Medicare Enrolled
Dr. Joan Woo, M.D.
Cardiovascular Disease · Seattle, WA
Practice pattern: Cardiac & Cardiac
— Practice combining cardiac and cardiac services
Consulting-driven
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. Woo 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. Woo?
Request a correction or review of any data shown here. Provider portal →
What this data tells you about Dr. Woo
Dr. Joan Woo is a cardiovascular disease specialist in Seattle, WA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Woo performed 2,125 Medicare services across 1,771 unique beneficiaries.
Between the years covered by Open Payments, Dr. Woo received a total of $4,628 from 7 pharmaceutical and/or device companies across 16 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in cardiovascular disease. The majority of payments are for consulting, which typically reflects recognized clinical expertise sought by manufacturers. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Woo 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 in practice
▲ Top 29% volume in WA
$4,628 industry payments
Medicare Practice Summary
Medicare Utilization ↗2,125
Medicare services
Top 29% in WA for cardiovascular disease
1,771
Unique beneficiaries
$72
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~106 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, 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. |
291 | $138 | $462 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
211 | $108 | $1,290 |
| 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. |
206 | $99 | $330 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
202 | $8 | $22 |
| 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. |
156 | $7 | $23 |
| Follow-up ultrasound of heart blood flow, valves and chambers An ultrasound exam that follows up on the heart's blood flow, valves, and chambers. It uses sound waves to create images of the heart's structure and function. |
111 | $13 | $175 |
| Echocardiogram with color Doppler An ultrasound of the heart that uses color imaging to visualize blood flow, measure flow rate, and assess valve function. |
110 | $12 | $442 |
| Critical care, first 30-74 min Emergency medical care for a critically ill or injured patient lasting between 30 and 74 minutes. This service involves direct patient care and medical decision making to stabilize the patient. |
91 | $182 | $783 |
| Stress echocardiogram An ultrasound of the heart performed while at rest and during exercise or drug-induced stress to evaluate heart function under different conditions. |
78 | $71 | $820 |
| 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. |
61 | $103 | $313 |
| Routine 12-lead electrocardiogram (ECG) A test that records the electrical activity of the heart using at least 12 leads to produce a tracing. |
55 | $5 | $289 |
| Continuous EKG monitoring review, 48-7 days Review and interpretation of continuous external EKG recordings lasting more than 48 hours up to 7 days. |
54 | $17 | $67 |
| Anticoagulant management for warfarin Management of anticoagulant therapy for a patient taking warfarin. This service involves monitoring and adjusting the medication regimen. |
43 | $7 | $32 |
| 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. |
41 | $63 | $210 |
| External shock to heart to regulate heart beat A procedure that delivers an electric shock to the heart from outside the body to restore a normal heart rhythm. |
40 | $88 | $478 |
| Follow-up heart ultrasound An ultrasound of the heart performed to monitor or reassess a previously identified condition or treatment progress. |
40 | $21 | $69 |
| Transesophageal echocardiogram An ultrasound of the heart performed using a probe inserted into the esophagus to obtain detailed images of heart structures and function. |
33 | $85 | $295 |
| Office visit for established patient An office visit for an existing patient that may not require the healthcare professional to be present. |
32 | $6 | $160 |
| Stress echocardiogram with ECG monitoring An ultrasound of the heart performed while monitoring heart rhythm during rest, exercise, or medication-induced stress, followed by a review and report of the findings. |
27 | $204 | $2,511 |
| New patient office visit, complex (60-74 min) | 25 | $193 | $565 |
| Additional 30 minutes of critical care This code represents an additional 30 minutes of critical care services provided beyond the initial critical care time period. |
24 | $91 | $400 |
| Heart muscle strain imaging | 22 | $34 | $115 |
| 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. |
22 | $144 | $428 |
| 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. |
22 | $109 | $364 |
| Exercise or drug-induced heart stress test with ECG A heart stress test performed using exercise or medication while monitoring the electrocardiogram, with physician review of the results. |
18 | $11 | $40 |
| 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. |
18 | $150 | $514 |
| Exercise or drug-induced heart stress test with ECG A heart stress test performed using exercise or medication while an electrocardiogram is monitored under physician supervision. |
17 | $17 | $60 |
| Exercise or drug-induced heart stress test with ECG A test that monitors the heart's electrical activity while the patient exercises or receives medication to increase heart rate. |
17 | $24 | $947 |
| 2-day continuous ECG with professional review A two-day continuous electrocardiogram recording that includes a review by a healthcare professional. |
17 | $14 | $63 |
| External EKG monitoring, 8-15 days Continuous external electrocardiogram recording and review over a period of 8 to 15 days to monitor heart rhythm. |
15 | $22 | $74 |
| Pacemaker programming, single lead Adjustment and testing of a single-lead pacemaker to ensure it functions correctly. |
15 | $34 | $142 |
| Ultrasound of heart with contrast injection An ultrasound of the heart is performed while injecting an X-ray contrast agent to improve the clarity of the images. |
11 | $32 | $102 |
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.
15.9% high complexity
17.6% medium
66.6% routine
Industry Payment Transparency
Open Payments through 2024 ↗$4,628
Total received (2018-2024)
Avg $926/year across 5 years
Top 21% in WA for cardiovascular disease
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
7
Companies
16
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.
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$2,420 (52.3%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$1,700 (36.7%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$508 (11.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,168
2023
$1,995
2022
$43
2019
$1,400
2018
$22
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Siemens Medical Solutions USA, Inc.
$1,020
iRhythm Technologies, Inc.
$77
Merck Sharp & Dohme LLC
$32
Abbott Laboratories
$25
SCPHARMACEUTICALS INC.
$14
Top 3 companies account for 96.7% of 2024 payments
All-time payments by company (2018-2024) ›
Siemens Medical Solutions USA, Inc.
$4,120
ABIOMED
$206
Merck Sharp & Dohme LLC
$104
Abbott Laboratories
$85
iRhythm Technologies, Inc.
$77
CVRx, Inc.
$22
SCPHARMACEUTICALS INC.
$14
Top 3 companies account for 95.7% of all-time payments
Associated products mentioned in payments ›
ACUSON Origin Diagnostic Ultrasound System · ACUSON Sequoia Diagnostic Ultrasound System · Barostim Neo System · CARDIOMEMS · FUROSCIX · Impella · MITRACLIP · Sequoia · VERQUVO · ZIO XT Patch · Zio monitor
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 →
The majority of payments (52%) are consulting fees, which typically reflect recognized clinical expertise sought by manufacturers.
Geographic Context
Cardiologists within 10 mi
250
Per 100K population
11.0
County median income
$122,148
Nearest hospital
VIRGINIA MASON MEDICAL CENTER
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. Woo is a cardiac & cardiac specialist, with above-average Medicare volume (top 29% in WA), with consulting-driven 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
Is Dr. Woo experienced with office visit, established patient, complex (40-54 min)?
Based on Medicare claims data, Dr. Woo performed 291 office visit, established patient, complex (40-54 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. Woo receive payments from pharmaceutical companies?
Yes. Dr. Woo received a total of $4,628 from 7 companies across 16 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. Woo's costs compare to other cardiologists in Seattle?
Dr. Woo's average Medicare payment per service is $72. 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. Woo) 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
Cardiologists in Seattle
Browse cardiologists in Seattle ranked by procedure volume and transparency data.
Highest volume
Top Cardiologists in WA
Cardiologists ranked by total Medicare services performed statewide.
Industry payments
Pharma Payments to Cardiologists in WA
Which WA cardiologists receive the most from drug and device companies.
By company
Siemens Medical Solutions USA, Inc. Payments to Doctors
See all physicians who received payments from Siemens Medical Solutions USA, Inc.
By company
ABIOMED Payments to Doctors
See all physicians who received payments from ABIOMED.
By company
Merck Sharp & Dohme LLC Payments to Doctors
See all physicians who received payments from Merck Sharp & Dohme LLC.
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