Dr. Mark O'Connor, MD
What this data tells you about Dr. O'Connor
Dr. Mark O'Connor is a clinical cardiac electrophysiology physician in Toledo, OH, with 20 years of NPI registration. Based on federal Medicare data, Dr. O'Connor performed 2,570 Medicare services across 1,728 unique beneficiaries.
Between the years covered by Open Payments, Dr. O'Connor received a total of $2,352 from 18 pharmaceutical and/or device companies across 36 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in clinical cardiac electrophysiology physician. 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. O'Connor 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.
Medicare Practice Summary
Medicare Utilization ↗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 |
|---|---|---|---|
| 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. |
817 | $10 | $95 |
| 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. |
802 | $84 | $148 |
| Pacemaker programming, dual lead system Adjustment and configuration of a dual-lead pacemaker device to ensure proper operation and settings. |
194 | $53 | $175 |
| EKG interpretation and report A standard electrocardiogram test that records the heart's electrical activity using at least 12 leads. The service includes a professional interpretation of the results and a written report. |
144 | $6 | $23 |
| Implantable defibrillator system check A check of the implanted defibrillator device to ensure it is functioning correctly. This evaluation covers single, dual, or multiple lead systems. |
103 | $54 | $170 |
| Programming of single lead implantable defibrillator system Adjustment and testing of the settings for a single-lead implantable cardioverter-defibrillator (ICD) to ensure proper function. |
60 | $56 | $180 |
| Programming of multiple lead implantable defibrillator system Adjustment and testing of the settings for an implanted heart device with multiple leads to ensure proper function. |
58 | $75 | $225 |
| 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. |
57 | $92 | $175 |
| 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. |
37 | $41 | $500 |
| Regadenoson injection (Lexiscan) for heart stress test An injection of regadenoson, a medication used to stress the heart during diagnostic testing. |
37 | $46 | $80 |
| Technetium Tc-99m sestamibi diagnostic injection A diagnostic injection of technetium Tc-99m sestamibi used for imaging studies. |
36 | $27 | $220 |
| 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. |
35 | $134 | $250 |
| Evaluation of implantable heart and blood vessel monitoring system This procedure involves checking the function and data of an implanted device used to monitor heart and blood vessel activity. |
29 | $38 | $200 |
| 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. |
25 | $127 | $195 |
| Cardiac rhythm monitor evaluation Review and analysis of data recorded by a cardiac rhythm monitoring device to assess heart activity. |
23 | $37 | $100 |
| Cardiac rhythm monitor programming Adjustment and configuration of an implanted cardiac rhythm monitoring device to ensure proper operation and data collection. |
21 | $44 | $125 |
| Programming of dual lead implantable defibrillator system Adjustment and testing of the settings for an implanted heart device with two leads to ensure proper function. |
16 | $46 | $225 |
| Normal saline infusion, 250 cc Administration of 250 cubic centimeters of normal saline solution into a vein. This procedure involves the intravenous delivery of a sterile saltwater fluid. |
16 | $1 | $50 |
| Aminophylline injection, up to 250 mg Administration of aminophylline medication via injection for a dose of up to 250 mg. |
14 | $7 | $20 |
| Pacemaker programming, single lead Adjustment and testing of a single-lead pacemaker to ensure it functions correctly. |
12 | $41 | $145 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
12 | $132 | $1,100 |
| 2-day continuous ECG with review and report A two-day continuous electrocardiogram recording that includes a professional review and written report of the results. |
11 | $37 | $400 |
| Remote monitoring of implantable heart rhythm device Evaluation of data transmitted remotely from an implantable cardiovascular monitor, such as a loop recorder or subcutaneous cardiac rhythm monitor, over a period up to 30 days. |
11 | $48 | $195 |
Industry Payment Transparency
Open Payments through 2023 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2023)
All-time payments by company (2018-2023) ›
Associated products mentioned in payments ›
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
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 2023 |
| 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. O'Connor is an electrophysiology & device specialist, with moderate Medicare volume, with low-engagement industry engagement, 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
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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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