Medicare Enrolled
Dr. Tanya Tivorsak, M.D.
Radiation Oncology · West Hollywood, 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. Tivorsak 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. Tivorsak?
Request a correction or review of any data shown here. Provider portal →
What this data tells you about Dr. Tivorsak
Dr. Tanya Tivorsak is a radiation oncology specialist in West Hollywood, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Tivorsak performed 3,781 Medicare services across 3,220 unique beneficiaries.
Between the years covered by Open Payments, Dr. Tivorsak received a total of $140 from 5 pharmaceutical and/or device companies across 5 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. Tivorsak 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 38% volume in CA
$140 industry payments
Medicare Practice Summary
Medicare Utilization ↗3,781
Medicare services
Top 38% in CA for radiation oncology
3,220
Unique beneficiaries
$17
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~199 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 |
|---|---|---|---|
| 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. |
284 | $6 | $79 |
| 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. |
263 | $7 | $68 |
| 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. |
244 | $7 | $82 |
| 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. |
219 | $7 | $81 |
| 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. |
217 | $7 | $86 |
| MRI of leg joint, without contrast A magnetic resonance imaging scan of a joint in the leg performed without the use of contrast dye. |
204 | $51 | $446 |
| 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. |
181 | $9 | $101 |
| 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. |
177 | $7 | $79 |
| 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. |
152 | $38 | $601 |
| 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. |
139 | $6 | $79 |
| Knee X-ray, 4 or more views An imaging test using X-rays to create multiple pictures of the knee joint from different angles. |
123 | $9 | $103 |
| 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. |
114 | $7 | $87 |
| MRI of arm joint, without contrast An MRI scan uses magnetic fields and radio waves to create detailed images of the arm joint. This specific procedure is performed without the use of a contrast dye. |
105 | $52 | $385 |
| MRI of leg, without contrast A magnetic resonance imaging scan of the leg performed without the use of contrast dye to visualize internal structures. |
100 | $53 | $268 |
| 3D radiographic procedure with computerized image postprocessing A radiographic imaging procedure that creates three-dimensional images using computerized processing of the captured data. |
100 | $31 | $55 |
| 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. |
84 | $7 | $79 |
| 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. |
80 | $7 | $78 |
| 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. |
59 | $7 | $79 |
| X-ray of ankle, 2 views An X-ray imaging test of the ankle using two different angles to visualize the bones and joints. |
58 | $6 | $75 |
| 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. |
55 | $7 | $78 |
| 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. |
54 | $6 | $75 |
| 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. |
53 | $9 | $101 |
| Joint injection, major joint Removal of fluid from a large joint and/or injection of medication into the joint space. |
51 | $34 | $368 |
| 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. |
51 | $7 | $77 |
| Fluoroscopic guidance for needle placement Use of real-time X-ray imaging to guide the precise placement of a needle during a medical procedure. |
47 | $21 | $240 |
| CT scan of arm, without contrast A CT scan of the arm that uses X-rays to create detailed images of the arm's internal structures without the use of contrast dye. |
42 | $39 | $598 |
| CT scan of pelvis, without contrast A CT scan that uses X-rays to create detailed images of the pelvic area without the use of contrast dye. |
40 | $43 | $597 |
| Pelvis X-ray, minimum 3 views An X-ray imaging test of the pelvic area that captures at least three different views to evaluate the bones and joints. |
38 | $10 | $97 |
| Radiologist review of CT-guided needle placement A radiologist reviews the CT imaging used to guide the placement of a needle. |
38 | $59 | $677 |
| X-ray of thigh bone, 1 view An X-ray image of the thigh bone (femur) taken from a single angle to visualize the bone structure. |
33 | $7 | $76 |
| 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. |
32 | $27 | $125 |
| 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. |
28 | $7 | $76 |
| MRI of pelvis, without contrast A magnetic resonance imaging scan of the pelvic area performed without the use of contrast dye. |
23 | $53 | $279 |
| X-ray of collar bone An X-ray image of the collar bone (clavicle) to evaluate its structure and alignment. |
23 | $7 | $75 |
| Elbow X-ray, 2 views An X-ray imaging test of the elbow joint using two different angles to visualize the bones and surrounding structures. |
23 | $7 | $69 |
| MRI of arm without contrast An MRI scan of the arm that uses magnetic fields and radio waves to create detailed images of internal structures without the use of contrast dye. |
23 | $51 | $249 |
| Abdominal X-ray, 1 view An X-ray image of the abdomen taken from a single angle to visualize internal structures. |
21 | $7 | $82 |
| Ultrasound-guided large joint aspiration or injection This procedure uses ultrasound imaging to guide the removal of fluid from or the injection of medication into a large joint. |
20 | $46 | $275 |
| CT scan of leg with contrast A CT scan of the leg using contrast material to enhance the visibility of internal structures. |
19 | $46 | $593 |
| 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. |
18 | $8 | $101 |
| X-ray of both hips, 3-4 views An X-ray imaging test that captures 3 to 4 views of both hip joints to visualize the bones and surrounding structures. |
18 | $11 | $129 |
| 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. |
17 | $7 | $79 |
| MRI of leg with and without contrast An MRI scan of the leg performed both before and after the administration of a contrast dye to enhance image detail. |
15 | $80 | $605 |
| MRI of leg joint with and without contrast An MRI scan of a leg joint performed both before and after the administration of contrast dye to enhance image detail. |
15 | $85 | $400 |
| X-ray for bone length assessment An X-ray image is taken to measure and evaluate the length of bones. |
15 | $11 | $113 |
| 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 | $79 |
| 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. |
14 | $8 | $102 |
| 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 | $65 |
| X-ray of finger, minimum of 2 views An X-ray imaging test of a finger using at least two different angles to visualize the bones and surrounding structures. |
13 | $6 | $46 |
| Ultrasound guidance for needle placement Use of ultrasound imaging to guide the precise placement of a needle during a medical procedure. |
12 | $25 | $442 |
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 ↗$140
Total received (2023-2024)
Avg $70/year across 2 years
Bottom 43% in CA for radiation oncology
5
Companies
5
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
$140 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$92
2023
$48
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Siemens Medical Solutions USA, Inc.
$51
AngioDynamics, Inc.
$24
Avanos Medical
$16
Top 3 companies account for 100.0% of 2024 payments
All-time payments by company (2023-2024) ›
Siemens Medical Solutions USA, Inc.
$51
Bard Peripheral Vascular, Inc.
$27
AngioDynamics, Inc.
$24
Checkpoint Surgical, Inc
$21
Avanos Medical
$16
Top 3 companies account for 73.5% of all-time payments
Associated products mentioned in payments ›
ARTIS icono biplane · COOLIEF* COOLED RADIOFREQUENCY · Checkpoint Stimulators · NANOKNIFE · Trek
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
1,051
Per 100K population
10.7
County median income
$87,760
Nearest hospital
CEDARS-SINAI 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. Tivorsak is a mixed practice specialist, with moderate Medicare volume, 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. Tivorsak experienced with foot x-ray, 3+ views?
Based on Medicare claims data, Dr. Tivorsak performed 284 foot x-ray, 3+ views 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. Tivorsak receive payments from pharmaceutical companies?
Yes. Dr. Tivorsak received a total of $140 from 5 companies across 5 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. Tivorsak's costs compare to other radiation oncologists in West Hollywood?
Dr. Tivorsak'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. Tivorsak) 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
Radiation Oncologists in West Hollywood
Browse radiation oncologists in West Hollywood ranked by procedure volume and transparency data.
Highest volume
Top Radiation Oncologists in CA
Radiation oncologists ranked by total Medicare services performed statewide.
Industry payments
Pharma Payments to Radiation Oncologists in CA
Which CA radiation oncologists 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
Bard Peripheral Vascular, Inc. Payments to Doctors
See all physicians who received payments from Bard Peripheral Vascular, Inc.
By company
AngioDynamics, Inc. Payments to Doctors
See all physicians who received payments from AngioDynamics, 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