Medicare Enrolled
Dr. Mark Byrne, M.D.
Interventional Cardiology · Watsonville, 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. Byrne 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. Byrne?
Request a correction or review of any data shown here. Provider portal →
What this data tells you about Dr. Byrne
Dr. Mark Byrne is an interventional cardiology specialist in Watsonville, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Byrne performed 10,038 Medicare services across 4,961 unique beneficiaries.
Between the years covered by Open Payments, Dr. Byrne received a total of $4,308 from 45 pharmaceutical and/or device companies across 206 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in interventional cardiology. 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. Byrne 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.
✓ 19 years in practice
▲ Top 9% volume in CA
$4,308 industry payments
Medicare Practice Summary
Medicare Utilization ↗10,038
Medicare services
Top 9% in CA for interventional cardiology
4,961
Unique beneficiaries
$70
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~528 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. |
2,391 | $102 | $180 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
1,025 | $8 | $10 |
| Office visit, established patient (10-19 min) An office visit for an existing patient lasting 10 to 19 minutes. The visit involves medical evaluation and management of the patient's condition. |
991 | $45 | $100 |
| Complete blood count (CBC) with differential An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood, including a breakdown of the different types of white blood cells. |
536 | $8 | $25 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
463 | $10 | $20 |
| Lipid panel (cholesterol and triglycerides) A blood test that measures cholesterol and triglyceride levels. |
379 | $13 | $30 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
327 | $173 | $548 |
| Regadenoson injection (Lexiscan) for heart stress test An injection of regadenoson, a medication used to stress the heart during diagnostic testing. |
312 | $42 | $75 |
| Hemoglobin A1c test (diabetes monitoring) A blood test that measures your average blood sugar levels over the past two to three months. |
290 | $10 | $25 |
| Technetium Tc-99m tetrofosmin diagnostic injection A diagnostic injection of Technetium Tc-99m tetrofosmin used for imaging studies. |
244 | $75 | $225 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
219 | $16 | $30 |
| External counterpulsation, per treatment session | 218 | $102 | $250 |
| 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. |
183 | $173 | $441 |
| 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. |
159 | $70 | $139 |
| Basic metabolic blood panel A blood test that measures a group of basic chemicals, including total calcium levels. |
139 | $8 | $25 |
| Chronic care management, first 20 min/month This service covers the first 20 minutes of clinical staff time directed by a healthcare professional each calendar month to manage chronic conditions. |
136 | $55 | $101 |
| 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. |
127 | $12 | $30 |
| 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. |
121 | $356 | $600 |
| 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. |
119 | $56 | $325 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
109 | $34 | $42 |
| Urinalysis, manual A manual laboratory examination of a urine sample to check for various substances and cells. |
101 | $3 | $15 |
| 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. |
101 | $60 | $364 |
| Autonomic nervous system testing with heart rate response to deep breathing This test evaluates the function of the autonomic nervous system by measuring how the heart rate changes in response to deep breathing. |
100 | $78 | $200 |
| Flu vaccine, quadrivalent A flu shot containing four strains of the influenza virus to help prevent seasonal influenza infection. |
95 | $76 | $80 |
| 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. |
92 | $11 | $50 |
| 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. |
91 | $241 | $320 |
| 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. |
84 | $227 | $397 |
| Ketorolac injection, per 15 mg An injection of ketorolac tromethamine, a nonsteroidal anti-inflammatory drug, administered in doses measured per 15 mg. |
77 | $0 | $14 |
| Chronic care management services Comprehensive assessment and care planning for patients requiring ongoing chronic care management. |
75 | $55 | $75 |
| Bone density scan (DEXA) A test that uses low-dose X-rays to measure bone mineral density in the hip, pelvis, and spine. It helps assess bone strength and risk of fractures. |
69 | $45 | $182 |
| 30-day continuous ECG with patient-triggered event transmission and review This procedure involves continuous electrocardiogram monitoring for up to 30 days, including the transmission of patient-triggered events. A healthcare professional reviews the data and provides a report. |
67 | $820 | $1,300 |
| Continuous ECG monitoring, up to 30 days Continuous heart rhythm monitoring for up to 30 days, including professional review and reporting of the results. |
66 | $21 | $100 |
| 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. |
63 | $89 | $127 |
| 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. |
56 | $91 | $250 |
| 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. |
50 | $161 | $300 |
| Ultrasound of arm and leg arteries A non-invasive imaging test that uses sound waves to examine the blood vessels in the arms and legs. It evaluates blood flow and checks for blockages or other vascular issues. |
47 | $97 | $214 |
| Ceftriaxone antibiotic injection This code represents the administration of ceftriaxone sodium, an antibiotic medication. The charge is calculated for every 250 mg of the drug administered. |
45 | $0 | $30 |
| 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. |
43 | $156 | $250 |
| 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. |
28 | $47 | $75 |
| Pacemaker system programming Adjustment and testing of a multi-lead pacemaker to ensure proper function and settings. |
27 | $71 | $180 |
| Blood glucose test using hand-held instrument A test that measures the level of sugar in the blood using a portable device. The result helps monitor blood glucose levels. |
26 | $3 | $20 |
| Natriuretic peptide level test A blood test that measures the level of natriuretic peptide, a protein produced by the heart and blood vessels. |
24 | $38 | $50 |
| Transitional care management services, moderate complexity Services provided to coordinate care during the transition from an inpatient or other facility setting back to the community. This includes follow-up and management of a health problem of at least moderate complexity. |
21 | $179 | $260 |
| Ear wax removal A procedure to remove impacted ear wax from the ear canal. |
17 | $36 | $75 |
| Home health plan of care re-certification A physician reviews the patient's status and contacts the home health agency to re-certify the plan of care without the patient being present. |
17 | $38 | $75 |
| Inhaled albuterol and ipratropium bromide via DME Administration of FDA-approved albuterol and ipratropium bromide medication through durable medical equipment. |
17 | $0 | $15 |
| Quadrivalent influenza vaccine, preservative-free A flu shot containing four strains of the influenza virus, formulated without preservatives, administered in a 0.5 ml dose. |
14 | $22 | $35 |
| 30-day continuous ECG with symptom monitoring This procedure involves continuous electrocardiogram monitoring for up to 30 days, including symptom tracking and a professional review and report of the results. |
13 | $170 | $260 |
| Follow-up heart ultrasound An ultrasound of the heart performed to monitor or reassess a previously identified condition or treatment progress. |
12 | $90 | $125 |
| 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. |
12 | $109 | $260 |
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.
4.0% high complexity
14.7% medium
81.3% routine
Industry Payment Transparency
Open Payments through 2024 ↗$4,308
Total received (2018-2024)
Avg $615/year across 7 years
Bottom 40% in CA for interventional cardiology
45
Companies
206
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
$4,296 (99.7%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$12 (0.3%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,140
2023
$782
2022
$899
2021
$407
2020
$251
2019
$455
2018
$373
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Mylan Specialty L.P.
$185
Novo Nordisk Inc
$184
HEARTFLOW, INC.
$120
Boehringer Ingelheim Pharmaceuticals, Inc.
$120
Novartis Pharmaceuticals Corporation
$87
GlaxoSmithKline, LLC.
$78
ABBVIE INC.
$75
PFIZER INC.
$65
Bayer Healthcare Pharmaceuticals Inc.
$63
Otsuka America Pharmaceutical, Inc.
$45
Amgen Inc.
$26
AstraZeneca Pharmaceuticals LP
$21
Philips North America LLC
$20
Lundbeck LLC
$18
RGH Enterprises LLC
$17
Merck Sharp & Dohme LLC
$16
Top 3 companies account for 42.9% of 2024 payments
All-time payments by company (2018-2024) ›
Mylan Specialty L.P.
$540
Novo Nordisk Inc
$351
Amgen Inc.
$334
GlaxoSmithKline, LLC.
$283
Bayer HealthCare Pharmaceuticals Inc.
$239
Boehringer Ingelheim Pharmaceuticals, Inc.
$220
Merck Sharp & Dohme LLC
$208
Otsuka America Pharmaceutical, Inc.
$165
Novartis Pharmaceuticals Corporation
$149
PFIZER INC.
$137
ABBVIE INC.
$130
HEARTFLOW, INC.
$120
Sunovion Pharmaceuticals Inc.
$103
Merck Sharp & Dohme Corporation
$102
Bayer Healthcare Pharmaceuticals Inc.
$100
AbbVie Inc.
$85
Abbott Laboratories
$81
Astellas Pharma US Inc
$74
AstraZeneca Pharmaceuticals LP
$65
Avanir Pharmaceuticals, Inc.
$64
Lilly USA, LLC
$64
Collegium Pharmaceutical, Inc.
$63
E.R. Squibb & Sons, L.L.C.
$54
Radius Health, Inc.
$53
Vanda Pharmaceuticals Inc.
$46
Biohaven Pharmaceutical Holding Company Ltd.
$45
Takeda Pharmaceuticals U.S.A., Inc.
$41
UCB, Inc.
$38
Teva Pharmaceuticals USA, Inc.
$32
Medtronic, Inc.
$30
Philips Electronics North America Corporation
$29
Sumitomo Pharma America, Inc.
$23
Neurocrine Biosciences, Inc.
$22
Dexcom, Inc.
$22
Xeris Pharmaceuticals, Inc.
$21
Philips North America LLC
$20
Janssen Pharmaceuticals, Inc
$20
Allergan Inc.
$19
Baxter Healthcare
$18
ITI, Inc.
$18
Lundbeck LLC
$18
Eisai Inc.
$17
RGH Enterprises LLC
$17
Ironwood Pharmaceuticals, Inc
$15
SANOFI PASTEUR INC.
$12
Top 3 companies account for 28.4% of all-time payments
Associated products mentioned in payments ›
(8874) inCourage · ABILIFY MAINTENA · ANORO ELLIPTA · APTIOM · AREXVY · AUSTEDO · Aimovig · Amitiza · BAQSIMI · BASAGLAR · BELSOMRA · BEVESPI AEROSPHERE · BREZTRI AEROSPHERE · Briviact · CAPLYTA · CHANTIX · Cimzia · DIFICID · Dayvigo · Dexcom G6 Transmitter · ELIQUIS · ENTRESTO · EVENITY · FARXIGA · FFRct · FLUZONE HIGH-DOSE · FREESTYLE LIBRE · FREESTYLE LIBRE 3 · GVOKE PFS · HETLIOZ · Hillrom - Life 2000 Ventilation System · INGREZZA · Infinity DBS Pulse Generators · JANUVIA · JARDIANCE · Kerendia · LEXISCAN · LINZESS · LONHALA MAGNAIR · LYRICA · Lexiscan · MAVYRET · NUEDEXTA · NURTEC ODT · Ozempic · PAXLOVID · PRADAXA · PREVNAR 20 · Perforomist · Prolia · REVEAL LINQ · REXULTI · Repatha · Respiratoriy Care Undiv · Reusable Vest · Rybelsus · SPIRIVA RESPIMAT · STIOLTO RESPIMAT · TRADJENTA · TRELEGY ELLIPTA · Tymlos · VENASEAL · VERQUVO · VESICARE · VRAYLAR · Victoza · XARELTO · XTAMPZA · YUPELRI · Yupelri
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
Interventional cardiologists within 10 mi
15
Per 100K population
5.6
County median income
$109,266
Nearest hospital
WATSONVILLE COMMUNITY 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. Byrne is a clinical cardiology specialist, with above-average Medicare volume (top 9% in CA), with low-engagement industry engagement, with 19 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. Byrne experienced with office visit, established patient (30-39 min)?
Based on Medicare claims data, Dr. Byrne performed 2,391 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. Byrne receive payments from pharmaceutical companies?
Yes. Dr. Byrne received a total of $4,308 from 45 companies across 206 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. Byrne's costs compare to other interventional cardiologists in Watsonville?
Dr. Byrne's average Medicare payment per service is $70. 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. Byrne) 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 →
Explore related providers
Same specialty & city
Interventional Cardiologists in Watsonville
Browse interventional cardiologists in Watsonville ranked by procedure volume and transparency data.
Highest volume
Top Interventional Cardiologists in CA
Interventional cardiologists ranked by total Medicare services performed statewide.
Industry payments
Pharma Payments to Interventional Cardiologists in CA
Which CA interventional cardiologists receive the most from drug and device companies.
By company
Mylan Specialty L.P. Payments to Doctors
See all physicians who received payments from Mylan Specialty L.P.
By company
Novo Nordisk Inc Payments to Doctors
See all physicians who received payments from Novo Nordisk Inc.
By company
Amgen Inc. Payments to Doctors
See all physicians who received payments from Amgen Inc.
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.
Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology