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Data Sources: Centers for Medicare & Medicaid Services (CMS), Medicare Provider Utilization and Payment Data
Disclaimer: This site is an independent journalism project. Data analysis and editorial content are not affiliated with or endorsed by CMS or any government agency. All spending figures are based on publicly available Medicare payment records.
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Methodologyโ€ขDownload Data
  1. Home
  2. Providers
  3. Gregory Sibley
๐ŸŽ—๏ธ
MDIndividual

Gregory Sibley, M.D.

NPI: 1043211360
Fairfax, VA
10 years of data
Radiation Oncology
$11.8M
Total Payments
16.9K
Beneficiaries
48.0K
Services
5.51x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$11.8M
Specialty median$300.5K

๐Ÿ“‹ Key Findings

1Billed $11.8M over 10 years
25.51x markup ratio (above median)
399th percentile in Radiation Oncology by payments
413 procedures with >3x markup
โœ“ No flags detected

๐Ÿ”Ž Data Analysis

This provider's $11.8M in total Medicare payments ranks in the 99th percentile of Radiation Oncology providers nationally.

Their average markup ratio of 5.51x is significantly above the specialty median of 5.0x.

AI-generated analysis based on Medicare payment data.

Annual Medicare Payments

Annual Services Provided

Avg Payment per Service

Markup Ratio Over Time

Submitted Charges vs. Medicare Payments

Average per-service amounts submitted by the provider compared to what Medicare actually paid โ€” the gap represents the markup.

YearAvg SubmittedAvg PaidMarkup RatioGap per ServiceTotal PaymentsServicesBeneficiaries
2014$1.2K$241.534.85x$928.70$1.6M7.4K1.9K
2015$1.2K$257.144.63x$932.97$1.2M5.0K1.7K
2016$1.2K$251.954.85x$968.92$1.0M4.5K1.5K
2017$1.4K$286.734.92x$1.1K$1.2M5.2K1.8K
2018$1.4K$293.834.66x$1.1K$1.1M4.7K1.6K
2019$1.7K$382.454.40x$1.3K$1.5M5.4K2.0K
2020$1.8K$367.214.84x$1.4K$1.4M4.9K1.8K
2021$1.9K$420.484.42x$1.4K$1.0M3.4K1.4K
2022$1.6K$327.874.86x$1.3K$1.2M4.1K1.7K
2023$1.3K$253.025.26x$1.1K$768.6K3.4K1.5K

Top Procedures (20)

G6015Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment sessionโš  7.4x markup
$3.2M
9.1K services$350.80/svc7.36x markup
77014CT scan guidance for insertion of radiation therapy fieldsโš  5.6x markup
$980.3K
9.4K services$104.76/svc5.56x markup
77301Management of modulation radiotherapy planningโš  3.5x markup
$974.4K
538 services$1.8K/svc3.45x markup
77373Stereotactic body radiation therapy 1 or more lesions using imaging guidanceโš  7.0x markup
$960.0K
845 services$1.1K/svc7.02x markup
G6012Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 6-10mev
$630.3K
2.6K services$245.34/svc2.16x markup
G6013Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 11-19mev
$594.3K
2.4K services$250.01/svc2.47x markup
77290Management of radiation therapy, simulation, complex
$557.5K
1.2K services$472.05/svc2.49x markup
77427Radiation treatment management, 5 treatmentsโš  6.3x markup
$552.2K
3.3K services$165.22/svc6.27x markup
77418Intensity modulated radiation treatment delivery per sessionโš  7.1x markup
$546.4K
1.5K services$365.23/svc7.07x markup
77295Management of radiation therapy, 3Dโš  9.4x markup
$401.2K
893 services$449.31/svc9.45x markup
55874Injection of biodegradable material next to prostateโš  3.6x markup
$311.8K
100 services$3.1K/svc3.65x markup
77338Design and construction of device for radiation therapyโš  5.6x markup
$291.3K
639 services$455.84/svc5.62x markup
77336Radiation therapy consultation per weekโš  4.4x markup
$271.4K
3.6K services$76.32/svc4.36x markup
77263Management of radiation therapy, complexโš  6.8x markup
$196.3K
1.4K services$144.75/svc6.85x markup
77334Radiation treatment devices, design and construction, complexโš  5.5x markup
$167.3K
1.3K services$124.48/svc5.54x markup
77414Radiation treatment delivery, three or more treatment areas
$162.7K
685 services$237.58/svc2.60x markup
77413Radiation treatment delivery, three or more treatment areas
$161.4K
766 services$210.70/svc2.51x markup
99205New patient office or other outpatient visit, typically 60 minutes
$149.8K
836 services$179.24/svc2.42x markup
77300Calculation of radiation therapy doseโš  5.8x markup
$98.5K
1.6K services$60.76/svc5.83x markup
99204New patient office or other outpatient visit, typically 45 minutes
$91.7K
619 services$148.21/svc2.33x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
G6015Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session9.1K$3.2M$350.807.36x
77014CT scan guidance for insertion of radiation therapy fields9.4K$980.3K$104.765.56x
77301Management of modulation radiotherapy planning538$974.4K$1.8K3.45x
77373Stereotactic body radiation therapy 1 or more lesions using imaging guidance845$960.0K$1.1K7.02x
G6012Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 6-10mev2.6K$630.3K$245.342.16x
G6013Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 11-19mev2.4K$594.3K$250.012.47x
77290Management of radiation therapy, simulation, complex1.2K$557.5K$472.052.49x
77427Radiation treatment management, 5 treatments3.3K$552.2K$165.226.27x
77418Intensity modulated radiation treatment delivery per session1.5K$546.4K$365.237.07x
77295Management of radiation therapy, 3D893$401.2K$449.319.45x
55874Injection of biodegradable material next to prostate100$311.8K$3.1K3.65x
77338Design and construction of device for radiation therapy639$291.3K$455.845.62x
77336Radiation therapy consultation per week3.6K$271.4K$76.324.36x
77263Management of radiation therapy, complex1.4K$196.3K$144.756.85x
77334Radiation treatment devices, design and construction, complex1.3K$167.3K$124.485.54x
77414Radiation treatment delivery, three or more treatment areas685$162.7K$237.582.60x
77413Radiation treatment delivery, three or more treatment areas766$161.4K$210.702.51x
99205New patient office or other outpatient visit, typically 60 minutes836$149.8K$179.242.42x
77300Calculation of radiation therapy dose1.6K$98.5K$60.765.83x
99204New patient office or other outpatient visit, typically 45 minutes619$91.7K$148.212.33x

Markup Analysis

Charge-to-Payment Ratio

5.51x

This provider submits charges 5.51 times higher than what Medicare actually pays.

What This Means

A markup ratio of 5.51x means for every $100 Medicare pays, this provider initially charges $551. This is higher than the national average.

Location

Fairfax, VA

Provider Verification

Always verify provider credentials and location before scheduling appointments. This data reflects Medicare payments and may not include all practice locations.

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Data Sources

  • โ€ข Centers for Medicare & Medicaid Services (CMS)
  • โ€ข Medicare Provider Utilization and Payment Data (2014-2023)
  • โ€ข National Plan and Provider Enumeration System (NPPES)

Last Updated: February 2026 (data through 2023, the latest CMS release)

Note: All data is from publicly available Medicare records. OpenMedicare is an independent journalism project not affiliated with CMS.

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