Dr. Stefan Ruehm, MD
What this data tells you about Dr. Ruehm
Dr. Stefan Ruehm is a radiation oncology specialist in Los Angeles, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Ruehm performed 53,391 Medicare services across 1,438 unique beneficiaries.
Between the years covered by Open Payments, Dr. Ruehm received a total of $781 from 4 pharmaceutical and/or device companies across 11 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. Ruehm 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.
Medicare Practice Summary
Medicare Utilization ↗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. |
39,650 | $0 | $5 |
| MRI contrast dye injection (gadoterate) Administration of gadoterate meglumine, a contrast agent, in a 0.1 ml dose. |
7,900 | $0 | $1 |
| MRI contrast dye injection (gadobutrol) | 4,750 | $0 | $16 |
| 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. |
256 | $7 | $36 |
| 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. |
206 | $26 | $449 |
| 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. |
185 | $257 | $3,576 |
| 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. |
81 | $205 | $2,861 |
| 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. |
67 | $107 | $907 |
| 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. |
52 | $361 | $3,131 |
| MRI of heart with and without contrast A magnetic resonance imaging scan of the heart performed both before and after the administration of a contrast dye to enhance image detail. |
52 | $322 | $3,688 |
| MRI of heart blood flow An MRI scan that visualizes the flow of blood within the heart. |
43 | $44 | $1,602 |
| 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. |
33 | $176 | $1,351 |
| MRI of chest blood vessels An MRI scan that uses magnetic fields and radio waves to create detailed images of the blood vessels in the chest. |
26 | $280 | $2,984 |
| CT scan of pelvic blood vessels with contrast A CT scan that uses contrast dye to create detailed images of the blood vessels in the pelvis. |
24 | $225 | $2,652 |
| CT scan of heart for calcium evaluation A CT scan of the heart used to evaluate calcium levels in the blood vessels. |
18 | $81 | $560 |
| 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. |
18 | $150 | $1,367 |
| MRI of abdominal blood vessels An MRI scan that creates detailed images of the blood vessels in the abdomen. |
17 | $257 | $3,152 |
| CT scan of abdominal aorta and leg arteries with contrast A CT scan that uses contrast dye to create detailed images of the abdominal aorta and the arteries in both legs. |
13 | $89 | $555 |
Industry Payment Transparency
Open Payments through 2024 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2024)
All-time payments by company (2018-2024) ›
Associated products mentioned in payments ›
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
0.6 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. Ruehm is a mixed practice specialist, with above-average Medicare volume (top 2% in CA), 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. Ruehm experienced with contrast dye for imaging (iodine-based)?
Does Dr. Ruehm receive payments from pharmaceutical companies?
How do Dr. Ruehm's costs compare to other radiation oncologists in Los Angeles?
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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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