Internal Medicine in Elgin, Illinois
Data updated monthly · Last refresh September 2026
61 Internal Medicine providers practice in Elgin, and 41% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.
Internal Medicine providers in Elgin
Listed alphabetically. 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. Ramalingappa Mukunda, M.D.Elgin, IL · No drug or device payments recorded (2025) ·
(847) 695-3200 Dr. Ramana Kumar, MDElgin, IL · No drug or device payments recorded (2025) ·
(847) 742-4111 Dr. Richard Baley, M.D.Elgin, IL · No drug or device payments recorded (2025) ·
(847) 742-3525 Dr. Ronald Hirsch, M.D.Elgin, IL · No drug or device payments recorded (2025) ·
(847) 214-5780 Dr. Rosalina Guerrero-guzman, MDElgin, IL · $20 in drug and device payments (2025) · Telehealth ·
(847) 637-0500 Dr. Sergei Lipov, M.D.Elgin, IL · $531 in drug and device payments (2025) · Telehealth ·
(847) 608-7542 Dr. Srilatha Mulamalla, M.D.Elgin, IL · No drug or device payments recorded (2025) ·
(224) 783-2525 Dr. Trevor Roston, MDElgin, IL · No drug or device payments recorded (2025) ·
(224) 783-2525 Dr. Viswanatham Susarla, M.D. Dr. William Nelson, MDElgin, IL · No drug or device payments recorded (2025) ·
(847) 697-5144 Dr. Yazan MazahrehElgin, IL · No drug or device payments recorded (2025) · Telehealth ·
(224) 783-2525 Conditions Internal Medicine providers in Elgin, 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 Elgin, Illinois?There are 61 Internal Medicine providers with active NPI records practicing in Elgin, according to federal NPPES data refreshed monthly.
How many Internal Medicine providers in Elgin received drug or device company payments?25 of 61 (41%) 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 Elgin treat?Internal Medicine providers in Elgin 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 records 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.
All specialties in Elgin Internal Medicine across Illinois