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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. William Cook
๐Ÿงด
MDIndividual

William Cook, MD

NPI: 1639100100
Charleston, SC
10 years of data
Micrographic Dermatologic Surgery
$18.2M
Total Payments
84.7K
Beneficiaries
102.4K
Services
5.3x
Markup Ratio

Peer Comparison

98th
percentile in specialty
This provider$18.2M
Specialty median$558.8K

๐Ÿ“‹ Key Findings

1Billed $18.2M over 10 years
25.3x markup ratio (above median)
398th percentile in Micrographic Dermatologic Surgery by payments
419 procedures with >3x markup
โœ“ No flags detected

๐Ÿ”Ž Data Analysis

This provider's $18.2M in total Medicare payments ranks in the 98th percentile of Micrographic Dermatologic Surgery providers nationally.

Their average markup ratio of 5.3x is significantly above the specialty median of 3.1x.

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 โ€” the gap represents the markup.

YearAvg SubmittedAvg PaidMarkup RatioGap per ServiceTotal PaymentsServicesBeneficiaries
2014$1.2K$192.106.14x$987.59$1.4M8.6K7.6K
2015$1.2K$214.475.76x$1.0K$1.6M8.6K7.3K
2016$1.4K$236.846.02x$1.2K$1.8M9.3K7.7K
2017$1.3K$228.425.87x$1.1K$1.9M10.5K8.8K
2018$1.2K$214.755.78x$1.0K$1.8M10.4K8.5K
2019$1.4K$233.196.02x$1.2K$1.8M10.9K8.5K
2020$1.4K$233.136.05x$1.2K$1.8M10.4K8.2K
2021$1.3K$225.235.96x$1.1K$2.1M11.6K9.6K
2022$1.4K$223.886.26x$1.2K$2.0M11.2K9.3K
2023$1.5K$233.286.48x$1.3K$2.0M10.9K9.2K

Top Procedures (20)

17311Removal and microscopic examination of growth of the head, neck, hands, feet, or genitals (first stage, up to 5 tissue blocks)โš  5.3x markup
$4.6M
13.8K services$333.07/svc5.35x markup
17312Removal and microscopic examination of growth of the head, neck, hands, feet, or genitalsโš  3.8x markup
$2.1M
7.4K services$289.13/svc3.75x markup
15260Relocation of patient skin to nose, ears, eyelids, and/or lips (20 sq centimeters or less)โš  5.5x markup
$1.6M
2.1K services$733.00/svc5.55x markup
17313Removal and microscopic examination of growth of the trunk, arms, or legs (first stage, up to 5 tissue blocks)โš  4.6x markup
$1.0M
2.9K services$360.29/svc4.57x markup
14060Tissue transfer repair of wound (10 sq centimeters or less) of eyelids, nose, ears, and/or lipsโš  5.7x markup
$930.3K
1.8K services$527.69/svc5.65x markup
13132Repair of wound (2.6 to 7.5 centimeters) of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, and/or feetโš  8.7x markup
$683.7K
3.8K services$179.07/svc8.70x markup
14301Tissue transfer repair of wound (30.1 to 60.0 sq centimeters)โš  5.6x markup
$607.8K
764 services$795.55/svc5.59x markup
14061Tissue transfer repair of wound (10.1 to 30.0 sq centimeters) of eyelids, nose, ears, and/or lipsโš  5.7x markup
$529.7K
732 services$723.67/svc5.66x markup
14041Tissue transfer repair of wound (10.1 to 30.0 sq centimeters) of the forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, and/or feetโš  5.4x markup
$525.9K
794 services$662.38/svc5.41x markup
99212Established patient office or other outpatient visit, typically 10 minutesโš  3.2x markup
$497.3K
16.7K services$29.75/svc3.22x markup
99213Established patient office or other outpatient visit, typically 15 minutes
$408.6K
6.9K services$59.09/svc2.82x markup
15240Relocation of patient skin to forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, and/or feet (20 sq centimeters or less)โš  5.8x markup
$373.9K
577 services$648.03/svc5.83x markup
12032Repair of wound (2.6 to 7.5 centimeters) of the scalp, underarms, trunk, arms, and/or legsโš  4.9x markup
$294.0K
2.2K services$133.51/svc4.92x markup
17110Destruction of up to 14 skin growthsโš  3.5x markup
$272.2K
3.8K services$71.36/svc3.53x markup
15576Creation of flap graft to eyelids, nose, ears, lips, or mouthโš  7.9x markup
$261.1K
456 services$572.53/svc7.90x markup
15630Transfer of skin flap to eyelids, nose, ears, or lipsโš  7.8x markup
$193.6K
596 services$324.80/svc7.76x markup
88331Pathology examination of tissue during surgeryโš  5.4x markup
$189.6K
2.5K services$74.62/svc5.37x markup
11102Tangential biopsy of single skin lesionโš  7.3x markup
$187.0K
3.6K services$52.10/svc7.32x markup
17314Removal and microscopic examination of growth of the trunk, arms, or legsโš  3.6x markup
$171.3K
606 services$282.66/svc3.59x markup
15220Relocation of patient skin (20 sq centimeters or less) to scalp, arms, and/or legsโš  6.6x markup
$158.9K
315 services$504.59/svc6.63x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
17311Removal and microscopic examination of growth of the head, neck, hands, feet, or genitals (first stage, up to 5 tissue blocks)13.8K$4.6M$333.075.35x
17312Removal and microscopic examination of growth of the head, neck, hands, feet, or genitals7.4K$2.1M$289.133.75x
15260Relocation of patient skin to nose, ears, eyelids, and/or lips (20 sq centimeters or less)2.1K$1.6M$733.005.55x
17313Removal and microscopic examination of growth of the trunk, arms, or legs (first stage, up to 5 tissue blocks)2.9K$1.0M$360.294.57x
14060Tissue transfer repair of wound (10 sq centimeters or less) of eyelids, nose, ears, and/or lips1.8K$930.3K$527.695.65x
13132Repair of wound (2.6 to 7.5 centimeters) of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, and/or feet3.8K$683.7K$179.078.70x
14301Tissue transfer repair of wound (30.1 to 60.0 sq centimeters)764$607.8K$795.555.59x
14061Tissue transfer repair of wound (10.1 to 30.0 sq centimeters) of eyelids, nose, ears, and/or lips732$529.7K$723.675.66x
14041Tissue transfer repair of wound (10.1 to 30.0 sq centimeters) of the forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, and/or feet794$525.9K$662.385.41x
99212Established patient office or other outpatient visit, typically 10 minutes16.7K$497.3K$29.753.22x
99213Established patient office or other outpatient visit, typically 15 minutes6.9K$408.6K$59.092.82x
15240Relocation of patient skin to forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, and/or feet (20 sq centimeters or less)577$373.9K$648.035.83x
12032Repair of wound (2.6 to 7.5 centimeters) of the scalp, underarms, trunk, arms, and/or legs2.2K$294.0K$133.514.92x
17110Destruction of up to 14 skin growths3.8K$272.2K$71.363.53x
15576Creation of flap graft to eyelids, nose, ears, lips, or mouth456$261.1K$572.537.90x
15630Transfer of skin flap to eyelids, nose, ears, or lips596$193.6K$324.807.76x
88331Pathology examination of tissue during surgery2.5K$189.6K$74.625.37x
11102Tangential biopsy of single skin lesion3.6K$187.0K$52.107.32x
17314Removal and microscopic examination of growth of the trunk, arms, or legs606$171.3K$282.663.59x
15220Relocation of patient skin (20 sq centimeters or less) to scalp, arms, and/or legs315$158.9K$504.596.63x

Markup Analysis

Charge-to-Payment Ratio

5.3x

This provider submits charges 5.3 times higher than what Medicare actually pays.

What This Means

A markup ratio of 5.3x means for every $100 Medicare pays, this provider initially charges $530. This is higher than the national average.

Location

Charleston, SC

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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