Medicare Enrolled
Dr. Gary Brennan, M.D.
Radiation Oncology · Beachwood, OH
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
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. Brennan 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. Brennan?
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What this data tells you about Dr. Brennan
Dr. Gary Brennan is a radiation oncology specialist in Beachwood, OH, with 19 years of NPI registration. Based on federal Medicare data, Dr. Brennan performed 6,758 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Brennan received a total of $2,788 from 7 pharmaceutical and/or device companies across 41 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Brennan 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 of NPI registration
▲ Top 7% volume in OH
$2,788 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗6,758
Medicare services
Top 7% in OH for radiation oncology
Not available
Unique patients (not deduplicated)
$28
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
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. |
1,239 | $7 | $69 |
| 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. |
607 | $8 | $80 |
| 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. |
376 | $29 | $310 |
| 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. |
279 | $64 | $887 |
| 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. |
209 | $28 | $235 |
| Abdominal X-ray, 1 view An X-ray image of the abdomen taken from a single angle to visualize internal structures. |
201 | $6 | $78 |
| 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. |
193 | $37 | $428 |
| Complete ultrasound of retroperitoneum An ultrasound examination of the structures located behind the abdominal cavity. |
181 | $26 | $272 |
| 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. |
177 | $63 | $847 |
| CT scan of chest with contrast A computed tomography scan of the chest using a contrast dye to enhance the visibility of internal structures. |
162 | $41 | $459 |
| Low dose CT scan of chest for lung cancer screening A specialized CT scan of the chest using a lower radiation dose to screen for lung cancer. |
160 | $50 | $246 |
| 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. |
141 | $20 | $218 |
| 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. |
115 | $16 | $176 |
| 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. |
113 | $65 | $690 |
| 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. |
110 | $85 | $845 |
| 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. |
104 | $8 | $78 |
| 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. |
93 | $26 | $228 |
| 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. |
92 | $34 | $413 |
| 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. |
87 | $18 | $211 |
| 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. |
80 | $6 | $67 |
| 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. |
78 | $8 | $60 |
| 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. |
78 | $6 | $67 |
| 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. |
75 | $81 | $695 |
| 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. |
68 | $25 | $265 |
| 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. |
66 | $6 | $68 |
| Imaging of urinary tract with contrast An imaging test of the urinary tract performed after a contrast agent is injected to enhance visibility of the structures. |
65 | $17 | $138 |
| Sedation by physician, initial 15 minutes Administration of a drug to induce depression of consciousness by the physician performing a procedure. This code covers the initial 15 minutes of sedation for patients aged 5 years or older. |
60 | $10 | $350 |
| 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. |
59 | $7 | $65 |
| Ultrasound guidance for blood vessel access Use of ultrasound imaging to help locate and access a blood vessel. This guidance assists healthcare providers in performing procedures such as inserting IV lines or drawing blood. |
59 | $11 | $123 |
| 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. |
55 | $62 | $632 |
| MRI of abdomen with and without contrast An MRI scan of the abdomen using contrast dye before and after administration to create detailed images of internal structures. |
55 | $81 | $835 |
| Fluoroscopic guidance for central vein access device Use of live X-ray imaging to guide the placement or removal of a central vein access device. |
53 | $14 | $147 |
| 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. |
50 | $71 | $962 |
| 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. |
49 | $7 | $82 |
| Abdominal fluid drainage with imaging guidance Removal of fluid from the abdominal cavity using imaging technology to guide the procedure. |
47 | $79 | $732 |
| MRI of pelvis with and without contrast A magnetic resonance imaging scan of the pelvic area performed both before and after the administration of a contrast dye to enhance image detail. |
47 | $81 | $846 |
| 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. |
42 | $6 | $68 |
| 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. |
42 | $30 | $323 |
| 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. |
41 | $6 | $68 |
| 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. |
40 | $35 | $394 |
| Injection into lower spine canal with imaging guidance A procedure where a substance is injected into the lower part of the spinal canal. The injection is performed using imaging guidance to ensure accurate placement. |
39 | $74 | $618 |
| Chest fluid aspiration with imaging guidance This procedure involves removing fluid from the chest cavity using imaging technology to guide the needle placement. |
38 | $84 | $560 |
| 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. |
32 | $61 | $614 |
| 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. |
32 | $6 | $61 |
| 3D radiographic procedure A radiographic imaging technique that creates three-dimensional representations of internal structures. |
32 | $7 | $76 |
| 3D radiographic procedure with computerized image postprocessing A radiographic imaging procedure that creates three-dimensional images using computerized processing of the captured data. |
30 | $29 | $322 |
| Insertion of tunneled central venous catheter for infusion, age 5+ A surgical procedure to place a long-term catheter into a large vein for delivering medications or fluids. The catheter is tunneled under the skin to reduce infection risk and provide stable access for patients aged 5 and older. |
28 | $196 | $2,268 |
| 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. |
28 | $7 | $82 |
| 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. |
28 | $6 | $52 |
| X-ray of entire middle and lower spine, 2-3 views An X-ray imaging test that captures 2 to 3 views of the entire middle and lower spine to visualize the bones and structures in these areas. |
27 | $11 | $89 |
| 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. |
26 | $6 | $68 |
| Limited retroperitoneal ultrasound A focused ultrasound exam of the area behind the abdominal cavity to evaluate specific structures. |
26 | $19 | $219 |
| Complete ultrasound of abdomen and pelvis blood flow This procedure uses sound waves to create images of blood flow in the arteries and veins of the abdomen and pelvis. It evaluates the rate and direction of blood movement within these vessels. |
26 | $40 | $684 |
| 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. |
25 | $9 | $107 |
| 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. |
24 | $40 | $398 |
| Nuclear medicine liver and bile duct study with drugs A nuclear medicine imaging test to examine the liver and bile duct system using administered drugs. |
24 | $33 | $286 |
| 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. |
20 | $30 | $428 |
| 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. |
20 | $5 | $68 |
| Radiologist review of CT-guided needle placement A radiologist reviews the CT imaging used to guide the placement of a needle. |
19 | $53 | $433 |
| 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 | $10 | $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. |
18 | $8 | $82 |
| Radiologist review of bile duct tube placement imaging A radiologist reviews images taken during the placement of a tube into the bile duct using an endoscope. |
18 | $9 | $264 |
| Ultrasound guidance for needle placement Use of ultrasound imaging to guide the precise placement of a needle during a medical procedure. |
18 | $21 | $252 |
| Ultrasound-guided fine needle aspiration biopsy, first lesion A biopsy procedure where a thin needle is used to collect tissue samples from a growth, guided by ultrasound imaging. This code applies to the first lesion or mass sampled during the session. |
17 | $51 | $491 |
| Removal of tunneled central venous tube This procedure involves the removal of a catheter that has been surgically placed under the skin and threaded into a large vein. |
17 | $104 | $1,105 |
| 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. |
17 | $6 | $62 |
| 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. |
17 | $7 | $68 |
| 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. |
17 | $54 | $543 |
| 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. |
17 | $21 | $232 |
| 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. |
17 | $23 | $152 |
| 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. |
17 | $38 | $336 |
| 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. |
15 | $10 | $109 |
| CT scan of middle spine, without contrast A CT scan of the middle spine performed without the use of contrast dye. This imaging test uses X-rays to create detailed pictures of the vertebrae and surrounding structures. |
15 | $30 | $391 |
| Abdominal X-ray series with chest X-ray This procedure involves taking a series of X-ray images of the abdomen along with a single X-ray image of the chest. |
15 | $11 | $102 |
| Double contrast esophagram An X-ray of the esophagus using two types of contrast material to create detailed images of the upper digestive tract. |
15 | $26 | $170 |
| Upper GI series with double contrast An X-ray exam of the upper digestive tract using two types of contrast material to visualize the esophagus, stomach, and small intestine. |
15 | $31 | $259 |
| 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. |
14 | $85 | $792 |
| Nuclear medicine stomach emptying study A nuclear medicine test used to assess how quickly the stomach empties its contents. |
14 | $29 | $293 |
| Nuclear medicine study to assess blood loss A nuclear medicine test used to evaluate and locate active bleeding within the body. |
14 | $36 | $368 |
| Central venous port insertion A surgical procedure to place a small reservoir under the skin for long-term access to the bloodstream. The device is connected to a vein to allow for repeated medication administration or blood draws. |
13 | $255 | $2,687 |
| 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. |
13 | $22 | $174 |
| Liver needle biopsy through skin A procedure in which a needle is inserted through the skin to remove a small sample of liver tissue for examination. |
12 | $52 | $735 |
| Complete ultrasound of abdomen A diagnostic imaging test that uses sound waves to create detailed pictures of the organs and structures within the abdomen. |
12 | $27 | $275 |
| 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 | $5 | $61 |
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. These counts do not measure clinical quality or years of experience.
0.7% high complexity
51.9% medium
47.5% routine
Industry Payment Transparency
Open Payments through 2024 ↗$2,788
Total received (2018-2024)
Avg $465/year across 6 years
Top 14% in OH for radiation oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
7
Companies
41
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$38
2023
$13
2022
$715
2020
$98
2019
$1,548
2018
$376
Payments by company (2024)
Inari Medical, Inc.
$23
Medtronic, Inc.
$15
Top 3 companies account for 100.0% of 2024 payments
All-time payments by company (2018-2024) ›
Medtronic USA, Inc.
$1,768
MediView XR, Inc.
$700
Penumbra, Inc.
$192
Medtronic, Inc.
$43
BARD PERIPHERAL VASCULAR, INC.
$31
Bard Peripheral Vascular, Inc.
$30
Inari Medical, Inc.
$23
Top 3 companies account for 95.4% of all-time payments
Associated products mentioned in payments ›
COVERA · EMPRINT · FLOWTRIEVER CATHETER · Indigo · KYPHON Balloon Kyphoplasty · KYPHON EXPRESS II KYPHOPAK TRAY · LUTONIX · OSTEOCOOL RF ABLATION · S
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. 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 →
Geographic Context
Radiation oncologists in nearby ZIP areas
236
County median income
$62,823
Nearest hospital to ZIP centroid (approximate)
SOUTH POINTE HOSPITAL
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | 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. Brennan is a mixed practice specialist, with above-average Medicare volume (top 7% in OH), 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. Brennan experienced with chest x-ray, 1 view?
Based on Medicare claims data, Dr. Brennan performed 1,239 chest x-ray, 1 view services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Brennan receive payments from pharmaceutical companies?
Yes. Dr. Brennan received a total of $2,788 from 7 companies across 41 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. 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. Brennan's costs compare to other radiation oncologists in Beachwood?
Dr. Brennan's average Medicare payment per service is $28. 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. Brennan) 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 the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. 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?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: 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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