Medicare Enrolled
Dr. Karen Quirk, MD
Surgery · Oxnard, CA
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. Quirk 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. Quirk?
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What this data tells you about Dr. Quirk
Dr. Karen Quirk is a surgery specialist in Oxnard, CA, with 18 years of NPI registration. Based on federal Medicare data, Dr. Quirk performed 1,304 Medicare services across 640 unique beneficiaries.
Between the years covered by Open Payments, Dr. Quirk received a total of $8,036 from 44 pharmaceutical and/or device companies across 201 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in surgery. 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. Quirk 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.
✓ 18 years in practice
▲ Top 7% volume in CA
$8,036 industry payments
Medicare Practice Summary
Medicare Utilization ↗1,304
Medicare services
Top 7% in CA for surgery
640
Unique beneficiaries
$374
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~72 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 (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. |
282 | $74 | $120 |
| 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. |
177 | $107 | $174 |
| Strapping, unna boot | 118 | $78 | $195 |
| Additional sedation, per 15 minutes Administration of a drug to deepen sedation during a procedure. This code covers each additional 15-minute increment of sedation beyond the initial period. |
104 | $10 | $61 |
| 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. |
95 | $166 | $720 |
| Ultrasound guidance for blood vessel access Use of ultrasound imaging to help locate and access a blood vessel. This guidance assists healthcare providers in performing procedures such as inserting IV lines or drawing blood. |
88 | $36 | $117 |
| Chemical injection for multiple incompetent leg veins A procedure involving the injection of a chemical agent into several non-functioning veins in the leg. |
69 | $233 | $786 |
| Chemical destruction of first incompetent vein with imaging guidance This procedure uses imaging guidance to chemically destroy the first incompetent vein in the arm or leg. |
53 | $1,574 | $4,794 |
| 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. |
45 | $132 | $300 |
| 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. |
39 | $90 | $240 |
| 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. |
32 | $199 | $840 |
| 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. |
29 | $101 | $270 |
| Balloon dilation of dialysis access with radiologist review A minimally invasive procedure to widen a narrowed section of a dialysis access vessel using a balloon catheter. The procedure includes review by a radiologist to ensure proper placement and effectiveness. |
26 | $547 | $9,000 |
| Sedation by physician, initial 15 minutes Administration of a drug to induce depression of consciousness by the physician performing a procedure. This code covers the initial 15 minutes of sedation for patients aged 5 years or older. |
25 | $46 | $174 |
| 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. |
24 | $64 | $132 |
| Radiologist review of abdominal aorta image A radiologist reviews images of the abdominal aorta to evaluate the blood vessel. |
22 | $111 | $1,560 |
| Hemodialysis circuit intervention with balloon dilation A procedure to insert a needle or tube into a hemodialysis circuit and dilate the dialysis segment using a balloon, with radiological review. |
21 | $1,119 | $4,500 |
| Arterial plaque removal, initial vessel A procedure to remove plaque buildup from an artery in the leg. This is performed on the first vessel treated during the session. |
21 | $8,058 | $32,400 |
| Arterial plaque removal in leg A procedure to remove plaque buildup from the arteries in the leg to restore blood flow. |
20 | $4,377 | $33,600 |
| Ultrasound of arm or leg veins An ultrasound exam of the veins in one arm or leg using compression and other maneuvers to assess blood flow and check for blockages. |
14 | $87 | $474 |
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.
Industry Payment Transparency
Open Payments through 2024 ↗$8,036
Total received (2018-2024)
Avg $1,148/year across 7 years
Top 28% in CA for surgery
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
44
Companies
201
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
$8,036 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,033
2023
$681
2022
$1,042
2021
$1,851
2020
$526
2019
$1,956
2018
$947
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
W. L. Gore & Associates, Inc.
$597
Abbott Laboratories
$185
Medtronic, Inc.
$152
Smith+Nephew, Inc.
$29
Organogenesis Inc.
$27
Urgo Medical North America, LLC
$26
CARDIVA MEDICAL, INC.
$17
Top 3 companies account for 90.4% of 2024 payments
All-time payments by company (2018-2024) ›
Silk Road Medical, Inc.
$1,428
W. L. Gore & Associates, Inc.
$1,406
Medtronic, Inc.
$992
Medtronic Vascular, Inc.
$749
Boston Scientific Corporation
$540
Cook Medical LLC
$276
Janssen Pharmaceuticals, Inc
$230
Philips Electronics North America Corporation
$201
Abbott Laboratories
$198
CVRx, Inc.
$188
Cook Incorporated
$165
Penumbra, Inc.
$150
Smith+Nephew, Inc.
$134
Endologix LLC
$126
NuVasive, Inc.
$123
LeMaitre Vascular, Inc.
$120
Endologix, Inc.
$102
Tactile Systems Technology Inc
$84
Inari Medical, Inc.
$83
BAXTER HEALTHCARE
$70
LivaNova USA, Inc.
$64
Nevro Corp.
$50
Avinger Inc.
$46
Maquet Cardiovascular U.S. Sales, L.L.C.
$42
ACELL, INC.
$42
Cardiovascular Systems Inc.
$36
Integra LifeSciences Corporation
$30
ORGANOGENESIS INC.
$27
BOSTON SCIENTIFIC CORPORATION
$27
Organogenesis Inc.
$27
Urgo Medical North America, LLC
$26
CORDIS US CORP.
$25
Imperative Care, Inc
$23
Osiris Therapeutics Inc.
$23
Getinge USA Sales, LLC
$22
AngioDynamics, Inc.
$22
Cardinal Health 200, LLC
$20
Teleflex LLC
$20
E.R. Squibb & Sons, L.L.C.
$20
AstraZeneca Pharmaceuticals LP
$18
CARDIVA MEDICAL, INC.
$17
Acera Surgical, Inc.
$16
Smith & Nephew, Inc.
$15
Apria Healthcare LLC
$14
Top 3 companies account for 47.6% of all-time payments
Associated products mentioned in payments ›
(4067) Tack Endo Sys BTK · (6554) Peripheral Vascular Undivided · (6577) Visions 014 · ABRE · ALIF · ANGIOJET · ARTEGRAFT · AVVIGO Guidance System · Abre · Alto Abdominal Stent Graft System · BRILINTA · Barostim Neo System · C3 Delivery System · CARDIVA VASCADE 6/7F VCS · CHAMELEON · CONCERTOTM · ClosureFast · Concerto · Cook Medical AAA · Cook Medical AFEN · Cook Medical Advanced Tech · Cook Medical Stents · Cook Medical Zilver PTX · DIAMONDBACK PERIPHERAL · ELIQUIS · ELUVIA · ENDURANT IIS · ENHANCE Transcarotid Peripheral Access Kit · ENROUTE .014 Guidewire · ENROUTE Transcarotid Neuroprotection System · ENROUTE Transcarotid Stent · EVERFLEX · EXCLUDER AAA Endoprosthesis · EXCLUDER Conformable AAA Endoprosthesis with Active Control · EXCLUDER Iliac Branch Endoprosthesis · Endurant · EverFlex · FLEXITOUCH · FLIXENE · FLOWTRIEVER CATHETER · Flexitouch Plus · GENERAL METALLIC STENTS · GENERAL ATHERECTOMY · GORE EXCLUDER AAA Endoprosthesis · GORE EXCLUDER Iliac Branch Endoprosthesis · GORE TAG Conformable Thoracic Endoprosthesis · GORE TAG Conformable Thoracic Stent Graft · GORE VIABAHN VBX Balloon Expandable Endo · GRAFIX · GRAFIX PL · Grafix PL PRIME · HAWKONE · HYDRO LEMAITRE VALVULOTOME · HawkOne · IN.PACT AV · IN.PACT Admiral · Indigo System · Integra · Lasers · Manta · Medela · Omnia · OptiCross 35 · Ovation · PANTHERIS · PROCOL · PRODIGY CATHETER · Perclose ProGlide suture mediated closure system · Peripheral Orbital Atherectomy System · Puraply · RADIAL 360 · RESTOREFLO · RESTOREFLOW · Renal - PD · Restrata Wound Matrix · S · STRAVIX · Santyl · SpiderFX · Stravix · TURBOHAWK · Trilogy 100 · TurboHawk · VALVULOTOM · VASHE WOUND SOLUTION 250 ML (8.5 FL OZ) FLIP TOP CAP · VENASEAL · VIABAHN VBX Balloon Expandable Endoprosthesis · VNS Therapy · Valiant Captivia · Varithena Administration Pack · VenaSeal · Viance · XARELTO · ZENITH ALPHA · Zenith · iCAST
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 (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Surgerists within 10 mi
55
Per 100K population
6.6
County median income
$107,327
Nearest hospital
ST JOHNS REGIONAL MEDICAL CENTER
3.2 mi
3.2 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. Quirk is a clinical cardiology specialist, with above-average Medicare volume (top 7% in CA), with low-engagement industry engagement, with 18 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. Quirk experienced with office visit, established patient (20-29 min)?
Based on Medicare claims data, Dr. Quirk performed 282 office visit, established patient (20-29 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. Quirk receive payments from pharmaceutical companies?
Yes. Dr. Quirk received a total of $8,036 from 44 companies across 201 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. Quirk's costs compare to other surgerists in Oxnard?
Dr. Quirk's average Medicare payment per service is $374. 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. Quirk) 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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