Hematologists (Internal Medicine) in Illinois
Data updated monthly · Last refresh October 2026
48 Hematology (Internal Medicine) providers practice in Illinois, including 16 (33%) 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.
48providers
16telehealth
Chicagotop city
Hematology (Internal Medicine) by city in Illinois
Choose a city to see providers there.
Where Hematologists (Internal Medicine) in Illinois practice
From CMS Medicare enrollment records covering 28 of the 48 providers listed here (58%). Providers who do not bill Medicare are not included in these figures.
7%solo or small practice (under 10 clinicians)
4%mid-size group (10 to 99)
89%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Hematologists (Internal Medicine) | All clinicians in group | Main city |
| Rush University Medical Group | 7 | 1,521 | Chicago |
| The Board of Trustees of the University of Illinois | 5 | 1,134 | Chicago |
| Northwestern Medical Faculty Foundation | 4 | 4,386 | Chicago |
| Endeavor Health Medical Group | 4 | 3,330 | Evanston |
| Advocate Health and Hospitals Corp.oration | 3 | 3,081 | Chicago |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Hematologists (Internal Medicine) affiliated |
| Rush University Medical Center | Chicago | Nonprofit | 5 of 5 | 7 |
| University of Illinois Hospital and Clinics | Chicago | Government | 4 of 5 | 5 |
| Rush Oak Park Hospital | Oak Park | Nonprofit | 4 of 5 | 5 |
| Northwestern Lake Forest Hospital | Lake Forest | Nonprofit | 5 of 5 | 4 |
| Northwestern Medicine Central Dupage Hospital | Winfield | Nonprofit | 5 of 5 | 4 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
Hematology (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. Deepak Malhotra, M.D.Carterville, IL · $24 in drug and device payments (2025) ·
(618) 985-3333 Dr. Anaadriana Zakarija, MDChicago, IL · No drug or device payments recorded (2025) · Telehealth ·
(312) 695-0990 Dr. Anjana Chandran, MDChicago, IL · No drug or device payments recorded (2025) · Telehealth ·
(312) 842-7117 Dr. Brady Stein, MDChicago, IL · No drug or device payments recorded (2025) · Telehealth ·
(312) 695-6832 Dr. Celalettin Ustun, MDChicago, IL · $12,411 in drug and device payments (2025) ·
(312) 942-5904 Dr. David Green, MDChicago, IL · No drug or device payments recorded (2025) ·
(312) 695-0990 Dr. Deborah Katz, MDChicago, IL · $95 in drug and device payments (2025) · Telehealth ·
(312) 942-5000 Dr. Elisa Zucchetti, MDChicago, IL · No drug or device payments recorded (2025) ·
(312) 355-1625 Dr. Emma RabinovichChicago, IL · $187 in drug and device payments (2025) ·
(866) 600-2273 Dr. Gautam Borthakur, M.D.Chicago, IL · $152 in drug and device payments (2025) · Telehealth ·
(312) 942-5904 Dr. Hau Kwaan, MDChicago, IL · No drug or device payments recorded (2025) ·
(312) 695-0990 Dr. Hosam Khayal, MDChicago, IL · $137 in drug and device payments (2025) ·
(312) 492-2706 Dr. Irene Dehghan-paz, MDChicago, IL · No drug or device payments recorded (2025) ·
(312) 942-5352 Dr. Istvan Redei, M.D.Chicago, IL · No drug or device payments recorded (2025) ·
(847) 746-4358 Dr. Jagoda Jasielec, M.D.Chicago, IL · No drug or device payments recorded (2025) ·
(773) 702-1000 Dr. Jayesh Mehta, MDChicago, IL · $1,013 in drug and device payments (2025) · Telehealth ·
(312) 695-0990 Dr. John QuigleyChicago, IL · $27,197 in drug and device payments (2025) ·
(866) 600-2273 Dr. Kathleen Phelan, M.D.Chicago, IL · No drug or device payments recorded (2025) ·
(312) 942-5904 Dr. Kunal Desai, MD MBA MSChicago, IL · No drug or device payments recorded (2025) ·
(312) 560-3380 Dr. Martin Tallman, MDChicago, IL · No drug or device payments recorded (2025) ·
(312) 695-0990 Dr. Maryam ZiaChicago, IL · $1,582 in drug and device payments (2025) ·
(312) 864-7250 Dr. Matias Sanchez, MDChicago, IL · $2,633 in drug and device payments (2025) · Telehealth ·
(773) 490-0695 Dr. Melissa Larson, M.D.Chicago, IL · $134 in drug and device payments (2025) ·
(312) 563-2320 Dr. Nadia Khan, MDChicago, IL · $5,562 in drug and device payments (2025) · Telehealth ·
(800) 226-2371 Dr. Olga Frankfurt, MDChicago, IL · No drug or device payments recorded (2025) ·
(312) 695-0990 Dr. Parameswaren Venugopal, M.D.Chicago, IL · $3,056 in drug and device payments (2025) · Telehealth ·
(312) 942-5904 Dr. Rebecca Steuer, MDChicago, IL · No drug or device payments recorded (2025) ·
(312) 942-5904 Dr. Robert Stein, MDChicago, IL · No drug or device payments recorded (2025) ·
(708) 424-9710 Dr. Seema Singhal, MDChicago, IL · No drug or device payments recorded (2025) · Telehealth ·
(312) 695-0990 Dr. Sefer Gezer, M.D.Chicago, IL · No drug or device payments recorded (2025) ·
(312) 942-5904 Dr. Seo-hyun Kim, M.D.Chicago, IL · $2,345 in drug and device payments (2025) · Telehealth ·
(312) 563-2875 Dr. Stephanie Gregory, M.D. Dr. Radwan Diab, M.D.Decatur, IL · $538 in drug and device payments (2025) ·
(217) 876-6600 Dr. James Jordan, M.D.Downers Grove, IL · No drug or device payments recorded (2025) ·
(630) 515-1073 Dr. David Grinblatt, MDEvanston, IL · No drug or device payments recorded (2025) · Telehealth ·
(847) 570-2112 Dr. Jason Kaplan, MDEvanston, IL · $23 in drug and device payments (2025) ·
(847) 570-2183 Dr. Jennifer Obel, MDEvanston, IL · No drug or device payments recorded (2025) ·
(847) 570-2110 Dr. Lynne Kaminer, MDEvanston, IL · No drug or device payments recorded (2025) · Telehealth ·
(847) 570-2112 Dr. Alla Gimelfarb, MDGlenview, IL · No drug or device payments recorded (2025) · Telehealth ·
(847) 503-1000 Dr. Michael Ellison, MDGlenview, IL · No drug or device payments recorded (2025) ·
(847) 832-6500 Dr. Angela Ai, MDMaywood, IL · $379 in drug and device payments (2025) ·
(708) 216-9000 Dr. Estefania Gauto-mariotti, MDMaywood, IL · No drug or device payments recorded (2025) ·
(224) 714-8150 Dr. Stephanie Tsai, M.D.Maywood, IL · $42,151 in drug and device payments (2025) · Telehealth ·
(708) 216-9000 Dr. Jaya Kasturi, M.D.Melrose Park, IL · No drug or device payments recorded (2025) ·
(708) 681-4040 Dr. Ari SeifterOrland Park, IL · $170 in drug and device payments (2025) · Telehealth ·
(708) 873-4500 Dr. Yogesh Jethava, MDPark Ridge, IL · $63,785 in drug and device payments (2025) ·
(847) 723-4400 Dr. Neil Dunavin, M.D.Zion, IL · No drug or device payments recorded (2025) ·
(888) 828-4888 Common questions
How many Hematology (Internal Medicine) providers are in Illinois?There are 48 Hematology (Internal Medicine) providers with active NPI records practicing in Illinois, according to federal NPPES data refreshed monthly.
Do Hematology (Internal Medicine) providers in Illinois offer telehealth?Yes. 16 of the 48 Hematology (Internal Medicine) providers in Illinois (about 33%) report offering telehealth services in CMS data.
Which cities in Illinois have the most Hematology (Internal Medicine) providers?Chicago (32), Evanston (4), Maywood (3) have the highest concentration of Hematology (Internal Medicine) providers in Illinois.
How many Hematology (Internal Medicine) providers in Illinois received drug or device company payments?22 of 48 Hematology (Internal Medicine) providers in Illinois (46%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
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 Hematologists (Internal Medicine) in Illinois work in independent practices or large health systems?Among 28 Hematologists (Internal Medicine) in Illinois enrolled in Medicare, 7% bill through a solo or small practice with fewer than 10 clinicians, 4% through a mid-size group of 10 to 99, and 89% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Hematologists (Internal Medicine) in Illinois work at?According to CMS facility affiliation records, the Illinois hospitals where the most Hematologists (Internal Medicine) hold privileges are Rush University Medical Center in Chicago; University of Illinois Hospital and Clinics in Chicago; Rush Oak Park Hospital in Oak Park.
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