Medicare Enrolled
Dr. James Clark, M.D.
Gastroenterology · Downers Grove, IL
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
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. Clark 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 →
Are you Dr. Clark?
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What this data tells you about Dr. Clark
Dr. James Clark is a gastroenterology specialist in Downers Grove, IL, with 20 years of NPI registration. Based on federal Medicare data, Dr. Clark performed 1,237 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Clark received a total of $15,153 from 53 pharmaceutical and/or device companies across 798 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Clark 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 of NPI registration
▲ Top 17% volume in IL
$15,153 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗1,237
Medicare services
Top 17% in IL for gastroenterology
Not available
Unique patients (not deduplicated)
$94
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
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 |
|---|---|---|---|
| Hospital follow-up visit, moderate complexity Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service. |
388 | $65 | $192 |
| 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. |
162 | $98 | $286 |
| Initial hospital admission, moderate complexity Initial hospital inpatient or observation care for a new patient involving moderate-level medical decision making, with at least 55 minutes total time on the date of the encounter. |
111 | $105 | $365 |
| Upper GI endoscopy with biopsy A procedure to collect tissue samples from the esophagus, stomach, or upper small intestine using a flexible tube with a camera. The samples are examined to check for abnormalities. |
110 | $74 | $1,350 |
| 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. |
91 | $125 | $300 |
| Colonoscopy with biopsy A procedure to collect tissue samples from the large intestine using a flexible tube with a camera. The samples are examined to check for abnormalities or disease. |
75 | $89 | $1,500 |
| Colon polyp removal with endoscopic snare This procedure removes polyps or growths from the large bowel using a flexible tube with a camera and a wire loop tool. The snare is used to cut off the growths during the examination. |
71 | $220 | $1,500 |
| 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. |
61 | $70 | $195 |
| New patient office visit, 15-29 minutes An initial office visit for a new patient lasting 15 to 29 minutes. This code is used when the total time spent on the date of the encounter meets this duration threshold. |
46 | $46 | $140 |
| Colonoscopy for colorectal cancer screening, high risk A colonoscopy performed to screen for colorectal cancer in individuals identified as being at high risk for the disease. |
28 | $192 | $1,400 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
24 | $79 | $200 |
| Balloon dilation of esophagus, stomach, or upper small bowel, less than 3.0 cm A procedure using a flexible endoscope to widen a narrowed section of the esophagus, stomach, or upper small bowel with a balloon that is less than 3.0 cm in length. |
23 | $106 | $1,600 |
| Colonoscopy A diagnostic exam of the large bowel using a flexible endoscope to visualize the interior of the colon. |
20 | $125 | $1,400 |
| Colonoscopy for colorectal cancer screening A colonoscopy performed to screen for colorectal cancer in individuals who are not at high risk for the disease. |
15 | $196 | $1,400 |
| Moderate sedation during GI endoscopy Sedation services provided by the physician performing a gastrointestinal endoscopic procedure. This requires an independent trained observer to assist in monitoring the patient. |
12 | $5 | $120 |
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. These counts do not measure clinical quality or years of experience.
Industry Payment Transparency
Open Payments through 2024 ↗$15,153
Total received (2018-2024)
Avg $2,165/year across 7 years
Top 15% in IL for gastroenterology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
53
Companies
798
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,316
2023
$1,376
2022
$1,504
2021
$2,833
2020
$1,997
2019
$3,179
2018
$2,948
Payments by company (2024)
Janssen Biotech, Inc.
$385
ABBVIE INC.
$362
Takeda Pharmaceuticals U.S.A., Inc.
$176
Gilead Sciences, Inc.
$112
EVOKE PHARMA, INC.
$49
QOL Medical, LLC
$49
Olympus America Inc.
$43
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$32
GENZYME CORPORATION
$26
Madrigal Pharmaceuticals
$24
Ardelyx, Inc.
$23
PFIZER INC.
$22
AIMMUNE THERAPEUTICS, INC.
$13
Top 3 companies account for 70.1% of 2024 payments
All-time payments by company (2018-2024) ›
Janssen Biotech, Inc.
$1,784
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$1,773
AbbVie Inc.
$1,714
Takeda Pharmaceuticals U.S.A., Inc.
$1,593
AbbVie, Inc.
$1,122
Gilead Sciences, Inc.
$983
ABBVIE INC.
$793
PFIZER INC.
$790
UCB, Inc.
$396
Allergan Inc.
$371
Braintree Laboratories, Inc.
$335
Mauna Kea Technologies, Inc.
$286
Shire North American Group Inc
$277
Ferring Pharmaceuticals Inc.
$262
Merck Sharp & Dohme Corporation
$260
QOL Medical, LLC
$215
RedHill Biopharma Inc.
$157
Ironwood Pharmaceuticals, Inc
$151
GENZYME CORPORATION
$148
Intercept Pharmaceuticals, Inc.
$130
Ethicon US, LLC
$127
Janssen Scientific Affairs, LLC
$124
Aries Pharmaceuticals, Inc.
$121
Celgene Corporation
$101
Prometheus Laboratories Inc.
$95
Abbott Laboratories
$94
Synergy Pharmaceuticals Inc
$94
BOSTON SCIENTIFIC CORPORATION
$86
Alfasigma USA, Inc.
$82
Nestle HealthCare Nutrition Inc.
$78
Ardelyx, Inc.
$77
EVOKE PHARMA, INC.
$64
Alexion Pharmaceuticals, Inc.
$59
Olympus America Inc.
$43
Romark Laboratories, LC
$33
Allergan, Inc.
$31
Stryker Corporation
$25
Madrigal Pharmaceuticals
$24
SI-BONE, INC.
$24
Alnylam Pharmaceuticals Inc.
$22
E.R. Squibb & Sons, L.L.C.
$21
Bayer HealthCare Pharmaceuticals Inc.
$18
IRONWOOD PHARMACEUTICALS, INC
$18
SANOFI-AVENTIS U.S. LLC
$18
Covidien LP
$18
INTERCEPT PHARMACEUTICALS, INC.
$17
Dova Pharmaceuticals
$16
IBSA Pharma Inc.
$16
Otsuka America Pharmaceutical, Inc.
$15
Dynavax Technologies Corporation
$15
NESTLE HEALTHCARE NUTRITION INC.
$13
AIMMUNE THERAPEUTICS, INC.
$13
Evoke Pharma, Inc.
$12
Top 3 companies account for 34.8% of all-time payments
Associated products mentioned in payments ›
AXIUM · Aemcolo · Alinia Tablets 500mg 30 count bottle · BREATHTEK · CIMZIA · CLENPIQ · CREON · Cimzia · Creon · DIFICID · DISPOSABLE BIOPSY FORCEPS · DUPIXENT · Dexilant · Doptelet · ELEVIEW · ENTYVIO · EOHILIA · EVIS EXERA III COLONOVIDEOSCOPE · EXALT · Entyvio · GATTEX · GIMOTI · GIVLAARI · HUMIRA · Heplisav-B · Humira · IBSRELA · IFUSE IMPLANT · LINX Reflux Management System · LINZESS · Licart · Linzess · MAVYRET · MOTEGRITY · Mavyret · Motegrity · OCALIVA · ORENCIA · PROCLAIM · PillCam · Proclaim IPG · REBYOTA · REMICADE · RESMETIROM · RINVOQ · SKYRIZI · SPINEJACK · STELARA · SUCRAID · SUPREP · SUPREP BOWEL PREP · SUTAB · SYNVISC-ONE · Stivarga · Sucraid · TRULANCE · Talicia · Trulance · UCERIS · ULTOMIRIS · Ultomiris · VIBERZI · WAVEWRITER ALPHA · XELJANZ · XIFAXAN · XIFIXAN · ZENPEP · ZEPATIER · ZEPOSIA · Zelnorm
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. 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 →
Geographic Context
Gastroenterologists in nearby ZIP areas
496
County median income
$110,502
Nearest hospital to ZIP centroid (approximate)
ADVOCATE GOOD SAMARITAN HOSPITAL
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | 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. Clark is a clinical cardiology specialist, with above-average Medicare volume (top 17% in IL), 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. Clark experienced with hospital follow-up visit, moderate complexity?
Based on Medicare claims data, Dr. Clark performed 388 hospital follow-up visit, moderate complexity services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Clark receive payments from pharmaceutical companies?
Yes. Dr. Clark received a total of $15,153 from 53 companies across 798 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. 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. Clark's costs compare to other gastroenterologists in Downers Grove?
Dr. Clark's average Medicare payment per service is $94. 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. Clark) 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 the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. 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?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: 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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