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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. Ren Zhang
❤️
MDIndividual

Ren Zhang, M.D.

NPI: 1114909181
Abilene, TX
10 years of data
Cardiology
$3.5M
Total Payments
61.5K
Beneficiaries
124.4K
Services
4.1x
Markup Ratio

Peer Comparison

97th
percentile in specialty
This provider$3.5M
Specialty median$193.1K

📋 Key Findings

1Billed $3.5M over 10 years
24.1x markup ratio (above median)
397th percentile in Cardiology by payments
420 procedures with >3x markup
✓ No flags detected

🔎 Data Analysis

This provider's $3.5M in total Medicare payments ranks in the 97th percentile of Cardiology providers nationally.

This provider's billing patterns fall within normal ranges for their specialty.

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$163.00$50.493.23x$112.51$320.7K9.4K6.5K
2015$150.60$47.883.15x$102.72$350.1K12.3K6.1K
2016$151.60$47.253.21x$104.35$361.8K12.2K6.3K
2017$161.79$48.433.34x$113.36$363.2K12.0K6.2K
2018$155.54$46.723.33x$108.82$404.6K16.9K6.5K
2019$167.24$43.303.86x$123.94$399.1K15.5K6.7K
2020$331.77$44.447.47x$287.33$318.0K12.9K5.6K
2021$230.08$49.894.61x$180.19$320.1K10.5K5.1K
2022$222.47$47.264.71x$175.21$332.6K11.7K6.0K
2023$202.56$42.014.82x$160.55$323.8K11.1K6.4K

Top Procedures (20)

99214Established patient office or other outpatient, visit typically 25 minutes⚠ 3.8x markup
$717.7K
9.8K services$73.46/svc3.82x markup
93306Ultrasound examination of heart including color-depicted blood flow rate, direction, and valve function⚠ 4.0x markup
$571.0K
11.3K services$50.66/svc4.02x markup
99232Subsequent hospital inpatient care, typically 25 minutes per day⚠ 3.5x markup
$220.0K
4.0K services$55.61/svc3.53x markup
78452Nuclear medicine study of vessels of heart using drugs or exercise multiple studies⚠ 3.9x markup
$181.8K
3.1K services$57.80/svc3.91x markup
99223Initial hospital inpatient care, typically 70 minutes per day⚠ 3.6x markup
$179.0K
1.2K services$149.70/svc3.57x markup
85610Blood test, clotting time⚠ 4.7x markup
$176.9K
37.0K services$4.78/svc4.66x markup
99233Subsequent hospital inpatient care, typically 35 minutes per day⚠ 3.7x markup
$163.2K
2.0K services$81.01/svc3.66x markup
93793Anti-clotting management for patient taking warfarin⚠ 4.5x markup
$161.5K
20.2K services$8.01/svc4.50x markup
93312Insertion of probe in esophagus for heart ultrasound examination including interpretation and report⚠ 4.7x markup
$147.6K
1.7K services$84.96/svc4.65x markup
75574CT scan of heart blood vessels and grafts with contrast dye⚠ 5.0x markup
$132.1K
1.5K services$89.59/svc5.00x markup
99215Established patient office or other outpatient, visit typically 40 minutes⚠ 3.6x markup
$100.8K
922 services$109.29/svc3.62x markup
99213Established patient office or other outpatient visit, typically 15 minutes⚠ 4.0x markup
$95.0K
2.0K services$46.81/svc4.05x markup
99204New patient office or other outpatient visit, typically 45 minutes⚠ 4.0x markup
$55.0K
490 services$112.19/svc4.04x markup
93880Ultrasound scanning of blood flow (outside the brain) on both sides of head and neck⚠ 5.6x markup
$53.6K
1.9K services$28.04/svc5.56x markup
93016Exercise or drug-induced heart and blood vessel stress test with EKG monitoring and physician supervision⚠ 3.7x markup
$51.8K
3.2K services$16.37/svc3.72x markup
93355Insertion of probe in esophagus for heart ultrasound examination during procedure on heart or great blood vessel via catheter⚠ 4.2x markup
$50.4K
294 services$171.26/svc4.16x markup
93018Exercise or drug-induced heart and blood vessel stress test with EKG monitoring, physician interpretation and report⚠ 3.8x markup
$42.9K
3.9K services$10.94/svc3.82x markup
92960External shock to heart to regulate heart beat⚠ 3.7x markup
$40.6K
475 services$85.44/svc3.72x markup
93000Routine EKG using at least 12 leads including interpretation and report⚠ 4.3x markup
$38.3K
3.5K services$11.08/svc4.33x markup
99222Initial hospital inpatient care, typically 50 minutes per day⚠ 4.0x markup
$30.9K
296 services$104.39/svc4.03x markup
Show detailed table ▾
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
99214Established patient office or other outpatient, visit typically 25 minutes9.8K$717.7K$73.463.82x
93306Ultrasound examination of heart including color-depicted blood flow rate, direction, and valve function11.3K$571.0K$50.664.02x
99232Subsequent hospital inpatient care, typically 25 minutes per day4.0K$220.0K$55.613.53x
78452Nuclear medicine study of vessels of heart using drugs or exercise multiple studies3.1K$181.8K$57.803.91x
99223Initial hospital inpatient care, typically 70 minutes per day1.2K$179.0K$149.703.57x
85610Blood test, clotting time37.0K$176.9K$4.784.66x
99233Subsequent hospital inpatient care, typically 35 minutes per day2.0K$163.2K$81.013.66x
93793Anti-clotting management for patient taking warfarin20.2K$161.5K$8.014.50x
93312Insertion of probe in esophagus for heart ultrasound examination including interpretation and report1.7K$147.6K$84.964.65x
75574CT scan of heart blood vessels and grafts with contrast dye1.5K$132.1K$89.595.00x
99215Established patient office or other outpatient, visit typically 40 minutes922$100.8K$109.293.62x
99213Established patient office or other outpatient visit, typically 15 minutes2.0K$95.0K$46.814.05x
99204New patient office or other outpatient visit, typically 45 minutes490$55.0K$112.194.04x
93880Ultrasound scanning of blood flow (outside the brain) on both sides of head and neck1.9K$53.6K$28.045.56x
93016Exercise or drug-induced heart and blood vessel stress test with EKG monitoring and physician supervision3.2K$51.8K$16.373.72x
93355Insertion of probe in esophagus for heart ultrasound examination during procedure on heart or great blood vessel via catheter294$50.4K$171.264.16x
93018Exercise or drug-induced heart and blood vessel stress test with EKG monitoring, physician interpretation and report3.9K$42.9K$10.943.82x
92960External shock to heart to regulate heart beat475$40.6K$85.443.72x
93000Routine EKG using at least 12 leads including interpretation and report3.5K$38.3K$11.084.33x
99222Initial hospital inpatient care, typically 50 minutes per day296$30.9K$104.394.03x

Markup Analysis

Charge-to-Payment Ratio

4.1x

This provider submits charges 4.1 times higher than what Medicare actually pays.

What This Means

A markup ratio of 4.1x means for every $100 Medicare pays, this provider initially charges $410. This is higher than the national average.

Location

Abilene, TX

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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