Medicare Enrolled
Dr. John Marks, MD
Colon & Rectal Surgery · Wynnewood, PA
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. Marks 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. Marks?
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What this data tells you about Dr. Marks
Dr. John Marks is a colon & rectal surgery specialist in Wynnewood, PA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Marks performed 805 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Marks received a total of $128,037 from 60 pharmaceutical and/or device companies across 251 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. Marks 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 22% volume in PA
$128,037 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗805
Medicare services
Top 22% in PA for colon & rectal surgery
Not available
Unique patients (not deduplicated)
$118
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 |
|---|---|---|---|
| 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. |
157 | $65 | $155 |
| Colonoscopy A diagnostic exam of the lower portion of the large bowel using a flexible endoscope. |
151 | $151 | $400 |
| 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. |
86 | $136 | $321 |
| 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. |
85 | $88 | $235 |
| 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. |
68 | $126 | $1,100 |
| New patient office visit, complex (60-74 min) | 54 | $176 | $466 |
| 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. |
53 | $65 | $147 |
| Colonoscopy A diagnostic exam of the large bowel using a flexible endoscope to visualize the interior of the colon. |
33 | $132 | $1,000 |
| 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. |
28 | $198 | $1,800 |
| 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. |
26 | $82 | $258 |
| 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. |
21 | $189 | $725 |
| 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. |
17 | $129 | $370 |
| Endoscopic partial release and removal of large bowel This procedure involves using an endoscope to partially release and remove part of the large bowel. |
14 | $154 | $520 |
| Anoscopy A diagnostic exam of the anus using a thin, lighted tube called an endoscope to look inside. |
12 | $93 | $230 |
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 ↗$128,037
Total received (2018-2024)
Avg $18,291/year across 7 years
Top 1% in PA for colon & rectal surgery
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
60
Companies
251
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
$27,550
2023
$22,087
2022
$8,625
2021
$20,854
2020
$7,931
2019
$22,045
2018
$18,944
Payments by company (2024)
Vascular Technology, Inc.
$12,000
Arthrex, Inc.
$10,986
Stryker Corporation
$3,286
Virtual Incision Corporation
$526
Ethicon Inc.
$245
TELA Bio, Inc.
$173
Teleflex LLC
$59
INTUITIVE SURGICAL, INC.
$56
CONMED Corporation
$50
Baxter Healthcare
$45
Ethicon US, LLC
$34
Aroa Biosurgery Incorporated
$27
La Jolla Pharmaceutical Company
$24
PFIZER INC.
$20
Myriad Genetic Laboratories, Inc.
$19
Top 3 companies account for 95.4% of 2024 payments
All-time payments by company (2018-2024) ›
Intuitive Surgical, Inc.
$35,686
Stryker Corporation
$32,902
Vascular Technology, Inc.
$23,000
Medtronic, Inc.
$12,447
Arthrex, Inc.
$11,388
Covidien LP
$7,129
Applied Medical Resources Corporation
$1,375
Virtual Incision Corporation
$526
CONMED Corporation
$294
Baxter Healthcare
$264
W. L. Gore & Associates, Inc.
$256
Ethicon Inc.
$245
Braintree Laboratories, Inc.
$229
TELA Bio, Inc.
$173
Takeda Pharmaceuticals U.S.A., Inc.
$166
DAVOL INC.
$161
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$157
Ethicon US, LLC
$104
Trevena, Inc.
$96
Activ Surgical, Inc.
$96
Merck Sharp & Dohme Corporation
$89
Shire North American Group Inc
$85
Transenterix, Inc.
$84
AcelRx Pharmaceuticals, Inc.
$68
Ferring Pharmaceuticals Inc.
$64
Teleflex LLC
$59
INTUITIVE SURGICAL, INC.
$56
Mallinckrodt LLC
$56
Boston Scientific Corporation
$44
ConvaTec Inc.
$43
Olympus America Inc.
$38
Genentech USA, Inc.
$37
Alfasigma USA, Inc.
$37
Mauna Kea Technologies, Inc.
$36
ACELL, INC.
$33
Aroa Biosurgery Incorporated
$27
Becton, Dickinson and Company
$27
Smith+Nephew, Inc.
$26
Avanos Medical
$25
Davol Inc.
$25
Smith & Nephew, Inc.
$25
Edwards Lifesciences Corporation
$24
THD AMERICA, INC.
$24
La Jolla Pharmaceutical Company
$24
Coloplast Corp
$22
BAXTER HEALTHCARE
$21
Medtronic USA, Inc.
$21
PFIZER INC.
$20
Myriad Genetic Laboratories, Inc.
$19
BOSTON SCIENTIFIC CORPORATION
$19
Maquet Cardiovascular U.S. Sales, L.L.C.
$19
Innocoll Incorporated
$17
Bayer HealthCare Pharmaceuticals Inc.
$17
Allergan Inc.
$17
Janssen Biotech, Inc.
$17
Creo Medical Inc.
$17
E.R. Squibb & Sons, L.L.C.
$16
Kowa Pharmaceuticals America, Inc.
$15
Integra LifeSciences Corporation
$15
Sirtex Medical Inc
$15
Top 3 companies account for 71.5% of all-time payments
Associated products mentioned in payments ›
1588 HD 3 CHIP CAMERA · 1688 · 1688 HD 3 CHIP CAMERA · 1788 · 4-K · AIRSEAL · ARISTA AH FlexiTip · Acticoat Range · ActivSight · AirSeal · Arthrex · Auto Suture · Avastin · BIO-A Tissue Reinforcement · BRIDION · CFN ChloraPrep · CLENPIQ · ClearSight System · DA VINCI SP · DSUVIA · Da Vinci Surgical System · EEA · ENDO GIA ULTRA · ENSEAL Product Family · ENTEREG · Echelon Circular · Echelon Powered Circular · Entyvio · FLOSEAL · GATTEX · GELPOINT VPATH · GENERAL PULMONARY · HET · INTEGRA MESHED BILAYER WOUND MATRIX · INTERSTIM · LIGASURE · LigaSure · MOTEGRITY · MOTOFEN · MYRISK · Mira · Motegrity · NATURA · NEW PRODUCT DEVELOPMENT · Natura · OFIRMEV · ON-Q* PUMP AND ACCESSORIES · OPDIVO · ORISE · Olinvyk · OviTex 2S · PHASIX · PICO · PICO Single Use Negative Pressure Wound Therapy · Pleuraglide · RELISTOR · SIGNIA · SIR-Spheres Microspheres · SOLESTA · SPEEDBOAT · SPY-PHI SYSTEM · STELARA · STRATTICE · SUFLAVE · SUPREP · SUPREP BOWEL PREP · SUTAB · SYNECOR Biomaterial · Seglentis · SenSura Mio · Senhance Surgical Robotics System · Sonicision · TISSEEL · TUKYSA · ThunderBeat · V-LOC 180 · VENTRIO · Valleylab · VersaOne · Vitrakvi · XARACOLL · XERAVA · XIFAXAN · XIFAXANIBSD · iDrive
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
Colon & rectal surgerists in nearby ZIP areas
42
County median income
$111,521
Nearest hospital to ZIP centroid (approximate)
MAIN LINE HOSPITAL LANKENAU
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. Marks is a clinical cardiology specialist, with above-average Medicare volume (top 22% in PA), 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. Marks experienced with office visit, established patient (20-29 min)?
Based on Medicare claims data, Dr. Marks performed 157 office visit, established patient (20-29 min) 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. Marks receive payments from pharmaceutical companies?
Yes. Dr. Marks received a total of $128,037 from 60 companies across 251 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. Marks's costs compare to other colon & rectal surgerists in Wynnewood?
Dr. Marks's average Medicare payment per service is $118. 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. Marks) 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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