Medicare Enrolled
Dr. Karthik Kumar, MD
Radiation Oncology · Santa Barbara, 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. Kumar 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. Kumar?
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What this data tells you about Dr. Kumar
Dr. Karthik Kumar is a radiation oncology specialist in Santa Barbara, CA, with 17 years of NPI registration. Based on federal Medicare data, Dr. Kumar performed 9,119 Medicare services across 4,531 unique beneficiaries.
Between the years covered by Open Payments, Dr. Kumar received a total of $372 from 3 pharmaceutical and/or device companies across 18 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. Kumar 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.
✓ 17 years in practice
▲ Top 19% volume in CA
$372 industry payments
Medicare Practice Summary
Medicare Utilization ↗9,119
Medicare services
Top 19% in CA for radiation oncology
4,531
Unique beneficiaries
$17
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~536 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. |
3,105 | $0 | $2 |
| Chest X-ray, 1 view An X-ray image of the chest taken from a single angle. This imaging test is used to visualize the structures within the chest cavity. |
1,394 | $7 | $60 |
| MRI contrast dye injection (gadoterate) Administration of gadoterate meglumine, a contrast agent, in a 0.1 ml dose. |
811 | $0 | $2 |
| 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. |
540 | $31 | $260 |
| Gadolinium MRI contrast injection Administration of a gadolinium-based contrast agent to enhance magnetic resonance imaging. The dose is measured per milliliter of the agent injected. |
400 | $1 | $15 |
| 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. |
184 | $67 | $534 |
| Abdominal X-ray, 1 view An X-ray image of the abdomen taken from a single angle to visualize internal structures. |
147 | $7 | $60 |
| 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. |
134 | $27 | $216 |
| 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. |
107 | $17 | $138 |
| CT scan of upper spine, without contrast A CT scan uses X-rays to create detailed images of the upper spine. This procedure is performed without the use of contrast dye. |
105 | $37 | $328 |
| 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. |
101 | $70 | $588 |
| 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. |
92 | $65 | $536 |
| Swallowing function imaging Imaging used to evaluate how well a person can swallow. This procedure visualizes the swallowing process to assess function. |
84 | $21 | $162 |
| 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. |
84 | $23 | $180 |
| CT scan of head blood vessels with contrast A CT scan that uses contrast dye to create detailed images of the blood vessels in the head. |
81 | $69 | $536 |
| 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. |
74 | $40 | $362 |
| Knee X-ray, 1-2 views An X-ray imaging test of the knee joint using one to two different angles to visualize the bones and surrounding structures. |
73 | $7 | $60 |
| 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 | $7 | $62 |
| 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. |
69 | $155 | $2,102 |
| 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. |
65 | $27 | $109 |
| Pelvis X-ray, 1-2 views An X-ray imaging test of the pelvic area using one to two different angles to visualize the bones and joints. |
64 | $7 | $58 |
| 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. |
60 | $156 | $1,771 |
| Knee X-ray, 4 or more views An imaging test using X-rays to create multiple pictures of the knee joint from different angles. |
58 | $9 | $76 |
| 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. |
52 | $7 | $56 |
| 3D screening mammography (tomosynthesis) A screening imaging test of the breast using 3D technology to detect potential abnormalities. |
50 | $58 | $155 |
| Screening mammography An X-ray of the breast used to detect breast cancer in women who have no signs or symptoms of the disease. |
50 | $147 | $456 |
| 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. |
46 | $10 | $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. |
46 | $6 | $56 |
| CT scan of lower spine, without contrast A computed tomography scan that creates detailed images of the lower spine using X-rays without the use of contrast dye. |
37 | $38 | $306 |
| CT scan of chest with contrast A computed tomography scan of the chest using a contrast dye to enhance the visibility of internal structures. |
36 | $45 | $384 |
| Complete ultrasound of abdomen A diagnostic imaging test that uses sound waves to create detailed pictures of the organs and structures within the abdomen. |
36 | $29 | $250 |
| Diagnostic mammography of 1 breast An X-ray examination of one breast to evaluate specific breast symptoms or abnormalities. |
36 | $31 | $250 |
| Rib X-ray, minimum 3 views An X-ray imaging test of the ribs on one side of the body. The procedure includes a minimum of three different views to capture detailed images. |
31 | $10 | $84 |
| Ultrasound of abdomen and pelvis blood flow An ultrasound exam that uses sound waves to visualize and assess blood flow through the arteries and veins in the abdomen and pelvis. |
30 | $30 | $372 |
| 3D radiographic procedure A radiographic imaging technique that creates three-dimensional representations of internal structures. |
28 | $8 | $62 |
| 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. |
27 | $24 | $158 |
| Elbow X-ray, minimum 3 views An X-ray imaging test of the elbow joint that captures at least three different angles to visualize the bones and surrounding structures. |
27 | $6 | $56 |
| 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. |
26 | $291 | $3,762 |
| X-ray of upper arm, minimum of 2 views An X-ray imaging test of the upper arm that captures at least two different views to evaluate the bones and surrounding structures. |
26 | $6 | $56 |
| X-ray of thigh bone, minimum 2 views An X-ray imaging test of the thigh bone using at least two different angles to visualize the bone structure. |
26 | $6 | $62 |
| X-ray of lower leg, 2 views An X-ray imaging test of the lower leg using two different angles to visualize the bones and surrounding structures. |
24 | $6 | $56 |
| CT scan of abdominal and pelvic blood vessels with contrast A computed tomography scan that uses contrast dye to visualize the blood vessels in the abdomen and pelvis. |
24 | $87 | $672 |
| Complete pelvic ultrasound An imaging test using sound waves to create pictures of the organs and structures within the pelvis. |
24 | $24 | $212 |
| 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. |
22 | $130 | $1,745 |
| X-ray of both hips, 2 views An X-ray imaging test that captures two views of both hip joints to evaluate bone structure and alignment. |
22 | $7 | $76 |
| MRI of head blood vessels without contrast An MRI scan that creates detailed images of the blood vessels in the head without using contrast dye. |
21 | $48 | $368 |
| X-ray of upper spine, 2-3 views An X-ray imaging test of the upper spine using two to three different angles to visualize the bones and structures. |
21 | $8 | $74 |
| 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. |
19 | $41 | $154 |
| Ankle X-ray, minimum 3 views An X-ray imaging test of the ankle that captures at least three different angles to evaluate the bones and joints. |
19 | $24 | $137 |
| 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. |
19 | $27 | $145 |
| X-ray of middle spine, 2 views An X-ray imaging test that produces two views of the middle section of the spine to visualize the bones and joints. |
18 | $8 | $70 |
| X-ray of forearm, 2 views An X-ray imaging test of the forearm using two different angles to visualize the bones and surrounding structures. |
17 | $6 | $54 |
| Digital breast tomosynthesis (3D mammogram) A specialized imaging test that creates three-dimensional pictures of the breast tissue to help detect abnormalities. |
17 | $44 | $228 |
| 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. |
16 | $10 | $100 |
| X-ray of lower and sacral spine, 2-3 views An X-ray imaging test that captures 2 to 3 views of the lower back and sacral spine to visualize the bones and joints in this area. |
16 | $30 | $193 |
| CT scan of leg, without contrast A computed tomography scan of the leg performed without the use of contrast dye. This imaging test uses X-rays to create detailed cross-sectional images of the leg's internal structures. |
16 | $37 | $308 |
| 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. |
15 | $113 | $914 |
| X-ray of lower and sacral spine, minimum 6 views An X-ray imaging test that captures at least six views of the lower back and sacral spine to evaluate bone structure and alignment. |
15 | $12 | $106 |
| X-ray of foot, 2 views An X-ray imaging test of the foot using two different angles to create pictures of the bones and joints. |
15 | $6 | $48 |
| Esophagram with single contrast An X-ray of the esophagus using a single type of contrast material to visualize the structure and function of the upper digestive tract. |
15 | $24 | $144 |
| Limited ultrasound of 1 breast A focused ultrasound examination of a single breast to evaluate specific areas of concern. |
15 | $81 | $214 |
| 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. |
15 | $25 | $216 |
| MRI of middle spinal canal, without contrast This procedure uses magnetic resonance imaging to create detailed pictures of the middle section of the spinal canal. It is performed without the use of contrast dye. |
14 | $127 | $1,864 |
| Wrist X-ray, 2 views An X-ray imaging test of the wrist using two different angles to visualize the bones and joints. |
14 | $7 | $58 |
| MRI of abdomen without contrast An MRI scan of the abdomen that uses magnetic fields and radio waves to create detailed images of internal organs and tissues without the use of contrast dye. |
14 | $58 | $446 |
| 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. |
13 | $122 | $1,264 |
| X-ray of shoulder, 1 view An X-ray image of the shoulder joint taken from a single angle. This imaging test is used to visualize the bones and surrounding structures of the shoulder. |
13 | $6 | $48 |
| 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. |
13 | $291 | $1,390 |
| Radiologist review of bile or pancreatic duct image during surgery A radiologist reviews images of the bile and/or pancreatic ducts while the patient is undergoing surgery. |
13 | $11 | $112 |
| Complete ultrasound of retroperitoneum An ultrasound examination of the structures located behind the abdominal cavity. |
13 | $92 | $562 |
| 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. |
12 | $9 | $68 |
| X-ray of ankle, 2 views An X-ray imaging test of the ankle using two different angles to visualize the bones and joints. |
12 | $7 | $54 |
| 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. |
12 | $327 | $1,727 |
| 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. |
12 | $94 | $413 |
| Ultrasound scan of chest An imaging test that uses sound waves to create pictures of the structures inside the chest. |
12 | $23 | $170 |
| Diagnostic mammography of both breasts | 12 | $144 | $511 |
| 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. |
12 | $161 | $604 |
| Ultrasound of leg arteries or grafts An ultrasound exam that uses sound waves to create images of the arteries in one leg or any grafts present in that leg. |
11 | $19 | $152 |
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.
0.1% high complexity
70.2% medium
29.7% routine
Industry Payment Transparency
Open Payments through 2022 ↗$372
Total received (2018-2022)
Avg $93/year across 4 years
Top 37% in CA for radiation oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
3
Companies
18
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
$372 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2022
$145
2021
$191
2020
$19
2018
$18
Payments by company (2022)
Consulting
Speaking
Meals & Travel
Research
Chiesi USA, Inc.
$145
Top 3 companies account for 100.0% of 2022 payments
All-time payments by company (2018-2022) ›
Chiesi USA, Inc.
$335
Siemens Medical Solutions USA, Inc.
$19
AstraZeneca Pharmaceuticals LP
$18
Top 3 companies account for 100.0% of all-time payments
Associated products mentioned in payments ›
BRILINTA · KENGREAL · MAGNETOM Sola
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
Radiation oncologists within 10 mi
67
Per 100K population
15.1
County median income
$95,977
Nearest hospital
SANTA BARBARA COTTAGE 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 2022 |
| 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. Kumar is a mixed practice specialist, with above-average Medicare volume (top 19% in CA), with low-engagement industry engagement, with 17 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. Kumar experienced with contrast dye for imaging (iodine-based)?
Based on Medicare claims data, Dr. Kumar performed 3,105 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. Kumar receive payments from pharmaceutical companies?
Yes. Dr. Kumar received a total of $372 from 3 companies across 18 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. Kumar's costs compare to other radiation oncologists in Santa Barbara?
Dr. Kumar's average Medicare payment per service is $17. 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. Kumar) 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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