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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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Methodology•Download Data
  1. Home
  2. Providers
  3. Mason City Ambulatory Surgery Center , Llc
🔪
Organization

Mason City Ambulatory Surgery Center , Llc

NPI: 1902841398
Mason City, IA
10 years of data
Ambulatory Surgical Center
$20.2M
Total Payments
29.0K
Beneficiaries
37.6K
Services
8.57x
Markup Ratio

Peer Comparison

98th
percentile in specialty
This provider$20.2M
Specialty median$657.1K

📋 Key Findings

1Billed $20.2M over 10 years
28.57x markup ratio (above median)
398th percentile in Ambulatory Surgical Center by payments
420 procedures with >3x markup
✓ No flags detected

🔎 Data Analysis

This provider's $20.2M in total Medicare payments ranks in the 98th percentile of Ambulatory Surgical Center providers nationally.

Their average markup ratio of 8.57x is significantly above the specialty median of 6.1x.

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 — the gap represents the markup.

YearAvg SubmittedAvg PaidMarkup RatioGap per ServiceTotal PaymentsServicesBeneficiaries
2014$3.9K$560.886.92x$3.3K$1.5M2.8K2.2K
2015$3.9K$562.737.01x$3.4K$1.9M3.5K2.8K
2016$3.9K$548.057.05x$3.3K$1.9M3.9K2.9K
2017$3.9K$511.517.55x$3.4K$2.1M4.3K3.3K
2018$4.0K$551.937.21x$3.4K$2.0M4.2K3.2K
2019$4.2K$527.008.06x$3.7K$2.1M4.3K3.3K
2020$4.7K$643.177.25x$4.0K$1.9M3.6K2.8K
2021$5.6K$796.637.05x$4.8K$2.6M3.9K3.0K
2022$6.1K$891.296.84x$5.2K$2.3M3.7K2.9K
2023$6.3K$849.857.36x$5.4K$2.1M3.4K2.7K

Top Procedures (20)

66984Removal of cataract with insertion of lens⚠ 10.2x markup
$7.1M
10.1K services$706.05/svc10.24x markup
45385Removal of polyps or growths of large bowel using an endoscope⚠ 8.9x markup
$1.6M
4.5K services$350.00/svc8.86x markup
66982Removal of cataract with insertion of lens⚠ 10.4x markup
$1.2M
1.7K services$708.42/svc10.36x markup
27447Repair of knee joint, lower or upper part of joint, inside and outside area⚠ 7.0x markup
$814.1K
127 services$6.4K/svc6.97x markup
64635Destruction of lower or sacral spinal facet joint nerves using imaging guidance⚠ 4.3x markup
$655.0K
1.2K services$568.55/svc4.28x markup
0191TInternal insertion of eye fluid drainage device⚠ 3.2x markup
$548.9K
284 services$1.9K/svc3.20x markup
C9740Cystourethroscopy, with insertion of transprostatic implant; 4 or more implants⚠ 6.1x markup
$509.4K
99 services$5.1K/svc6.10x markup
52356Crushing of stone in urinary duct (ureter) with stent using an endoscope⚠ 6.2x markup
$472.1K
348 services$1.4K/svc6.21x markup
29827Repair of shoulder rotator cuff using an endoscope⚠ 4.8x markup
$380.0K
198 services$1.9K/svc4.78x markup
43239Biopsy of the esophagus, stomach, and/or upper small bowel using an endoscope⚠ 12.7x markup
$357.5K
1.6K services$219.31/svc12.71x markup
G0105Colorectal cancer screening; colonoscopy on individual at high risk⚠ 8.3x markup
$351.7K
1.0K services$347.85/svc8.34x markup
64721Release and/or relocation of median nerve of hand⚠ 6.7x markup
$332.6K
605 services$549.77/svc6.67x markup
64493Injections of lower or sacral spine facet joint using imaging guidance⚠ 8.6x markup
$319.9K
1.4K services$229.02/svc8.60x markup
52332Insertion of stent in urinary duct (ureter) using an endoscope⚠ 5.3x markup
$301.5K
416 services$724.84/svc5.33x markup
52601Electro-removal of prostate through bladder canal (urethra) with control of bleeding using an endoscope⚠ 4.9x markup
$271.7K
208 services$1.3K/svc4.94x markup
62323Injection of substance into spinal canal of lower back or sacrum using imaging guidance⚠ 10.3x markup
$269.0K
1.3K services$207.88/svc10.31x markup
64483Injections of anesthetic and/or steroid drug into lower or sacral spine nerve root using imaging guidance⚠ 7.8x markup
$246.7K
1.0K services$244.72/svc7.77x markup
G0121Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk⚠ 8.5x markup
$234.5K
695 services$337.41/svc8.50x markup
45380Biopsy of large bowel using an endoscope⚠ 12.1x markup
$210.9K
843 services$250.15/svc12.08x markup
52240Destruction and/or removal of large growths of the bladder using an endoscope⚠ 5.1x markup
$208.3K
166 services$1.3K/svc5.13x markup
Show detailed table ▾
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
66984Removal of cataract with insertion of lens10.1K$7.1M$706.0510.24x
45385Removal of polyps or growths of large bowel using an endoscope4.5K$1.6M$350.008.86x
66982Removal of cataract with insertion of lens1.7K$1.2M$708.4210.36x
27447Repair of knee joint, lower or upper part of joint, inside and outside area127$814.1K$6.4K6.97x
64635Destruction of lower or sacral spinal facet joint nerves using imaging guidance1.2K$655.0K$568.554.28x
0191TInternal insertion of eye fluid drainage device284$548.9K$1.9K3.20x
C9740Cystourethroscopy, with insertion of transprostatic implant; 4 or more implants99$509.4K$5.1K6.10x
52356Crushing of stone in urinary duct (ureter) with stent using an endoscope348$472.1K$1.4K6.21x
29827Repair of shoulder rotator cuff using an endoscope198$380.0K$1.9K4.78x
43239Biopsy of the esophagus, stomach, and/or upper small bowel using an endoscope1.6K$357.5K$219.3112.71x
G0105Colorectal cancer screening; colonoscopy on individual at high risk1.0K$351.7K$347.858.34x
64721Release and/or relocation of median nerve of hand605$332.6K$549.776.67x
64493Injections of lower or sacral spine facet joint using imaging guidance1.4K$319.9K$229.028.60x
52332Insertion of stent in urinary duct (ureter) using an endoscope416$301.5K$724.845.33x
52601Electro-removal of prostate through bladder canal (urethra) with control of bleeding using an endoscope208$271.7K$1.3K4.94x
62323Injection of substance into spinal canal of lower back or sacrum using imaging guidance1.3K$269.0K$207.8810.31x
64483Injections of anesthetic and/or steroid drug into lower or sacral spine nerve root using imaging guidance1.0K$246.7K$244.727.77x
G0121Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk695$234.5K$337.418.50x
45380Biopsy of large bowel using an endoscope843$210.9K$250.1512.08x
52240Destruction and/or removal of large growths of the bladder using an endoscope166$208.3K$1.3K5.13x

Markup Analysis

Charge-to-Payment Ratio

8.57x

This provider submits charges 8.57 times higher than what Medicare actually pays.

What This Means

A markup ratio of 8.57x means for every $100 Medicare pays, this provider initially charges $857. This is higher than the national average.

Location

Mason City, IA

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

  • • Centers for Medicare & Medicaid Services (CMS)
  • • Medicare Provider Utilization and Payment Data (2014-2023)
  • • 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