Medicare · fee-for-service Part B

Illinois — total Medicare claims by state

62.6M

Services billed

$2.1B

Medicare payments

4,017

Physician groups

4.3%

of the national total

299K

Inpatient discharges · FY2024

60.0M

Part D claims · CY2024

Physician groups in Illinois billed 62,631,618 Medicare Part B services in 2024, totaling $2.1B in Medicare payments — 4.3% of the national total.

Calendar year 2024 · Medicare fee-for-service Part B

Illinois billing by specialty

Physician groups billing in Illinois, by primary specialty · CY2024

Primary specialty	Services	Medicare payments	Groups
Internal Medicine	14.9M	$562.6M	414
Hematology/Oncology	9.1M	$113.9M	19
Physical Therapist in Private Practice	6.7M	$131.2M	378
Diagnostic Radiology	4.4M	$148.3M	203
Orthopedic Surgery	3.7M	$71.5M	64
Family Practice	3.7M	$145.6M	424
Hospitalist	3.2M	$169.7M	33
Ophthalmology	2.4M	$154.7M	113
Infectious Disease	1.9M	$30.4M	15
Dermatology	1.5M	$84.5M	97
Rheumatology	1.1M	$10.8M	6
Urology	1.0M	$38.2M	17
Optometry	927K	$28.4M	262
Podiatry	737K	$32.1M	117
Emergency Medicine	648K	$42.6M	243
Cardiovascular Disease (Cardiology)	638K	$41.3M	71
Neurology	513K	$17.5M	29
Pathology	511K	$14.2M	59
Nephrology	444K	$32.9M	31
Physical Medicine and Rehabilitation	431K	$27.9M	29
Anesthesiology	425K	$17.2M	209
Chiropractic	390K	$9.0M	273
Obstetrics/Gynecology	308K	$11.2M	64
Nurse Practitioner	297K	$37.6M	79
Gastroenterology	279K	$17.0M	29
Clinical Social Worker	276K	$16.8M	180
Interventional Cardiology	224K	$9.1M	11
Psychiatry	222K	$13.6M	86
Pain Management	217K	$3.9M	13
Pulmonary Disease	189K	$11.7M	14
Otolaryngology	183K	$13.0M	21
Occupational Therapist in Private Practice	177K	$3.5M	35
Allergy/Immunology	163K	$3.0M	20
General Surgery	113K	$25.8M	37
Interventional Pain Management	86,126	$3.6M	7
Radiation Oncology	81,246	$6.0M	12
Clinical Psychologist	66,599	$5.0M	84
Interventional Radiology	55,662	$7.4M	8
Endocrinology	53,979	$3.2M	11
Mental Health Counselor	51,097	$3.9M	70
Qualified Audiologist	37,395	$1.5M	31
Registered Dietitian or Nutrition Professional	32,626	$670K	7
Vascular Surgery	22,186	$1.8M	4
Certified Registered Nurse Anesthetist (CRNA)	21,973	$407K	14
Critical Care (Intensivists)	12,416	$1.6M	8
General Practice	11,157	$986K	7
Geriatric Medicine	9,924	$809K	3
Cardiac Surgery	9,842	$2.4M	2
Hand Surgery	9,272	$362K	3
Sleep Medicine	5,252	$677K	1
Plastic and Reconstructive Surgery	4,511	$306K	12
Neurosurgery	3,760	$392K	9
Dentist	3,706	$190K	1
Colorectal Surgery (Proctology)	3,078	$308K	3
Cardiac Electrophysiology	2,591	$131K	2
Osteopathic Manipulative Medicine	2,293	$60K	2
Oral Surgery	1,293	$151K	3
Qualified Speech Language Pathologist	886	$45K	2
Neuropsychiatry	852	$52K	1
Physician Assistant	793	$29K	3
Marriage and Family Therapist	623	$69K	1
Pediatric Medicine	512	$25K	3
Hospice/Palliative Care	382	$17K	2
Surgical Oncology	314	$102K	1
Certified Nurse Midwife (CNM)	252	$14K	1
Maxillofacial Surgery	161	$10K	3
Preventive Medicine	97	$5K	1

Ranked by services billed. Each linked specialty opens its highest-billed code in Illinois; when that code is not shown, it opens the specialty's own page.

Illinois hospital inpatient by MS-DRG

Hospital inpatient stays in Illinois, by MS-DRG · FY2024 (Oct–Sep)

MS-DRG	Discharges	Share of national
871 · SEPTICEMIA OR SEVERE SEPSIS WITHOUT MV >96 HOURS WITH MCC	23,266	4.0%
291 · HEART FAILURE AND SHOCK WITH MCC	15,192	5.0%
177 · RESPIRATORY INFECTIONS AND INFLAMMATIONS WITH MCC	6,849	4.8%
193 · SIMPLE PNEUMONIA AND PLEURISY WITH MCC	5,667	4.1%
872 · SEPTICEMIA OR SEVERE SEPSIS WITHOUT MV >96 HOURS WITHOUT MCC	4,461	4.2%
690 · KIDNEY AND URINARY TRACT INFECTIONS WITHOUT MCC	4,375	4.6%
189 · PULMONARY EDEMA AND RESPIRATORY FAILURE	4,268	4.6%
392 · ESOPHAGITIS, GASTROENTERITIS AND MISCELLANEOUS DIGESTIVE DISORDERS WITHOUT MCC	4,055	4.5%
683 · RENAL FAILURE WITH CC	3,930	4.8%
280 · ACUTE MYOCARDIAL INFARCTION, DISCHARGED ALIVE WITH MCC	3,693	4.2%
689 · KIDNEY AND URINARY TRACT INFECTIONS WITH MCC	3,683	4.4%
698 · OTHER KIDNEY AND URINARY TRACT DIAGNOSES WITH MCC	3,660	4.7%
682 · RENAL FAILURE WITH MCC	3,528	4.5%
378 · GASTROINTESTINAL HEMORRHAGE WITH CC	3,501	4.4%
853 · INFECTIOUS AND PARASITIC DISEASES WITH O.R. PROCEDURES WITH MCC	3,485	4.2%
640 · MISCELLANEOUS DISORDERS OF NUTRITION, METABOLISM, FLUIDS AND ELECTROLYTES WITH MCC	3,368	4.3%
885 · PSYCHOSES	3,228	7.7%
065 · INTRACRANIAL HEMORRHAGE OR CEREBRAL INFARCTION WITH CC OR TPA IN 24 HOURS	3,088	4.3%
603 · CELLULITIS WITHOUT MCC	3,023	5.0%
641 · MISCELLANEOUS DISORDERS OF NUTRITION, METABOLISM, FLUIDS AND ELECTROLYTES WITHOUT MCC	2,918	4.4%
309 · CARDIAC ARRHYTHMIA AND CONDUCTION DISORDERS WITH CC	2,832	4.3%
064 · INTRACRANIAL HEMORRHAGE OR CEREBRAL INFARCTION WITH MCC	2,784	4.1%
481 · HIP AND FEMUR PROCEDURES EXCEPT MAJOR JOINT WITH CC	2,684	4.0%
470 · MAJOR HIP AND KNEE JOINT REPLACEMENT OR REATTACHMENT OF LOWER EXTREMITY WITHOUT MCC	2,535	3.9%
312 · SYNCOPE AND COLLAPSE	2,466	4.3%

Top 25 of 670 MS-DRGs with published discharges in Illinois, ranked by discharges. Share is this state's discharges against the DRG's national total (both from CMS's by-geography inpatient file, so a share never exceeds 100%). Each DRG opens its market for Illinois. Discharges are counted stays under Medicare fee-for-service Part A (no Medicare Advantage), Maryland waiver-priced.

Illinois Part D medications

Part D medications prescribed in Illinois, by claims · CY2024

Medication	Claims	30-day fills	Share of national
Atorvastatin Calcium	2.9M	7.1M	4.0%
Amlodipine Besylate	1.8M	4.4M	3.7%
Levothyroxine Sodium	1.6M	3.6M	3.6%
Metoprolol Succinate	1.4M	3.3M	4.2%
Lisinopril	1.4M	3.3M	3.7%
Losartan Potassium	1.3M	3.1M	3.5%
Gabapentin	1.2M	1.9M	3.2%
Furosemide	958K	1.8M	4.1%
Omeprazole	954K	2.1M	3.3%
Metformin Hcl	937K	2.2M	3.9%
Rosuvastatin Calcium	935K	2.5M	3.0%
Pantoprazole Sodium	914K	1.9M	3.6%
Apixaban · Eliquis	904K	1.5M	3.8%
Hydrocodone/Acetaminophen · Hydrocodone-Acetaminophen	858K	858K	4.3%
Tamsulosin Hcl	781K	1.7M	3.6%
Hydrochlorothiazide	711K	1.8M	3.9%
Carvedilol	633K	1.4M	4.0%
Albuterol Sulfate · Albuterol Sulfate Hfa	627K	743K	3.4%
Metoprolol Tartrate	623K	1.3M	3.9%
Potassium Chloride	582K	1.0M	4.0%
Sertraline Hcl	578K	1.1M	3.6%
Prednisone	565K	680K	3.6%
Simvastatin	553K	1.4M	3.7%
Tramadol Hcl	536K	546K	4.1%
Trazodone Hcl	527K	888K	2.9%

Ranked by claims: the 25 of 2,542 medications CMS publishes for Illinois with the most claims in CY2024. Medications are shown as CMS prints them, at the brand-and-generic grain CMS publishes. Geography is the prescriber's state as CMS files it: claims are counted where the prescriber sits, not where the pharmacy or the patient is. A claim is one dispensed fill, refills included; it is not a prescription written and not a patient count. 30-day fills restate claims to a 30-day supply, so a 90-day fill counts as three. Share is this state's claims against the total CMS publishes for the medication nationally. Claims are Medicare Part D drug-plan claims, Medicare Advantage plans included. Drug cost and prescriber figures are not part of this page.

Figures are attributable Medicare billing: each service is credited to a physician group only when the clinician who billed it belongs to exactly one group in CMS's Doctors and Clinicians register. Clinicians registered with more than one group, and groups without a specialty label, are not included in the specialty table above.

The physician-billing figures are Medicare fee-for-service Part B, and the hospital inpatient figures Medicare fee-for-service Part A — Medicare Advantage is not included in these. The Part D medication claims are the exception: they are drug-plan claims and include Medicare Advantage drug plans. A county- or city-level total for Illinois is not published here — see methods for why. Search a specific procedure code and state on the code browser for the ranked physician groups behind these totals.