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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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ยฉ 2026 OpenMedicare. Independent data journalism. Built by TheDataProject.ai

Methodologyโ€ขDownload Data
  1. Home
  2. Providers
  3. Constantine Mantz
๐ŸŽ—๏ธ
MDIndividual

Constantine Mantz, MD

NPI: 1396743290
Cape Coral, FL
10 years of data
Radiation Oncology
$33.8M
Total Payments
313
Beneficiaries
193.6K
Services
5.11x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$33.8M
Specialty median$300.5K
Rank #5 of 5 in specialty

๐Ÿ“‹ Key Findings

1Billed $33.8M over 10 years
25.11x markup ratio (above median)
399th percentile in Radiation Oncology by payments
477 services/day โ€” unusually high
5Payments surged 62% in 2022
619 procedures with >3x markup

This provider averages 77 services per working day

Based on 193.6K total services over 10 years (250 working days/year). Learn about impossible service volumes โ†’

๐Ÿ”Ž Data Analysis

This provider's $33.8M in total Medicare payments ranks in the 99th percentile of Radiation Oncology providers nationally.

Their average markup ratio of 5.11x is significantly above the specialty median of 5.0x.

Averaging 77 services per working day raises questions about billing patterns.

AI-generated analysis based on Medicare payment data.

Annual Medicare Payments

Annual Services Provided

Avg Payment per Service

Markup Ratio Over Time

๐Ÿ“ˆ

Notable: Payments increased 62% in 2022

Year-over-year payment surges can indicate changes in practice volume, new services, or billing pattern shifts.

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$609.48$141.744.30x$467.74$4.1M29.3K36
2015$473.39$108.314.37x$365.08$3.9M36.3K40
2016$863.23$190.724.53x$672.51$3.6M18.9K36
2017$1.1K$193.535.44x$858.90$3.1M16.2K30
2018$1.1K$200.565.34x$871.16$2.8M14.0K24
2019$1.0K$186.295.61x$858.50$3.1M16.8K31
2020$1.1K$193.175.65x$898.26$3.1M15.9K25
2021$1.0K$180.585.67x$842.68$2.4M13.1K28
2022$1.3K$242.165.42x$1.1K$3.8M15.9K30
2023$1.2K$218.125.40x$959.07$3.8M17.2K33

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  6.4x markup
$8.8M
30.2K services$292.74/svc6.37x markup
78815Nuclear medicine study from skull base to mid-thigh with ct scanโš  3.2x markup
$3.2M
2.9K services$1.1K/svc3.20x markup
77014Ct guidance for insertion of radiation therapy fieldsโš  7.0x markup
$3.0M
30.9K services$97.61/svc7.01x markup
77301High precision radiation therapy planningโš  4.8x markup
$3.0M
1.9K services$1.5K/svc4.76x markup
77373Cranial lesion surgery using radiation over multiple sessionsโš  5.7x markup
$2.7M
2.7K services$993.48/svc5.70x markup
77300Calculation of radiation therapy doseโš  4.3x markup
$1.5M
27.3K services$53.57/svc4.30x markup
77418Intensity modulated radiation treatment delivery per sessionโš  5.3x markup
$1.2M
3.7K services$319.38/svc5.26x markup
77427Radiation treatment management, 5 treatment sessionsโš  4.1x markup
$1.2M
7.5K services$154.79/svc4.12x markup
G6012Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 6-10 mevโš  4.2x markup
$1.1M
5.2K services$201.04/svc4.15x markup
A9552Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries
$956.4K
2.6K services$367.71/svc2.47x markup
77338Design and construction of radiation treatment device for high precision radiation therapyโš  4.3x markup
$815.7K
2.0K services$399.27/svc4.26x markup
78816Nuclear medicine study with CT imaging whole bodyโš  3.4x markup
$806.7K
768 services$1.1K/svc3.44x markup
A9595Piflufolastat f-18, diagnostic, 1 millicurieโš  3.9x markup
$713.5K
1.5K services$465.72/svc3.92x markup
A9596Gallium ga-68 gozetotide, diagnostic, (illuccix), 1 millicurieโš  4.6x markup
$618.1K
984 services$628.19/svc4.56x markup
77336Continuing radiation therapy consultation per weekโš  3.8x markup
$590.9K
9.0K services$65.55/svc3.77x markup
77290Obtaining data needed to develop the optimal radiation treatment, 3 or more treatment areas or any number of treatment areas where special treatment is involvedโš  4.6x markup
$439.0K
1.1K services$395.48/svc4.60x markup
77334Design and construction of complex radiation treatment deviceโš  5.0x markup
$376.2K
3.5K services$107.42/svc5.04x markup
77280Obtaining data needed to develop the optimal radiation treatment, 1 treatment areaโš  3.3x markup
$353.6K
1.6K services$218.84/svc3.27x markup
77263Complex radiation therapy planningโš  4.4x markup
$315.1K
2.3K services$134.96/svc4.36x markup
77435Management of cranial lesion surgery using radiation over multiple sessionsโš  4.7x markup
$242.9K
460 services$527.97/svc4.74x 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 session30.2K$8.8M$292.746.37x
78815Nuclear medicine study from skull base to mid-thigh with ct scan2.9K$3.2M$1.1K3.20x
77014Ct guidance for insertion of radiation therapy fields30.9K$3.0M$97.617.01x
77301High precision radiation therapy planning1.9K$3.0M$1.5K4.76x
77373Cranial lesion surgery using radiation over multiple sessions2.7K$2.7M$993.485.70x
77300Calculation of radiation therapy dose27.3K$1.5M$53.574.30x
77418Intensity modulated radiation treatment delivery per session3.7K$1.2M$319.385.26x
77427Radiation treatment management, 5 treatment sessions7.5K$1.2M$154.794.12x
G6012Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 6-10 mev5.2K$1.1M$201.044.15x
A9552Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries2.6K$956.4K$367.712.47x
77338Design and construction of radiation treatment device for high precision radiation therapy2.0K$815.7K$399.274.26x
78816Nuclear medicine study with CT imaging whole body768$806.7K$1.1K3.44x
A9595Piflufolastat f-18, diagnostic, 1 millicurie1.5K$713.5K$465.723.92x
A9596Gallium ga-68 gozetotide, diagnostic, (illuccix), 1 millicurie984$618.1K$628.194.56x
77336Continuing radiation therapy consultation per week9.0K$590.9K$65.553.77x
77290Obtaining data needed to develop the optimal radiation treatment, 3 or more treatment areas or any number of treatment areas where special treatment is involved1.1K$439.0K$395.484.60x
77334Design and construction of complex radiation treatment device3.5K$376.2K$107.425.04x
77280Obtaining data needed to develop the optimal radiation treatment, 1 treatment area1.6K$353.6K$218.843.27x
77263Complex radiation therapy planning2.3K$315.1K$134.964.36x
77435Management of cranial lesion surgery using radiation over multiple sessions460$242.9K$527.974.74x

Markup Analysis

Charge-to-Payment Ratio

5.11x

This provider submits charges 5.11 times higher than what Medicare actually pays.

What This Means

A markup ratio of 5.11x means for every $100 Medicare pays, this provider initially charges $511. This is higher than the national average.

Location

Cape Coral, FL

Provider Verification

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

Similar Providers

Other Radiation Oncology providers in FL for peer comparison.

Constantine Mantz (you)
$33.8M
Timothy Kerwin, MD
$42.2M
Scot Ackerman, MD
$37.7M
Show detailed table โ–พ
ProviderLocationTotal PaymentsStatus
Timothy Kerwin, MDNaples, FL$42.2Mโœ“ Clear
Scot Ackerman, MDJacksonville, FL$37.7Mโœ“ Clear

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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.

Believe this data is inaccurate? Dispute this data