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. Tracy Cole, MDLoves Park, IL · No drug or device payments recorded (2025) ·
(815) 971-2000 Dr. David Greathouse, D.O.Macomb, IL · No drug or device payments recorded (2025) ·
(309) 836-3387 Dr. David Miller, D.O.Macomb, IL · No drug or device payments recorded (2025) ·
(309) 833-3536 Dr. David Reem, MDMacomb, IL · No drug or device payments recorded (2025) ·
(309) 837-9926 Dr. Gloria Cheng, MDMacomb, IL · No drug or device payments recorded (2025) ·
(309) 837-9926 Dr. Heather Harrison, M.D. Dr. Tuangui Cheng, MDMacomb, IL · No drug or device payments recorded (2025) ·
(309) 837-9926 Dr. Amber Wooldridge, MDMahomet, IL · $757 in drug and device payments (2025) ·
(217) 586-6600 Dr. Daniel Deem, M.D.Mahomet, IL · $782 in drug and device payments (2025) ·
(217) 586-6600 Dr. David Webb, MDMahomet, IL · No drug or device payments recorded (2025) ·
(217) 586-8400 Dr. Michael Kuhlenschmidt, M.D.Mahomet, IL · $438 in drug and device payments (2025) ·
(217) 366-5434 Dr. Madhu Malhotra, M.D.Manteno, IL · No drug or device payments recorded (2025) ·
(815) 468-1030 Dr. Maung Win, MDManteno, IL · No drug or device payments recorded (2025) ·
(815) 468-6581 Dr. Indu Vaidya, MDMarengo, IL · No drug or device payments recorded (2025) ·
(815) 568-7313 Dr. Jerry Cargill, MDMarengo, IL · No drug or device payments recorded (2025) ·
(815) 568-7313 Dr. Tanveer Ahmad, MDMarengo, IL · $239 in drug and device payments (2025) · Telehealth ·
(815) 568-1074 Dr. Byron Williamson, DOMarion, IL · No drug or device payments recorded (2025) ·
(618) 998-7000 Dr. Clinton Mohr, M.D.Marion, IL · No drug or device payments recorded (2025) ·
(618) 997-2396 Dr. Colleen Lawler-bjornberg, MD Dr. Earl Rudolph, D.O.Marion, IL · No drug or device payments recorded (2025) ·
(618) 998-7017 Dr. Herman Lyle, M.D.Marion, IL · No drug or device payments recorded (2025) ·
(618) 993-3692 Dr. James Lawler, M.D.Marion, IL · No drug or device payments recorded (2025) · Telehealth ·
(618) 518-7700 Dr. James Richards, MDMarion, IL · No drug or device payments recorded (2025) ·
(618) 998-5610 Dr. Joseph Herman, MDMarion, IL · No drug or device payments recorded (2025) ·
(618) 993-4102 Dr. Kirun Ahmad, D.O.Marion, IL · No drug or device payments recorded (2025) ·
(618) 246-2910 Dr. Liudmila Vasilets, MD Dr. Mannil Ravindranathan, MDMarion, IL · No drug or device payments recorded (2025) ·
(618) 997-2396 Dr. Michael Lawler, MDMarion, IL · $117 in drug and device payments (2025) · Telehealth ·
(618) 993-1111 Dr. Mohammed Rahimparast, MDMarion, IL · No drug or device payments recorded (2025) ·
(618) 993-8551 Dr. Ramesh GuthikondaMarion, IL · No drug or device payments recorded (2025) ·
(618) 998-7000 Dr. Silpa Maddala, M.DMarion, IL · No drug or device payments recorded (2025) ·
(618) 998-7000 Dr. Weiyi Tang, MDMarion, IL · No drug or device payments recorded (2025) ·
(618) 997-5311 Dr. Lloyd Flatt, M.D.Marseilles, IL · No drug or device payments recorded (2025) ·
(815) 795-2122 Dr. Debra Hoelscher, R.N.Maryville, IL · No drug or device payments recorded (2025) ·
(618) 288-5430 Dr. Eddie Paulk, D.O.Maryville, IL · $235 in drug and device payments (2025) ·
(618) 288-5566 Dr. James Simmering, MDMaryville, IL · No drug or device payments recorded (2025) ·
(618) 288-1122 Dr. Kevin Garner, M.D.Maryville, IL · $199 in drug and device payments (2025) ·
(618) 288-2120 Dr. Michael Mandis, MDMaryville, IL · $43 in drug and device payments (2025) ·
(618) 288-6136 Dr. Paul Malcharek, MDMaryville, IL · $924 in drug and device payments (2025) · Telehealth ·
(618) 344-3046 Dr. Rodney Greeling, DOMaryville, IL · No drug or device payments recorded (2025) ·
(618) 288-5566 Dr. Srikanth Nadella, M.D.Maryville, IL · $1,093 in drug and device payments (2025) ·
(618) 288-4350 Dr. Tibor Kopjas, M.D.Maryville, IL · $271 in drug and device payments (2025) ·
(618) 391-5061 Dr. Obinna OkorieMaryvillle, IL · No drug or device payments recorded (2025) ·
(618) 288-5711 Dr. Dorothy Jones, MDMatteson, IL · $842 in drug and device payments (2025) ·
(708) 679-2770 Dr. Leonard Robinson, M.D.Matteson, IL · $617 in drug and device payments (2025) ·
(708) 709-9375 Dr. Sherriff Alli-balogun, M.D.Matteson, IL · No drug or device payments recorded (2025) ·
(708) 747-8006 Dr. Abdur Shakir, MDMattoon, IL · $10,321 in drug and device payments (2025) · Telehealth ·
(217) 258-2250 Dr. Arnold Agapito, MDMattoon, IL · No drug or device payments recorded (2025) ·
(217) 258-2525 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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