Medicare Enrolled

Dr. James Callas, MD

Radiation Oncology · Killeen, TX
Practice pattern: Mixed Practice — Diverse clinical practice across multiple procedure types
Low-engagement
3800 S W S YOUNG DR STE 201, Killeen, TX 76542
2542459175
In practice since 2005 (20 years)
NPI: 1316933401 verify on NPPES ↗
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. Callas 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. Callas

Dr. James Callas is a radiation oncology specialist in Killeen, TX, with 20 years of NPI registration. Based on federal Medicare data, Dr. Callas performed 1,335 Medicare services across 1,292 unique beneficiaries.

Between the years covered by Open Payments, Dr. Callas received a total of $972 from 3 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. Callas is Very High — reflecting how much public federal data is available about this provider. This is not a quality rating. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.

✓ 20 years in practice ▲ 1,335 Medicare services $972 industry payments

Medicare Practice Summary

Medicare Utilization ↗
1,335
Medicare services
Bottom 39% in TX for radiation oncology
Lower Medicare volume may reflect subspecialty focus, hospital-based work, or a higher share of non-Medicare patients.
1,292
Unique beneficiaries
$67
Avg. Medicare payment
Medicare patients only (65+ / disabled) · Not a quality rating · How to read this →
~67 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
Screening mammography
An X-ray of the breast used to detect breast cancer in women who have no signs or symptoms of the disease.
 392 $122 $395
3D screening mammography (tomosynthesis)
A screening imaging test of the breast using 3D technology to detect potential abnormalities.
 383 $51 $161
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.
 149 $37 $120
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.
 68 $29 $104
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.
 65 $26 $90
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.
 54 $25 $86
Digital breast tomosynthesis (3D mammogram)
A specialized imaging test that creates three-dimensional pictures of the breast tissue to help detect abnormalities.
 47 $39 $161
Diagnostic mammography of 1 breast
An X-ray examination of one breast to evaluate specific breast symptoms or abnormalities.
 40 $81 $387
Limited ultrasound of 1 breast
A focused ultrasound examination of a single breast to evaluate specific areas of concern.
 34 $59 $265
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.
 21 $29 $95
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.
 19 $27 $101
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 $33 $110
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.
 17 $30 $93
MRI of lower spine, without contrast
A magnetic resonance imaging scan of the lower spinal canal that does not use contrast dye to create detailed images of the spine.
 16 $132 $578
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.
 11 $17 $79
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 ↗
$972
Total received (2022-2024)
Avg $324/year across 3 years
Top 28% in TX for radiation oncology
3
Companies
11
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
$972 (100.0%)

Payment trend by year

Annual totals from pharmaceutical and medical device companies.

2024
$127
2023
$209
2022
$636

Payments by company (2024)

Consulting
Speaking
Meals & Travel
Research
Stryker Corporation
$777
Siemens Medical Solutions USA, Inc.
$139
Relievant Medsystems, Inc.
$56
Top 3 companies account for 100.0% of total payments
Associated products mentioned in payments ›
ACCOLADE · ACUSON Redwood Diagnostic Ultrasound System · AUGMENT INJECTABLE · ICONIX · INFINITY · Intracept · Mammomat Revelation · OMEGA · SALVATION · TRIATHLON
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.

Equivalent to $73 per 100 Medicare services performed
Looking for a radiation oncology specialist in Killeen?
Compare radiation oncologists in the Killeen area by procedure volume, costs, and industry payment transparency.
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Geographic Context

Radiation oncologists within 10 mi
26
Per 100K population
6.8
County median income
$66,051
Nearest hospital
ADVENTHEALTH CENTRAL TEXAS
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 measures how much public data is available about a provider — not how good they are. How we calculate this →

Summary

Dr. Callas is a mixed practice specialist, with moderate Medicare volume, with low-engagement industry engagement, with 20 years of NPI registration.

This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →

Frequently Asked Questions

Is Dr. Callas experienced with screening mammography?
Based on Medicare claims data, Dr. Callas performed 392 screening mammography 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. Callas receive payments from pharmaceutical companies?
Yes. Dr. Callas received a total of $972 from 3 companies across 11 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. Callas's costs compare to other radiation oncologists in Killeen?
Dr. Callas's average Medicare payment per service is $67. 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. Callas) 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. The Transparency Score measures 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

Data Disclaimer — Data sourced from the Centers for Medicare & Medicaid Services (CMS): National Plan and Provider Enumeration System (NPPES), Open Payments program, Medicare Provider Utilization and Payment Data, and Provider Enrollment & Certification data (PECOS). Published under the Freedom of Information Act (FOIA). This website is not affiliated with, endorsed by, or authorized by CMS, HHS, or the U.S. Government. Data may contain errors as reported to CMS by providers and reporting entities. Payments from industry are legal and do not indicate wrongdoing. Medicare data reflects only patients aged 65+ or those with qualifying disabilities. For corrections, contact CMS directly. This information does not constitute medical advice and should not be used as the sole basis for choosing a healthcare provider. Procedure descriptions use plain language and do not reference CPT® codes, which are copyrighted by the American Medical Association. Full methodology → · Report a data error → · Privacy policy →