025) ·
(847) 657-5800 Dr. Videsha Kulkarni, MDGlenview, IL · $1,067 in drug and device payments (2025) · Telehealth ·
(847) 998-0010 Dr. Wieslaw Wojnarski, M.D.Glenview, IL · No drug or device payments recorded (2025) ·
(847) 559-0596 Dr. Michael Radzienda, M.D.Glenwood, IL · No drug or device payments recorded (2025) ·
(708) 300-3132 Dr. Daphne Gonzalez Aponte, MDGodfrey, IL · No drug or device payments recorded (2025) ·
(618) 467-1520 Dr. Jowe Hsieh, MDGranite City, IL · No drug or device payments recorded (2025) ·
(618) 452-3301 Dr. Kanubhai Patel, M.D.Granite City, IL · No drug or device payments recorded (2025) ·
(618) 877-3066 Dr. Lawrence Harmon, MDGranite City, IL · $145 in drug and device payments (2025) ·
(618) 451-1500 Dr. Leyland Thomas, MDGranite City, IL · $92 in drug and device payments (2025) ·
(618) 452-3301 Dr. Michael Adams, MDGranite City, IL · $1,384 in drug and device payments (2025) ·
(618) 452-3301 Dr. Oladele Ajao, MDGranite City, IL · $124 in drug and device payments (2025) ·
(618) 452-3301 Dr. Prasanna Kumar, M.D.Granite City, IL · No drug or device payments recorded (2025) ·
(618) 877-3066 Dr. Rajinder Mahay, MDGranite City, IL · $1,010 in drug and device payments (2025) ·
(618) 451-1500 Dr. Riyadh Salih, MDGranite City, IL · No drug or device payments recorded (2025) ·
(618) 798-3000 Dr. Rod Hartzel, MDGranite City, IL · No drug or device payments recorded (2025) ·
(618) 451-1500 Dr. Timothy HipskindGranite City, IL · No drug or device payments recorded (2025) ·
(618) 798-3000 Dr. Agata Oczko-danguilan, M.D.Grayslake, IL · $322 in drug and device payments (2025) · Telehealth ·
(847) 546-5600 Dr. Dilraj Sidhu, M.D.Grayslake, IL · No drug or device payments recorded (2025) ·
(847) 935-4326 Dr. Howard Axe, MDGrayslake, IL · No drug or device payments recorded (2025) · Telehealth ·
(847) 535-6150 Dr. Lawrence Amato, M.D.Grayslake, IL · $1,773 in drug and device payments (2025) ·
(847) 566-0300 Dr. Parag Thakkar, MDGrayslake, IL · No drug or device payments recorded (2025) ·
(847) 548-9186 Dr. Robert Gerber, MDGrayslake, IL · No drug or device payments recorded (2025) ·
(847) 535-7157 Dr. Vincent Doan, DOGrayslake, IL · $103 in drug and device payments (2025) ·
(847) 535-7157 Dr. Ketan Vyas, MDGrayville, IL · $26 in drug and device payments (2025) ·
(618) 375-7101 Dr. Jennifer Ota, MDGreat Lakes, IL · No drug or device payments recorded (2025) ·
(847) 688-4560 Dr. Min Kim, M.D.Great Lakes, IL · No drug or device payments recorded (2025) ·
(847) 688-3444 Dr. Norman Lee, M.D.Great Lakes, IL · No drug or device payments recorded (2025) ·
(847) 688-5528 Dr. Ann Hagedorn, MDGreenville, IL · No drug or device payments recorded (2025) ·
(618) 664-1230 Dr. Michael Harris, MDGreenville, IL · No drug or device payments recorded (2025) ·
(618) 664-1230 Dr. Chae Han - Chang, MDGurnee, IL · No drug or device payments recorded (2025) · Telehealth ·
(847) 566-3337 Dr. Claudia Tiwet, MDGurnee, IL · No drug or device payments recorded (2025) ·
(847) 566-3337 Dr. Edward Badal, M.D.Gurnee, IL · $30 in drug and device payments (2025) · Telehealth ·
(847) 566-3337 Dr. Efren Estrella, M.D.Gurnee, IL · No drug or device payments recorded (2025) ·
(847) 535-7900 Dr. Gerald Frank, MDGurnee, IL · No drug or device payments recorded (2025) ·
(847) 623-8818 Dr. Guadalupe Sitjar, MDGurnee, IL · No drug or device payments recorded (2025) ·
(847) 336-9159 Dr. James Monahan, MDGurnee, IL · No drug or device payments recorded (2025) ·
(847) 623-3200 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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