Medicare Enrolled
Dr. William King, M.D.
Radiation Oncology · Oxnard, 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. King 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 →
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What this data tells you about Dr. King
Dr. William King is a radiation oncology specialist in Oxnard, CA, with 16 years of NPI registration. Based on federal Medicare data, Dr. King performed 5,915 Medicare services across 2,080 unique beneficiaries.
Between the years covered by Open Payments, Dr. King received a total of $2,925 from 21 pharmaceutical and/or device companies across 35 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in radiation oncology. 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. King 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.
✓ 16 years in practice
▲ Top 27% volume in CA
$2,925 industry payments
Medicare Practice Summary
Medicare Utilization ↗5,915
Medicare services
Top 27% in CA for radiation oncology
2,080
Unique beneficiaries
$155
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~370 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. |
3,502 | $0 | $2 |
| Piflufolastat F-18 diagnostic injection A diagnostic injection of the radioactive tracer piflufolastat F-18 used for imaging. The dose specified is 1 millicurie. |
415 | $489 | $750 |
| Nuclear medicine scan from skull base to mid-thigh with CT A nuclear medicine imaging study covering the area from the base of the skull to the middle of the thighs, performed alongside a CT scan. |
293 | $1,468 | $4,170 |
| Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries | 266 | $281 | $450 |
| Limited retroperitoneal ultrasound A focused ultrasound exam of the area behind the abdominal cavity to evaluate specific structures. |
178 | $50 | $255 |
| CT scan of face, without contrast A computed tomography scan that creates detailed images of the facial structures. This procedure is performed without the use of intravenous contrast dye. |
140 | $117 | $612 |
| Complete ultrasound of abdomen A diagnostic imaging test that uses sound waves to create detailed pictures of the organs and structures within the abdomen. |
100 | $99 | $338 |
| 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. |
91 | $101 | $266 |
| 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. |
90 | $118 | $731 |
| 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. |
85 | $163 | $464 |
| Complete pelvic ultrasound An imaging test using sound waves to create pictures of the organs and structures within the pelvis. |
79 | $93 | $291 |
| MRI contrast dye injection (gadoterate) Administration of gadoterate meglumine, a contrast agent, in a 0.1 ml dose. |
72 | $0 | $61 |
| 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. |
64 | $72 | $253 |
| Complete ultrasound of retroperitoneum An ultrasound examination of the structures located behind the abdominal cavity. |
63 | $96 | $353 |
| 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. |
59 | $320 | $1,060 |
| Transvaginal pelvic ultrasound An ultrasound exam using a probe inserted into the vagina to image the uterus, ovaries, fallopian tubes, cervix, and surrounding pelvic structures. |
57 | $101 | $224 |
| 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. |
48 | $169 | $511 |
| 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. |
43 | $213 | $397 |
| CT scan of chest with contrast A computed tomography scan of the chest using a contrast dye to enhance the visibility of internal structures. |
39 | $121 | $857 |
| CT scan of abdomen and pelvis with contrast A CT scan that uses dye to create detailed images of the abdomen and pelvis. This imaging test helps doctors examine internal organs and structures in these areas. |
37 | $285 | $819 |
| 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. |
35 | $108 | $301 |
| Whole body nuclear medicine scan with CT A combined imaging procedure using nuclear medicine and CT scans to visualize the entire body. |
29 | $1,461 | $4,176 |
| 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. |
28 | $169 | $472 |
| CT scan of heart blood vessels and grafts with contrast A CT scan that uses contrast dye to create detailed images of the heart's blood vessels and any surgical grafts. |
25 | $256 | $800 |
| Liver stiffness measurement A non-invasive test that uses ultrasound or similar technology to measure the stiffness of liver tissue. This measurement helps assess the degree of liver fibrosis or scarring. |
25 | $25 | $95 |
| Limited ultrasound of joint or extremity A focused ultrasound exam of a specific joint or other structure in the arm or leg, excluding blood vessels. |
18 | $33 | $296 |
| MRI of brain with and without contrast An MRI scan of the brain using contrast dye both before and after administration to provide detailed images of brain structures. |
12 | $283 | $2,770 |
| CT scan of neck blood vessels with contrast A computed tomography scan that uses dye to visualize the blood vessels in the neck. This imaging test helps examine the structure and flow within the neck's vascular system. |
11 | $188 | $1,275 |
| 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. |
11 | $42 | $204 |
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 ↗$2,925
Total received (2018-2024)
Avg $585/year across 5 years
Top 15% in CA for radiation oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
21
Companies
35
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
$2,727 (93.2%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$198 (6.8%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$32
2022
$238
2020
$141
2019
$1,082
2018
$1,431
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Napo Pharmaceuticals Inc
$32
Top 3 companies account for 100.0% of 2024 payments
All-time payments by company (2018-2024) ›
AstraZeneca Pharmaceuticals LP
$610
Genentech USA, Inc.
$425
Merck Sharp & Dohme Corporation
$298
GENZYME CORPORATION
$232
TESARO, Inc.
$227
Janssen Products, LP
$198
PFIZER INC.
$125
Celgene Corporation
$123
Seattle Genetics, Inc.
$123
Takeda Pharmaceuticals U.S.A., Inc.
$121
Clovis Oncology, Inc.
$100
Daiichi Sankyo Inc.
$95
Foundation Medicine, Inc.
$57
Napo Pharmaceuticals Inc
$32
Smith & Nephew, Inc.
$29
Novartis Pharmaceuticals Corporation
$25
E.R. Squibb & Sons, L.L.C.
$24
Bayer HealthCare Pharmaceuticals Inc.
$22
Amgen Inc.
$20
Lilly USA, LLC
$19
Janssen Biotech, Inc.
$18
Top 3 companies account for 45.6% of all-time payments
Associated products mentioned in payments ›
ADCETRIS · Avastin · CALQUENCE · ENTRESTO · FOUNDATIONONE · GAZYVA · IMFINZI · INJECTAFER · JARDIANCE · JEVTANA · KEYTRUDA · Kerendia · LIBTAYO · LYNPARZA · Mytesi · Perjeta · Revlimid · Rituxan · Rubraca · SYMTUZA · Santyl · TAGRISSO · XTANDI · ZEJULA
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 (93%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Radiation oncologists within 10 mi
35
Per 100K population
4.2
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. King is a mixed practice specialist, with above-average Medicare volume (top 27% in CA), with low-engagement industry engagement in the top 15% of CA peers, with 16 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. King experienced with contrast dye for imaging (iodine-based)?
Based on Medicare claims data, Dr. King performed 3,502 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. King receive payments from pharmaceutical companies?
Yes. Dr. King received a total of $2,925 from 21 companies across 35 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. King's costs compare to other radiation oncologists in Oxnard?
Dr. King's average Medicare payment per service is $155. 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. King) 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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