Medicare Enrolled
Dr. Jonathan Posin, M.D.
Radiation Oncology · Walnut Creek, CA
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
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. Posin 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. Posin
Dr. Jonathan Posin is a radiation oncology specialist in Walnut Creek, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Posin performed 4,481 Medicare services across 4,209 unique beneficiaries.
Between the years covered by Open Payments, Dr. Posin received a total of $215 from 1 pharmaceutical and/or device company across 1 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in radiation oncology. 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. Posin 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 33% volume in CA
$215 industry payments
Medicare Practice Summary
Medicare Utilization ↗4,481
Medicare services
Top 33% in CA for radiation oncology
4,209
Unique beneficiaries
$20
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~236 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 |
|---|---|---|---|
| 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. |
1,376 | $8 | $36 |
| 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. |
440 | $11 | $50 |
| 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. |
200 | $35 | $250 |
| Digital breast tomosynthesis (3D mammogram) A specialized imaging test that creates three-dimensional pictures of the breast tissue to help detect abnormalities. |
173 | $25 | $150 |
| 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. |
129 | $68 | $383 |
| 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. |
127 | $25 | $131 |
| Limited ultrasound of 1 breast A focused ultrasound examination of a single breast to evaluate specific areas of concern. |
99 | $31 | $112 |
| Diagnostic mammography of both breasts | 95 | $42 | $180 |
| 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. |
94 | $34 | $284 |
| Diagnostic mammography of 1 breast An X-ray examination of one breast to evaluate specific breast symptoms or abnormalities. |
92 | $33 | $150 |
| 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. |
88 | $30 | $225 |
| 3D screening mammography (tomosynthesis) A screening imaging test of the breast using 3D technology to detect potential abnormalities. |
72 | $33 | $150 |
| Screening mammography An X-ray of the breast used to detect breast cancer in women who have no signs or symptoms of the disease. |
72 | $42 | $150 |
| 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. |
62 | $9 | $40 |
| 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. |
55 | $9 | $51 |
| 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. |
51 | $8 | $40 |
| 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. |
47 | $7 | $40 |
| 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. |
46 | $8 | $44 |
| 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. |
45 | $7 | $41 |
| 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. |
41 | $11 | $68 |
| 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. |
36 | $40 | $277 |
| Abdominal X-ray, 2 views An X-ray imaging test of the abdomen using two different angles to visualize internal structures. |
36 | $10 | $45 |
| Bone density scan (DEXA) of forearm, finger, hand, or foot A DEXA scan measures bone mineral density in the forearm, finger, hand, or foot. This test helps assess bone strength and risk of fracture. |
34 | $11 | $50 |
| 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. |
31 | $10 | $48 |
| Complete pelvic ultrasound An imaging test using sound waves to create pictures of the organs and structures within the pelvis. |
31 | $30 | $146 |
| 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. |
30 | $28 | $66 |
| 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. |
28 | $7 | $40 |
| 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. |
26 | $7 | $41 |
| 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. |
26 | $30 | $146 |
| 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. |
25 | $7 | $41 |
| 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. |
25 | $7 | $37 |
| Bone scan with multiple time points A nuclear medicine imaging test that captures images of the bones at various intervals to assess bone health and detect abnormalities. |
25 | $44 | $288 |
| 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. |
23 | $37 | $247 |
| 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. |
23 | $10 | $42 |
| 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. |
23 | $79 | $593 |
| 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. |
22 | $8 | $43 |
| 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. |
21 | $12 | $69 |
| 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. |
20 | $76 | $564 |
| Complete ultrasound of abdomen A diagnostic imaging test that uses sound waves to create detailed pictures of the organs and structures within the abdomen. |
20 | $34 | $182 |
| 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. |
19 | $58 | $333 |
| 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. |
19 | $9 | $49 |
| Knee X-ray, 4 or more views An imaging test using X-rays to create multiple pictures of the knee joint from different angles. |
19 | $10 | $48 |
| 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. |
19 | $7 | $49 |
| 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. |
19 | $19 | $180 |
| 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. |
18 | $6 | $50 |
| X-ray of both hips, minimum of 5 views An X-ray imaging test that captures at least five different views of both hip joints to evaluate bone structure and alignment. |
18 | $13 | $55 |
| X-ray of toe, minimum of 2 views An X-ray imaging test of the toe using at least two different angles to visualize the bones and surrounding structures. |
18 | $6 | $31 |
| Complete ultrasound of retroperitoneum An ultrasound examination of the structures located behind the abdominal cavity. |
18 | $28 | $177 |
| Whole body bone and joint nuclear medicine scan A nuclear medicine imaging test that uses a radioactive tracer to create pictures of the entire skeleton and joints. This scan helps evaluate bone health and detect abnormalities throughout the body. |
18 | $37 | $276 |
| Lung ventilation and perfusion scan A nuclear medicine test that uses radioactive tracers to evaluate both air flow (ventilation) and blood flow (perfusion) in the lungs. |
18 | $45 | $163 |
| 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. |
17 | $72 | $391 |
| 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. |
17 | $6 | $43 |
| Wrist X-ray, 2 views An X-ray imaging test of the wrist using two different angles to visualize the bones and joints. |
17 | $7 | $40 |
| 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. |
16 | $75 | $399 |
| Abdominal X-ray, 1 view An X-ray image of the abdomen taken from a single angle to visualize internal structures. |
16 | $8 | $35 |
| 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. |
16 | $25 | $130 |
| Ultrasound of scrotum An imaging test that uses sound waves to create pictures of the scrotum and its contents. It helps evaluate the testicles and surrounding structures. |
16 | $26 | $141 |
| 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. |
15 | $8 | $37 |
| 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. |
15 | $8 | $43 |
| Ultrasound of abdominal aorta An imaging test that uses sound waves to create pictures of the abdominal aorta, the large blood vessel that carries blood from the heart to the lower body. |
15 | $30 | $95 |
| 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. |
15 | $22 | $93 |
| SPECT/CT scan, single area A nuclear medicine imaging study that combines single-photon emission computed tomography (SPECT) with a concurrent CT scan to create detailed images of a single body area. |
15 | $61 | $150 |
| Radioactive material quantification A procedure to measure the amount of radioactive substances present in the body or in a sample. |
15 | $19 | $80 |
| 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. |
15 | $20 | $175 |
| 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. |
14 | $12 | $55 |
| Bone density scan (DEXA) of hip, pelvis, and spine This test measures bone density in the hip, pelvis, and spine to assess bone strength. It also includes an assessment for spine fractures. |
14 | $17 | $75 |
| Nuclear medicine stomach emptying study A nuclear medicine test used to assess how quickly the stomach empties its contents. |
14 | $34 | $150 |
| 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. |
13 | $8 | $40 |
| Abdominal X-ray, minimum 3 views An X-ray imaging test of the abdomen that captures at least three different views to visualize internal structures. |
13 | $12 | $50 |
| Lymphatic system nuclear medicine study A nuclear medicine imaging test used to evaluate the structure and function of the lymphatic system. |
13 | $51 | $288 |
| Breast biopsy with ultrasound-guided localization device placement This procedure involves taking a tissue sample from a breast growth and placing a marker device to locate it, guided by ultrasound imaging. |
12 | $137 | $1,430 |
| Nuclear medicine liver and bile duct scan A nuclear medicine imaging test to evaluate the liver and bile duct system. |
12 | $32 | $114 |
| 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. |
11 | $7 | $38 |
| 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. |
11 | $7 | $38 |
| Swallowing function imaging Imaging used to evaluate how well a person can swallow. This procedure visualizes the swallowing process to assess function. |
11 | $23 | $120 |
| Parathyroid nuclear medicine study with SPECT/CT A nuclear medicine imaging test that uses a radioactive tracer to visualize the parathyroid glands, combined with SPECT and CT scans for detailed anatomical localization. |
11 | $67 | $259 |
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.
0.4% high complexity
27.2% medium
72.4% routine
Industry Payment Transparency
Open Payments through 2019 ↗$215
Total received (2019-2019)
Top 46% in CA for radiation oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
1
Company
1
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
$215 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2019
$215
Payments by company (2019)
Consulting
Speaking
Meals & Travel
Research
Varian Medical Systems, Inc.
$215
Top 3 companies account for 100.0% of 2019 payments
Associated products mentioned in payments ›
OTHER
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 (100%) are consulting fees, which typically reflect recognized clinical expertise sought by manufacturers.
Geographic Context
Radiation oncologists within 10 mi
331
Per 100K population
28.5
County median income
$125,727
Nearest hospital
JOHN MUIR MEDICAL CENTER - WALNUT CREEK CAMPUS
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 2019 |
| 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. Posin is a mixed practice specialist, with moderate Medicare volume, with consulting-driven 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. Posin experienced with chest x-ray, 1 view?
Based on Medicare claims data, Dr. Posin performed 1,376 chest x-ray, 1 view 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. Posin receive payments from pharmaceutical companies?
Yes. Dr. Posin received a total of $215 from 1 company across 1 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. Posin's costs compare to other radiation oncologists in Walnut Creek?
Dr. Posin's average Medicare payment per service is $20. 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. Posin) 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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