Medicare Enrolled
Dr. Yih Kok, M.D.
Cardiovascular Disease · San Gabriel, CA
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
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. Kok 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. Kok?
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What this data tells you about Dr. Kok
Dr. Yih Kok is a cardiovascular disease specialist in San Gabriel, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Kok performed 37,223 Medicare services across 6,195 unique beneficiaries.
Between the years covered by Open Payments, Dr. Kok received a total of $3,402 from 19 pharmaceutical and/or device companies across 72 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in cardiovascular disease. 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. Kok 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 0% volume in CA
$3,402 industry payments
Medicare Practice Summary
Medicare Utilization ↗37,223
Medicare services
Top 0% in CA for cardiovascular disease
6,195
Unique beneficiaries
$14
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~1,861 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 |
|---|---|---|---|
| Contrast dye for imaging (iodine-based) A contrast agent containing 300-399 mg/ml of iodine used to enhance imaging studies. It is administered per milliliter to improve the visibility of internal structures. |
17,170 | $0 | $0 |
| Adenosine injection, 1 mg Administration of a 1 mg dose of adenosine medication. This code is specifically for adenosine and excludes adenosine phosphate compounds. |
13,546 | $0 | $4 |
| 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. |
1,024 | $65 | $105 |
| 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. |
829 | $11 | $55 |
| Chest X-ray, 2 views An X-ray imaging test of the chest that captures two different angles to visualize the lungs, heart, and chest wall. |
743 | $17 | $60 |
| 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. |
442 | $51 | $240 |
| Technetium Tc-99m tetrofosmin diagnostic injection A diagnostic injection of Technetium Tc-99m tetrofosmin used for imaging studies. |
432 | $76 | $348 |
| 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. |
430 | $400 | $1,000 |
| Gadoteridol injection (ProHance) Injection of gadoteridol, a contrast agent used to enhance imaging results. |
255 | $1 | $8 |
| Complete ultrasound of abdomen A diagnostic imaging test that uses sound waves to create detailed pictures of the organs and structures within the abdomen. |
243 | $54 | $201 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
158 | $152 | $561 |
| CT scan of chest, without contrast A computed tomography scan of the chest area that uses X-rays to create detailed images without the use of contrast dye. |
107 | $64 | $550 |
| 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. |
105 | $100 | $175 |
| 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. |
87 | $94 | $150 |
| X-ray of lower and sacral spine, minimum of 4 views An X-ray imaging test of the lower back and sacrum using at least four different angles to visualize the bones and joints. |
81 | $26 | $80 |
| CT scan of chest blood vessels with contrast A CT scan that uses contrast dye to create detailed images of the blood vessels in the chest. |
73 | $145 | $1,120 |
| Knee X-ray, 3 views An X-ray imaging test of the knee joint that captures three different angles to evaluate the bones and surrounding structures. |
70 | $23 | $55 |
| Cardiac catheterization | 70 | $208 | $1,100 |
| CT scan of head/brain, without contrast A CT scan uses X-rays to create detailed images of the head or brain without the use of contrast dye. |
67 | $52 | $450 |
| 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. |
61 | $128 | $501 |
| Limited retroperitoneal ultrasound A focused ultrasound exam of the area behind the abdominal cavity to evaluate specific structures. |
58 | $25 | $130 |
| CT scan of abdomen and pelvis with contrast A CT scan of the abdomen and pelvis using contrast dye before and after administration to visualize internal structures. |
55 | $236 | $700 |
| Regadenoson injection (Lexiscan) for heart stress test An injection of regadenoson, a medication used to stress the heart during diagnostic testing. |
53 | $37 | $400 |
| Limited ultrasound of pelvis A focused ultrasound exam of the pelvic area to evaluate specific structures. This procedure provides images of the pelvis to assist in medical assessment. |
51 | $19 | $141 |
| CT scan of abdomen and pelvis, without contrast A computed tomography scan that creates detailed images of the abdominal and pelvic organs. The procedure is performed without the use of intravenous contrast dye. |
49 | $85 | $520 |
| Ultrasound of head and neck soft tissue This procedure uses sound waves to create images of the soft tissues in the head and neck area. It allows for the visualization of structures beneath the skin without using radiation. |
49 | $58 | $140 |
| 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. |
48 | $134 | $475 |
| 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. |
48 | $141 | $300 |
| CT scan of chest with and without contrast A computed tomography scan of the chest performed using both intravenous contrast dye and without it to provide detailed images of internal structures. |
47 | $111 | $800 |
| 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. |
46 | $178 | $600 |
| Continuous external EKG monitoring, 8-15 days This procedure involves recording heart rhythm continuously using an external EKG device over a period of 8 to 15 days. |
44 | $11 | $40 |
| External EKG monitoring, 8-15 days Continuous external electrocardiogram recording and review over a period of 8 to 15 days to monitor heart rhythm. |
44 | $22 | $60 |
| MRI scan of brain, without contrast A magnetic resonance imaging test of the brain that does not use contrast dye. This procedure creates detailed images of the brain's structure using magnetic fields and radio waves. |
43 | $107 | $1,050 |
| 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. |
40 | $84 | $180 |
| 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. |
40 | $65 | $95 |
| MRI of lower spine, without contrast A magnetic resonance imaging scan of the lower spinal canal that does not use contrast dye to create detailed images of the spine. |
37 | $107 | $1,140 |
| 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. |
33 | $55 | $233 |
| Abdominal X-ray, 1 view An X-ray image of the abdomen taken from a single angle to visualize internal structures. |
29 | $15 | $50 |
| Shoulder X-ray, 2+ views An X-ray imaging test of the shoulder joint using at least two different angles to visualize the bones and surrounding structures. |
26 | $18 | $56 |
| X-ray of upper spine, 4-5 views An X-ray imaging test of the upper spine using 4 to 5 different views to visualize the bones and structures in that area. |
23 | $34 | $82 |
| Pacemaker programming, dual lead system Adjustment and configuration of a dual-lead pacemaker device to ensure proper operation and settings. |
22 | $68 | $150 |
| MRI of leg joint, without contrast A magnetic resonance imaging scan of a joint in the leg performed without the use of contrast dye. |
21 | $105 | $1,015 |
| Limited abdominal ultrasound A focused ultrasound examination of the abdomen to evaluate specific organs or areas. This procedure uses sound waves to create images of internal structures. |
21 | $48 | $130 |
| MRI of upper spine without contrast An MRI scan of the upper spinal canal that does not use contrast dye. This imaging test uses magnetic fields and radio waves to create detailed pictures of the spine. |
20 | $96 | $1,025 |
| Complete ultrasound of retroperitoneum An ultrasound examination of the structures located behind the abdominal cavity. |
18 | $66 | $200 |
| Hip X-ray, 2-3 views An X-ray imaging test of the hip joint using two to three different angles to visualize the bones and surrounding structures. |
17 | $28 | $75 |
| Insertion of tube in right and left heart chambers and coronary artery for diagnosis with review by radiologist | 17 | $294 | $840 |
| X-ray of hand, minimum of 3 views An X-ray imaging test of the hand that captures at least three different angles to visualize the bones and joints. |
16 | $24 | $50 |
| Foot X-ray, 3+ views An X-ray imaging test of the foot that captures at least three different views to evaluate the bones and joints. |
16 | $22 | $50 |
| MRI of abdomen with and without contrast An MRI scan of the abdomen using contrast dye before and after administration to create detailed images of internal structures. |
16 | $241 | $2,237 |
| X-ray of middle spine, 3 views An X-ray imaging test that captures three different views of the middle section of the spine to evaluate its structure. |
15 | $16 | $65 |
| CT scan of abdomen without contrast A computed tomography scan that creates detailed images of the abdominal organs and structures. This procedure is performed without the use of intravenous contrast dye. |
15 | $55 | $520 |
| CT scan of abdomen with and without contrast A CT scan of the abdomen performed both before and after the administration of contrast dye to provide detailed images of internal structures. |
15 | $131 | $822 |
| X-ray of sacrum and tailbone, minimum of 2 views An X-ray imaging test of the sacrum and tailbone using at least two different angles to visualize the bones. |
14 | $20 | $50 |
| Complete pelvic ultrasound An imaging test using sound waves to create pictures of the organs and structures within the pelvis. |
14 | $55 | $140 |
| 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. |
14 | $18 | $100 |
| 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. |
14 | $12 | $100 |
| Wrist X-ray, minimum 3 views An imaging test using X-rays to capture at least three different angles of the wrist bones and joints. |
13 | $21 | $62 |
| Removal and replacement of dual lead permanent pacemaker This procedure involves removing an existing permanent pacemaker with two leads and replacing it with a new device. It is performed to update or repair the heart rhythm management system. |
12 | $291 | $700 |
| Echocardiogram, transthoracic An ultrasound test that uses sound waves to create images of the heart's blood flow, valves, and chambers. |
12 | $46 | $150 |
| Echocardiogram with color Doppler An ultrasound of the heart that uses color imaging to visualize blood flow, measure flow rate, and assess valve function. |
12 | $22 | $150 |
| 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. |
11 | $7 | $15 |
| 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. |
11 | $194 | $475 |
| 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. |
11 | $177 | $400 |
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.
0.7% high complexity
90.1% medium
9.1% routine
Industry Payment Transparency
Open Payments through 2024 ↗$3,402
Total received (2018-2024)
Avg $567/year across 6 years
Top 49% in CA for cardiovascular disease
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
19
Companies
72
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
$3,388 (99.6%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$14 (0.4%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$800
2023
$501
2022
$291
2021
$241
2019
$109
2018
$1,460
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Medtronic, Inc.
$213
E.R. Squibb & Sons, L.L.C.
$141
Actelion Pharmaceuticals US, Inc.
$125
INTUITIVE SURGICAL, INC.
$88
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$76
Abbott Laboratories
$52
CORDIS US CORP.
$23
ABIOMED
$22
Kestra Medical Technology Services, Inc.
$21
Philips North America LLC
$19
Boehringer Ingelheim Pharmaceuticals, Inc.
$18
Top 3 companies account for 60.0% of 2024 payments
All-time payments by company (2018-2024) ›
Abbott Laboratories
$1,245
Medtronic, Inc.
$819
Edwards Lifesciences Corporation
$258
Boston Scientific Corporation
$233
Philips Electronics North America Corporation
$147
E.R. Squibb & Sons, L.L.C.
$141
Actelion Pharmaceuticals US, Inc.
$125
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$118
INTUITIVE SURGICAL, INC.
$88
Cardiovascular Systems Inc.
$43
Radius Health, Inc.
$33
CORDIS US CORP.
$23
ABIOMED
$22
Kestra Medical Technology Services, Inc.
$21
Philips North America LLC
$19
Boehringer Ingelheim Pharmaceuticals, Inc.
$18
ACIST MEDICAL SYSTEMS, INC.
$18
Medtronic Vascular, Inc.
$16
SANOFI-AVENTIS U.S. LLC
$14
Top 3 companies account for 68.3% of all-time payments
Associated products mentioned in payments ›
(5154) Azurion 7 M20 GC · 3F · Asahi Fielder coronary guide wire · Assure WCD · CAMZYOS · COREVALVE EVOLUT R · CoreValve Evolut · Coronary Orbital Atherectomy System · DIAMONDBACK CORONARY · DRAGONFLY OPSTAR · Da Vinci Surgical System · Diamondback Coronary · Diamondback Peripheral · EUPHORA · Edwards SAPIEN 3 Transcatheter Heart Valve · HD-IVUS · IGT D Coronary · Impella · JARDIANCE · LINQ II · LUX-Dx Insertable Cardiac Monitor · LifeVest · MULTAQ · MYNXGRIP · Micra · MitraClip System · NC TREK NEO · ONYX FRONTIER · PRESSUREWIRE · RESOLUTE ONYX · Reveal LINQ · SYMPLICITY G3 · Tymlos · UPTRAVI · WATCHMAN
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
Cardiologists within 10 mi
643
Per 100K population
6.5
County median income
$87,760
Nearest hospital
SAN GABRIEL VALLEY 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. Kok is a mixed practice specialist, with above-average Medicare volume (top 0% in CA), 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
Is Dr. Kok experienced with contrast dye for imaging (iodine-based)?
Based on Medicare claims data, Dr. Kok performed 17,170 contrast dye for imaging (iodine-based) 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. Kok receive payments from pharmaceutical companies?
Yes. Dr. Kok received a total of $3,402 from 19 companies across 72 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. Kok's costs compare to other cardiologists in San Gabriel?
Dr. Kok's average Medicare payment per service is $14. 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. Kok) 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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