Medicare Enrolled
Dr. Omar Kallas, M.D.
Radiation Oncology · Atlanta, GA
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. Kallas 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. Kallas?
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What this data tells you about Dr. Kallas
Dr. Omar Kallas is a radiation oncology specialist in Atlanta, GA, with 11 years of NPI registration. Based on federal Medicare data, Dr. Kallas performed 20,293 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Kallas received a total of $59 from 2 pharmaceutical and/or device companies across 2 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. Kallas 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.
✓ 11 years of NPI registration
▲ Top 3% volume in GA
$59 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗20,293
Medicare services
Top 3% in GA for radiation oncology
Not available
Unique patients (not deduplicated)
$10
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 |
|---|---|---|---|
| MRI contrast dye injection (gadoterate) Administration of gadoterate meglumine, a contrast agent, in a 0.1 ml dose. |
14,100 | $0 | $1 |
| MRI contrast dye injection (gadobutrol) | 1,180 | $0 | $2 |
| Gadobenate dimeglumine injection Administration of gadobenate dimeglumine, a contrast agent used to enhance imaging results. |
1,143 | $1 | $11 |
| 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. |
955 | $7 | $29 |
| 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. |
225 | $30 | $131 |
| 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. |
209 | $66 | $276 |
| 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. |
180 | $26 | $105 |
| 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. |
177 | $216 | $971 |
| 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. |
155 | $217 | $1,178 |
| 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. |
131 | $62 | $264 |
| 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. |
115 | $36 | $169 |
| Abdominal X-ray, 1 view An X-ray image of the abdomen taken from a single angle to visualize internal structures. |
109 | $7 | $29 |
| 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. |
92 | $38 | $159 |
| 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. |
79 | $8 | $34 |
| 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. |
72 | $64 | $296 |
| Complete ultrasound of retroperitoneum An ultrasound examination of the structures located behind the abdominal cavity. |
70 | $25 | $114 |
| 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. |
67 | $666 | $1,473 |
| 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. |
65 | $16 | $69 |
| CT scan of chest with contrast A computed tomography scan of the chest using a contrast dye to enhance the visibility of internal structures. |
63 | $43 | $192 |
| 3D radiographic procedure A radiographic imaging technique that creates three-dimensional representations of internal structures. |
62 | $10 | $69 |
| 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. |
61 | $30 | $93 |
| 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. |
60 | $7 | $30 |
| 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. |
50 | $19 | $91 |
| 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. |
49 | $58 | $244 |
| Swallowing function imaging Imaging used to evaluate how well a person can swallow. This procedure visualizes the swallowing process to assess function. |
48 | $21 | $82 |
| 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. |
46 | $7 | $30 |
| 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. |
42 | $8 | $40 |
| 3D screening mammography (tomosynthesis) A screening imaging test of the breast using 3D technology to detect potential abnormalities. |
40 | $30 | $95 |
| Screening mammography An X-ray of the breast used to detect breast cancer in women who have no signs or symptoms of the disease. |
40 | $38 | $120 |
| 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. |
33 | $6 | $26 |
| 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. |
31 | $37 | $156 |
| Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries | 31 | $281 | $550 |
| Imaging guidance for procedure, 60 minutes or less Use of imaging technology to guide a medical procedure. This service lasts 60 minutes or less. |
30 | $13 | $27 |
| 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. |
28 | $6 | $27 |
| 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. |
26 | $7 | $28 |
| 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. |
24 | $6 | $29 |
| 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. |
22 | $36 | $156 |
| 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. |
20 | $93 | $362 |
| 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 | $7 | $27 |
| 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. |
18 | $20 | $57 |
| X-ray of hand, 2 views An X-ray imaging test of the hand using two different angles to visualize the bones and joints. |
17 | $6 | $26 |
| 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. |
17 | $7 | $33 |
| 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. |
17 | $81 | $322 |
| 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 | $247 |
| 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. |
17 | $15 | $48 |
| 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. |
16 | $58 | $270 |
| 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. |
16 | $19 | $112 |
| X-ray of voice box or throat An X-ray imaging test used to visualize the structures of the voice box or throat. |
15 | $11 | $50 |
| 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. |
15 | $5 | $27 |
| 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. |
15 | $33 | $156 |
| Complete ultrasound of abdomen A diagnostic imaging test that uses sound waves to create detailed pictures of the organs and structures within the abdomen. |
15 | $26 | $125 |
| 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. |
14 | $8 | $36 |
| Ultrasound of transplanted kidney An ultrasound scan of a transplanted kidney to visualize its structure and blood flow. This imaging test helps assess the health and function of the transplanted organ. |
14 | $29 | $116 |
| 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. |
13 | $39 | $168 |
| 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. |
13 | $6 | $27 |
| 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. |
13 | $6 | $27 |
| 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. |
12 | $30 | $176 |
| 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. |
12 | $38 | $148 |
| 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. |
12 | $6 | $27 |
| 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 | $21 | $86 |
| Digital breast tomosynthesis (3D mammogram) A specialized imaging test that creates three-dimensional pictures of the breast tissue to help detect abnormalities. |
12 | $20 | $95 |
| 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. |
11 | $69 | $270 |
| 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 | $5 | $25 |
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.
0.1% high complexity
91.2% medium
8.7% routine
Industry Payment Transparency
Open Payments through 2024 ↗$59
Total received (2018-2024)
Avg $30/year across 2 years
Bottom 31% in GA for radiation oncology
2
Companies
2
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
$18
2018
$41
Payments by company (2024)
PROGENICS PHARMACEUTICALS, INC.
$18
Top 3 companies account for 100.0% of 2024 payments
All-time payments by company (2018-2024) ›
Medtronic Vascular, Inc.
$41
PROGENICS PHARMACEUTICALS, INC.
$18
Top 3 companies account for 100.0% of all-time payments
Associated products mentioned in payments ›
Concerto · PYLARIFY
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
494
County median income
$77,683
Nearest hospital to ZIP centroid (approximate)
EMORY UNIVERSITY 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. Kallas is a mixed practice specialist, with above-average Medicare volume (top 3% in GA).
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Kallas experienced with mri contrast dye injection (gadoterate)?
Based on Medicare claims data, Dr. Kallas performed 14,100 mri contrast dye injection (gadoterate) 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. Kallas receive payments from pharmaceutical companies?
Yes. Dr. Kallas received a total of $59 from 2 companies across 2 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. Kallas's costs compare to other radiation oncologists in Atlanta?
Dr. Kallas's average Medicare payment per service is $10. 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. Kallas) 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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