Medicare Enrolled
Dr. Jaroslaw Leszczak, MD
Internal Medicine · Park Ridge, IL
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
Low-engagement
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Leszczak from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Leszczak
Dr. Jaroslaw Leszczak is an internal medicine specialist in Park Ridge, IL, with 20 years of NPI registration. Based on federal Medicare data, Dr. Leszczak performed 6,183 Medicare services across 2,568 unique beneficiaries.
Between the years covered by Open Payments, Dr. Leszczak received a total of $14,043 from 58 pharmaceutical and/or device companies across 705 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in internal medicine. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Leszczak is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 20 years in practice
▲ Top 3% volume in IL
$14,043 industry payments
Medicare Practice Summary
Medicare Utilization ↗6,183
Medicare services
Top 3% in IL for internal medicine
2,568
Unique beneficiaries
$58
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~309 Medicare services per year of practice
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
1,609 | $93 | $220 |
| Office visit for established patient An office visit for an existing patient that may not require the healthcare professional to be present. |
444 | $18 | $49 |
| Physical therapy exercise, per 15 min A therapy session using exercises to improve strength, endurance, range of motion, and flexibility. Each 15-minute unit is billed separately. |
420 | $18 | $50 |
| Manual therapy (hands-on treatment), per 15 min | 377 | $17 | $45 |
| Joint injection, major joint Removal of fluid from a large joint and/or injection of medication into the joint space. |
318 | $52 | $250 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
217 | $62 | $150 |
| Neuromuscular re-education therapy, per 15 min A therapy procedure designed to re-educate the functional connection between the brain, nerves, and muscles. It is billed in 15-minute increments. |
204 | $27 | $50 |
| Walking/gait training therapy, per 15 min A therapy session focused on training walking skills. The service is billed in 15-minute increments. |
203 | $19 | $50 |
| Electrical stimulation therapy, per 15 minutes Application of electrical stimulation to the body with a therapist present. The service is billed for each 15-minute increment of treatment. |
200 | $10 | $30 |
| Drug injection, under skin or into muscle A procedure involving the administration of a medication or substance via injection into the subcutaneous tissue or muscle. |
184 | $11 | $50 |
| Annual alcohol misuse screening, 5 to 15 minutes | 173 | $19 | $31 |
| Annual depression screening | 169 | $19 | $31 |
| Orthovisc intra-articular injection An injection of hyaluronan or its derivative into a joint space to provide lubrication and cushioning. |
150 | $98 | $500 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
145 | $137 | $300 |
| Methylprednisolone acetate injection, 80 mg An injection of 80 mg of methylprednisolone acetate, a corticosteroid medication. |
120 | $9 | $80 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
115 | $1 | $20 |
| Electrocardiogram (EKG), 12-lead A standard heart rhythm test using at least 12 leads to record electrical activity. A healthcare provider interprets the results and provides a written report. |
79 | $11 | $95 |
| Technetium Tc-99m sestamibi diagnostic injection A diagnostic injection of technetium Tc-99m sestamibi used for imaging studies. |
75 | $97 | $950 |
| Regadenoson injection (Lexiscan) for heart stress test An injection of regadenoson, a medication used to stress the heart during diagnostic testing. |
73 | $46 | $158 |
| Hospital follow-up visit, high complexity Subsequent hospital inpatient or observation care for an existing patient involving high-level medical decision making, with at least 50 minutes total time on the date of the encounter. |
71 | $102 | $275 |
| Ketorolac injection, per 15 mg An injection of ketorolac tromethamine, a nonsteroidal anti-inflammatory drug, administered in doses measured per 15 mg. |
68 | $0 | $10 |
| Injection, methylprednisolone acetate, 40 mg | 54 | $6 | $40 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
53 | $151 | $650 |
| Viscosupplementation injection for joint An injection of hyaluronic acid or a derivative into a joint to provide lubrication and cushioning. |
53 | $58 | $270 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
52 | $145 | $300 |
| Ultrasound of head and neck blood flow, bilateral An ultrasound exam that uses sound waves to visualize and assess blood flow in the vessels of both the head and the neck. |
46 | $141 | $660 |
| Nuclear stress test of heart muscle A nuclear medicine imaging test that evaluates blood flow to the heart muscle at rest and during stress using a special camera. |
38 | $306 | $1,533 |
| Intravenous drug injection A procedure involving the administration of a medication or substance directly into a vein. |
38 | $32 | $181 |
| Home health agency supervision, complex multidisciplinary care Supervision by a physician or allowed practitioner for a patient receiving Medicare-covered services from a participating home health agency. This involves complex and multidisciplinary care modalities, with the patient not present during the supervision. |
38 | $82 | $345 |
| Transitional care management, high complexity Coordination of care for a patient transitioning from a short-term hospital stay or other facility to home or another care setting. This service addresses a high-complexity medical problem. |
36 | $229 | $475 |
| Complete ultrasound of abdomen A diagnostic imaging test that uses sound waves to create detailed pictures of the organs and structures within the abdomen. |
31 | $90 | $445 |
| Telephone medical discussion, 5-10 minutes A phone conversation with a physician lasting between 5 and 10 minutes to discuss medical matters. |
29 | $36 | $45 |
| Evaluation for physical therapy, typically 30 minutes | 27 | $72 | $135 |
| Ultrasound of leg arteries or grafts An imaging test that uses sound waves to create pictures of the blood vessels in the legs or any surgical grafts present. |
22 | $196 | $845 |
| Home health plan of care certification Certification by a physician or allowed practitioner for Medicare-covered home health services under a home health plan of care. This includes contacting the home health agency and reviewing reports of patient status required by physicians. |
21 | $40 | $172 |
| Joint fluid aspiration or injection, medium joint Removal of fluid from a medium-sized joint or injection of medication into the joint space. |
20 | $37 | $200 |
| Exercise or drug-induced heart stress test with ECG A heart stress test performed using exercise or medication while an electrocardiogram is monitored under physician supervision. |
19 | $17 | $75 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
19 | $13 | $71 |
| Initial preventive physical examination, new Medicare beneficiary A comprehensive preventive health visit for new Medicare beneficiaries during their first 12 months of enrollment. The service is conducted as a face-to-face visit and is limited to preventive care. |
19 | $176 | $412 |
| Ultrasound of arm or leg veins An ultrasound exam of the veins in the arm or leg. The test uses sound waves to check blood flow and may include compression and other maneuvers. |
18 | $146 | $646 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
17 | $148 | $400 |
| Hospital discharge management, 30+ min This service covers the care provided by a physician or qualified healthcare professional on the day a patient is discharged from the hospital. It requires more than 30 minutes of total time spent on the day of discharge. |
17 | $98 | $275 |
| Ultrasound of head and neck soft tissue This procedure uses sound waves to create images of the soft tissues in the head and neck area. It allows for the visualization of structures beneath the skin without using radiation. |
15 | $86 | $367 |
| Complete ultrasound of aorta, vena cava, groin vessels or bypass grafts A complete ultrasound exam of the aorta, vena cava, groin vessels, or bypass grafts. This imaging test uses sound waves to visualize these blood vessels. |
15 | $129 | $650 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
15 | $84 | $300 |
| Annual wellness visit, initial visit A yearly appointment to review your health and create a personalized prevention plan. This initial visit focuses on preventive care and health assessment. |
15 | $176 | $350 |
| Ear wax removal A procedure to remove impacted ear wax from the ear canal. |
14 | $36 | $149 |
| Complete ultrasound of retroperitoneum An ultrasound examination of the structures located behind the abdominal cavity. |
14 | $89 | $357 |
| Exercise or drug-induced heart stress test with ECG A heart stress test performed using exercise or medication while monitoring the electrocardiogram under physician supervision and review. |
14 | $59 | $279 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
1.1% high complexity
24.3% medium
74.6% routine
Industry Payment Transparency
Open Payments through 2024 ↗$14,043
Total received (2018-2024)
Avg $2,006/year across 7 years
Top 5% in IL for internal medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
58
Companies
705
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$12,766 (90.9%)
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$1,277 (9.1%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,687
2023
$1,488
2022
$1,849
2021
$3,271
2020
$1,436
2019
$2,019
2018
$2,293
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Novo Nordisk Inc
$580
ABBVIE INC.
$182
AstraZeneca Pharmaceuticals LP
$182
Novartis Pharmaceuticals Corporation
$115
Amgen Inc.
$104
Lilly USA, LLC
$98
PFIZER INC.
$73
Almatica Pharma LLC
$52
Azurity Pharmaceuticals, Inc.
$40
Esperion Therapeutics, Inc.
$39
Merck Sharp & Dohme LLC
$39
Actelion Pharmaceuticals US, Inc.
$35
Sumitomo Pharma America, Inc.
$30
Bayer Healthcare Pharmaceuticals Inc.
$27
Lundbeck LLC
$25
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.)
$19
Otsuka America Pharmaceutical, Inc.
$17
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$15
Phadia US Inc.
$14
Top 3 companies account for 56.0% of 2024 payments
All-time payments by company (2018-2024) ›
Novo Nordisk Inc
$2,467
Biohaven Pharmaceuticals, Inc.
$1,277
Boehringer Ingelheim Pharmaceuticals, Inc.
$868
Lilly USA, LLC
$819
AstraZeneca Pharmaceuticals LP
$696
PFIZER INC.
$689
Novartis Pharmaceuticals Corporation
$567
ABBVIE INC.
$564
AbbVie Inc.
$466
Janssen Pharmaceuticals, Inc
$427
Amgen Inc.
$403
Takeda Pharmaceuticals U.S.A., Inc.
$349
Allergan, Inc.
$339
Allergan Inc.
$324
Merck Sharp & Dohme Corporation
$295
Merck Sharp & Dohme LLC
$279
Amarin Pharma Inc.
$272
IBSA Pharma Inc.
$201
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$192
ARBOR PHARMACEUTICALS, INC.
$186
Almatica Pharma LLC
$182
GlaxoSmithKline, LLC.
$147
Astellas Pharma US Inc
$140
Esperion Therapeutics, Inc.
$130
AbbVie, Inc.
$124
Currax Pharmaceuticals LLC
$105
Azurity Pharmaceuticals, Inc.
$105
Sumitomo Pharma America, Inc.
$104
Bayer Healthcare Pharmaceuticals Inc.
$95
Biohaven Pharmaceutical Holding Company Ltd.
$90
Kowa Pharmaceuticals America, Inc.
$81
VIVUS, Inc.
$77
Janssen Biotech, Inc.
$72
Bausch Health US, LLC
$70
MannKind Corporation
$63
Arbor Pharmaceuticals, Inc.
$53
E.R. Squibb & Sons, L.L.C.
$52
Exact Sciences Corporation
$49
SANOFI-AVENTIS U.S. LLC
$49
Ironwood Pharmaceuticals, Inc
$47
Otsuka America Pharmaceutical, Inc.
$45
Alfasigma USA, Inc.
$43
Phadia US Inc.
$42
Lundbeck LLC
$41
Axsome Therapeutics, Inc.
$40
Sunovion Pharmaceuticals Inc.
$39
Actelion Pharmaceuticals US, Inc.
$35
Nestle HealthCare Nutrition Inc.
$35
Paratek Pharmaceuticals, Inc.
$34
Synergy Pharmaceuticals Inc
$29
Mannkind Corporation
$24
DEXCOM, INC.
$22
EISAI INC.
$22
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.)
$19
Corium, LLC
$19
SANOFI PASTEUR INC.
$14
Nalpropion Pharmaceuticals LLC
$14
Metuchen Pharmaceuticals
$12
Top 3 companies account for 32.8% of all-time payments
Associated products mentioned in payments ›
ADACEL · AFREZZA · AIRSUPRA · APLENZIN · Adlarity · Aimovig · Amitiza · Auvelity · BASAGLAR · BELSOMRA · BREO · BREZTRI · BREZTRI AEROSPHERE · BYDUREON · BYSTOLIC · BYVALSON · Belviq · CAPLYTA · CHANTIX · COMIRNATY · CONTRAVE · Cologuard Collection Kit · Creon · DEXCOM G6 TRANSMITTER · EDARBI · ELIQUIS · EMGALITY · ENTRESTO · EUCRISA · Edarbi · Edarbyclor · FARXIGA · GEMTESA · GRALISE · HUMALOG · INVOKANA · ImmunoCAP · JANUVIA · JARDIANCE · Kerendia · LINZESS · LOREEV XR · LYRICA · Licart · Linzess · Livalo · MOUNJARO · MYRBETRIQ · NEXLETOL · NURTEC ODT · NUZYRA · OPSUMIT · Otezla · Ozempic · PANCREAZE · PREVNAR - 13 · PREVNAR 20 · Prolia · QSYMIA · QULIPTA · REXULTI · RYBELSUS · Rybelsus · SIMPONI · SOLIQUA · STEGLATRO · STIOLTO RESPIMAT · SYMBICORT · Saxenda · Stendra · Synthroid · TERIPARATIDE · TOUJEO · TRADJENTA · TRELEGY ELLIPTA · TRINTELLIX · TRULANCE · TRULICITY · Tirosint · Tresiba · Trintellix · Trulance · UBRELVY · VERQUVO · VIBERZI · VIIBRYD · VRAYLAR · Vascepa · Victoza · Wegovy · XARELTO · XIFAXAN · ZENPEP
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Most payments (91%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians. Total industry engagement is in the top 5% for internal medicine in IL.
Geographic Context
Internal medicine physicians within 10 mi
6,164
Per 100K population
118.9
County median income
$81,797
Nearest hospital
ADVOCATE LUTHERAN GENERAL HOSPITAL
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Leszczak is a clinical cardiology specialist, with above-average Medicare volume (top 3% in IL), with low-engagement industry engagement in the top 5% of IL peers, with 20 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Leszczak experienced with office visit, established patient (30-39 min)?
Based on Medicare claims data, Dr. Leszczak performed 1,609 office visit, established patient (30-39 min) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Leszczak receive payments from pharmaceutical companies?
Yes. Dr. Leszczak received a total of $14,043 from 58 companies across 705 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Leszczak's costs compare to other internal medicine physicians in Park Ridge?
Dr. Leszczak's average Medicare payment per service is $58. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Leszczak) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
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About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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