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. Anothai Tavee, M.D.Du Quoin, IL · No drug or device payments recorded (2025) ·
(618) 542-8712 Dr. Chad Johnston, MDDu Quoin, IL · $42 in drug and device payments (2025) ·
(618) 542-2146 Dr. Louis Shicker, MDDwight, IL · No drug or device payments recorded (2025) ·
(815) 584-2806 Dr. Brian Ruiz, M.D.East Carondelet, IL · No drug or device payments recorded (2025) ·
(618) 286-4438 Dr. Alan Brongiel, M.D.East Dundee, IL · No drug or device payments recorded (2025) ·
(847) 428-3322 Dr. Faiza Ahmed, MDEast Dundee, IL · $73 in drug and device payments (2025) ·
(847) 426-0600 Dr. Gary Lewison, MDEast Dundee, IL · $300 in drug and device payments (2025) ·
(847) 428-3322 Dr. Jemini Ignacio, MDEast Dundee, IL · $239 in drug and device payments (2025) · Telehealth ·
(847) 428-3322 Dr. Srinivas Ravanam, M.D.East Dundee, IL · No drug or device payments recorded (2025) ·
(847) 428-2273 Dr. Steven Rehusch, M.D.East Dundee, IL · No drug or device payments recorded (2025) ·
(847) 428-3322 Dr. Todd Gephart, MDEast Dundee, IL · $118 in drug and device payments (2025) ·
(847) 428-3322 Dr. Thomas Mikkelson, MDEast Saint Louis, IL · No drug or device payments recorded (2025) ·
(618) 332-5212 Dr. Herman Ferrell, M.D.East St Louis, IL · No drug or device payments recorded (2025) ·
(618) 482-7242 Dr. Catherine Ash, M.D.Edwardsville, IL · $77 in drug and device payments (2025) · Telehealth ·
(618) 800-4500 Dr. David Yablonsky, D.O.Edwardsville, IL · $541 in drug and device payments (2025) ·
(618) 288-8850 Dr. Kelly Rourke, M.D.Edwardsville, IL · No drug or device payments recorded (2025) ·
(618) 219-7470 Dr. Nueki Naate, MDEdwardsville, IL · $2,924 in drug and device payments (2025) · Telehealth ·
(618) 692-5900 Dr. William Bonzelet, MDEdwardsville, IL · No drug or device payments recorded (2025) ·
(618) 659-2371 Dr. David Kowalski, M.D.Effingham, IL · No drug or device payments recorded (2025) ·
(217) 342-4151 Dr. Elene Awad, MD PHDEffingham, IL · No drug or device payments recorded (2025) ·
(217) 347-0458 Dr. Gregory Bismack, M.D.Effingham, IL · $20 in drug and device payments (2025) ·
(217) 342-2121 Dr. Jennifer Maneja, MDEffingham, IL · $144 in drug and device payments (2025) ·
(217) 342-4151 Dr. Lalaine Ramirez-hom, M.D.Effingham, IL · No drug or device payments recorded (2025) ·
(217) 347-7600 Dr. Louis Schwing Iv, MDEffingham, IL · $33 in drug and device payments (2025) ·
(217) 238-4634 Dr. Narinder Arora, M.D.Effingham, IL · $1,671 in drug and device payments (2025) ·
(217) 347-0768 Dr. Navdip Arora, M.D.Effingham, IL · $1,783 in drug and device payments (2025) ·
(217) 347-0768 Dr. Rita Maldonado, M.D.Effingham, IL · No drug or device payments recorded (2025) ·
(217) 347-7600 Dr. Thomas Heischmidt, M.D.Effingham, IL · $248 in drug and device payments (2025) ·
(217) 342-7000 Dr. Ahmed Tariq, DOEldorado, IL · $17 in drug and device payments (2025) ·
(618) 273-3361 Dr. Bruce Sobko, MDEldorado, IL · No drug or device payments recorded (2025) ·
(618) 273-3361 Dr. Adam Spain, D.O.Elgin, IL · No drug or device payments recorded (2025) ·
(847) 742-9800 Dr. Alan Wurzelbacher, M.D.Elgin, IL · $128 in drug and device payments (2025) · Telehealth ·
(847) 742-0792 Dr. Alejandro Ong, M.D.Elgin, IL · No drug or device payments recorded (2025) ·
(847) 742-1040 Dr. Anandita Gephart, M.D.Elgin, IL · No drug or device payments recorded (2025) · Telehealth ·
(847) 742-4111 Dr. Anthony Nidea, M.D.Elgin, IL · No drug or device payments recorded (2025) ·
(847) 742-1040 Dr. Archana Goel, MDElgin, IL · $218 in drug and device payments (2025) · Telehealth ·
(847) 214-5740 Dr. Ashima Salwan, MDElgin, IL · $1,204 in drug and device payments (2025) · Telehealth ·
(847) 742-2600 Dr. Brian O'byrneElgin, IL · No drug or device payments recorded (2025) ·
(224) 783-2525 Dr. Carmen Velazquez, MDElgin, IL · No drug or device payments recorded (2025) ·
(847) 931-0303 Dr. Carolyn Trelka-rojas, M.D.Elgin, IL · No drug or device payments recorded (2025) ·
(847) 742-1040 Dr. Danilo Aparicio Fernandez, M.D.Elgin, IL · No drug or device payments recorded (2025) ·
(312) 609-0300 Dr. Dennis Flynn, M.D.Elgin, IL · No drug or device payments recorded (2025) ·
(847) 742-0792 Dr. Desiree Oliveros, MDElgin, IL · No drug or device payments recorded (2025) ·
(847) 622-2086 Dr. Douglas Chang, M.D.Elgin, IL · No drug or device payments recorded (2025) ·
(847) 742-1040 Dr. Elio Vento, M.D.Elgin, IL · $273 in drug and device payments (2025) · Telehealth ·
(847) 695-8100 Dr. Eunice Jacob-charly, DOElgin, IL · No drug or device payments recorded (2025) ·
(224) 212-0205 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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