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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. William Warnick
❤️
MDIndividual

William Warnick, M.D.

NPI: 1710047790
West Chester, PA
10 years of data
Advanced Heart Failure and Transplant Cardiology
$3.8M
Total Payments
41.0K
Beneficiaries
49.6K
Services
3.34x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$3.8M
Specialty median$83.5K

📋 Key Findings

1Billed $3.8M over 10 years
23.34x markup ratio (above median)
399th percentile in Advanced Heart Failure and Transplant Cardiology by payments
48 procedures with >3x markup
✓ No flags detected

🔎 Data Analysis

This provider's $3.8M in total Medicare payments ranks in the 99th percentile of Advanced Heart Failure and Transplant Cardiology providers nationally.

Medicare payments to this provider grew 90% from 2014 to 2023.

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$289.69$72.254.01x$217.44$314.4K4.9K3.9K
2015$275.29$67.724.07x$207.57$309.0K4.6K3.5K
2016$321.04$87.663.66x$233.38$336.9K4.4K3.5K
2017$324.32$92.903.49x$231.42$302.8K4.1K3.3K
2018$337.13$93.053.62x$244.08$317.7K4.4K3.5K
2019$370.66$100.643.68x$270.02$424.1K5.8K4.9K
2020$480.91$145.753.30x$335.16$367.6K4.7K4.1K
2021$477.73$142.433.35x$335.30$387.0K4.7K3.9K
2022$602.87$181.753.32x$421.12$425.8K5.9K4.9K
2023$555.52$168.943.29x$386.58$598.4K6.1K5.4K

Top Procedures (20)

99214Established patient office or other outpatient, visit typically 25 minutes
$1.3M
14.2K services$90.61/svc1.85x markup
78452Nuclear medicine study of vessels of heart using drugs or exercise multiple studies⚠ 4.3x markup
$482.9K
1.2K services$399.40/svc4.31x markup
93306Ultrasound examination of heart including color-depicted blood flow rate, direction, and valve function⚠ 7.9x markup
$399.9K
3.1K services$128.54/svc7.92x markup
99215Established patient office or other outpatient, visit typically 40 minutes
$285.1K
2.2K services$129.82/svc1.76x markup
78431Nuclear medicine studies of blood flow in heart muscle at rest and with stress with concurrent ct scan⚠ 3.6x markup
$203.8K
98 services$2.1K/svc3.61x markup
93000Routine EKG using at least 12 leads including interpretation and report⚠ 7.0x markup
$122.8K
9.6K services$12.84/svc7.01x markup
99222Initial hospital inpatient care, typically 50 minutes per day
$113.8K
1.0K services$113.39/svc1.90x markup
99232Subsequent hospital inpatient care, typically 25 minutes per day
$110.4K
1.8K services$60.45/svc2.07x markup
A9555Rubidium rb-82, diagnostic, per study dose, up to 60 millicuries
$92.6K
149 services$621.71/svc1.27x markup
93015Exercise or drug-induced heart and blood vessel stress test with EKG monitoring, physician supervision, interpretation, and report⚠ 5.5x markup
$80.1K
1.5K services$54.84/svc5.47x markup
93229Heart rhythm tracing, computer analysis, physician prescribed transmission of patient-triggered events greater than 24-hour EKG up to 30 days⚠ 3.4x markup
$72.6K
111 services$654.26/svc3.36x markup
99213Established patient office or other outpatient visit, typically 15 minutes
$69.4K
1.2K services$57.58/svc2.01x markup
99204New patient office or other outpatient visit, typically 45 minutes
$67.7K
511 services$132.53/svc1.97x markup
78492Multiple nuclear medicine studies of blood flow in heart muscle at rest and with stress⚠ 3.5x markup
$65.3K
48 services$1.4K/svc3.45x markup
A9502Technetium tc-99m tetrofosmin, diagnostic, per study dose
$59.5K
1.2K services$50.25/svc1.28x markup
93010Routine electrocardiogram (EKG) using at least 12 leads with interpretation and report⚠ 7.6x markup
$48.7K
7.0K services$6.99/svc7.58x markup
99223Initial hospital inpatient care, typically 70 minutes per day
$37.8K
230 services$164.26/svc1.98x markup
99203New patient office or other outpatient visit, typically 30 minutes
$26.7K
315 services$84.61/svc2.33x markup
99233Subsequent hospital inpatient care, typically 35 minutes per day
$25.5K
290 services$87.80/svc1.88x markup
J2785Injection, regadenoson, 0.1 mg
$20.4K
530 services$38.50/svc1.28x markup
Show detailed table ▾
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
99214Established patient office or other outpatient, visit typically 25 minutes14.2K$1.3M$90.611.85x
78452Nuclear medicine study of vessels of heart using drugs or exercise multiple studies1.2K$482.9K$399.404.31x
93306Ultrasound examination of heart including color-depicted blood flow rate, direction, and valve function3.1K$399.9K$128.547.92x
99215Established patient office or other outpatient, visit typically 40 minutes2.2K$285.1K$129.821.76x
78431Nuclear medicine studies of blood flow in heart muscle at rest and with stress with concurrent ct scan98$203.8K$2.1K3.61x
93000Routine EKG using at least 12 leads including interpretation and report9.6K$122.8K$12.847.01x
99222Initial hospital inpatient care, typically 50 minutes per day1.0K$113.8K$113.391.90x
99232Subsequent hospital inpatient care, typically 25 minutes per day1.8K$110.4K$60.452.07x
A9555Rubidium rb-82, diagnostic, per study dose, up to 60 millicuries149$92.6K$621.711.27x
93015Exercise or drug-induced heart and blood vessel stress test with EKG monitoring, physician supervision, interpretation, and report1.5K$80.1K$54.845.47x
93229Heart rhythm tracing, computer analysis, physician prescribed transmission of patient-triggered events greater than 24-hour EKG up to 30 days111$72.6K$654.263.36x
99213Established patient office or other outpatient visit, typically 15 minutes1.2K$69.4K$57.582.01x
99204New patient office or other outpatient visit, typically 45 minutes511$67.7K$132.531.97x
78492Multiple nuclear medicine studies of blood flow in heart muscle at rest and with stress48$65.3K$1.4K3.45x
A9502Technetium tc-99m tetrofosmin, diagnostic, per study dose1.2K$59.5K$50.251.28x
93010Routine electrocardiogram (EKG) using at least 12 leads with interpretation and report7.0K$48.7K$6.997.58x
99223Initial hospital inpatient care, typically 70 minutes per day230$37.8K$164.261.98x
99203New patient office or other outpatient visit, typically 30 minutes315$26.7K$84.612.33x
99233Subsequent hospital inpatient care, typically 35 minutes per day290$25.5K$87.801.88x
J2785Injection, regadenoson, 0.1 mg530$20.4K$38.501.28x

Markup Analysis

Charge-to-Payment Ratio

3.34x

This provider submits charges 3.34 times higher than what Medicare actually pays.

What This Means

A markup ratio of 3.34x means for every $100 Medicare pays, this provider initially charges $334. This is higher than the national average.

Location

West Chester, PA

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.

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