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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. Sergio Sanchez-Zambrano
🩺
MDI

Sergio Sanchez-Zambrano, MD

NPI: 1073596441
Houston, TX
10 years of data
Internal Medicine
$191.8K
Total Payments
1.1K
Beneficiaries
3.0K
Services
1.73x
Markup Ratio

Peer Comparison

78th
percentile in specialty
This provider$191.8K
Specialty median$84.0K

📋 Key Findings

1Billed $191.8K over 10 years
21.73x markup ratio
3AI fraud probability: 87.1%
🤖

AI Risk Assessment

Rank #478 of 500
87.1%fraud probability
Low riskMediumHigh risk

Risk Factors

Matches confirmed fraud profile

What this means

Our machine learning model analyzed billing patterns, service volumes, markup ratios, and peer comparisons to estimate a 87.1% probability that this provider's billing patterns are consistent with known fraud cases. This is ranked #478 out of 500 highest-risk providers analyzed. This is a statistical prediction, not a determination of fraud.

View all ML-flagged providers →Methodology →

ML model prediction — not an accusation of fraud

🔎 Data Analysis

This provider's $191.8K in total Medicare payments ranks in the 78th percentile of Internal Medicine providers nationally.

Medicare payments to this provider grew 127% from 2014 to 2023.

AI-generated analysis based on Medicare payment data.

Annual Medicare Payments

Annual Services Provided

Avg Payment per Service

Top Procedures (10)

99213Office visit, established patient, low complexity
$42.1K
563 services$74.78/svc1.52x markup
99214Office visit, established patient, moderate complexity
$37.9K
507 services$74.74/svc1.64x markup
99215Office visit, established patient, high complexity
$33.7K
450 services$74.85/svc1.60x markup
99232Subsequent hospital care, moderate complexity
$29.5K
394 services$74.80/svc2.07x markup
99233Subsequent hospital care, high complexity
$25.3K
338 services$74.74/svc1.61x markup
93000Electrocardiogram, complete
$21.1K
282 services$74.65/svc2.03x markup
71046Chest X-ray, 2 views
$16.8K
225 services$74.85/svc1.76x markup
80053Comprehensive metabolic panel
$12.6K
169 services$74.74/svc1.80x markup
85025Complete blood count with differential
$8.4K
113 services$74.52/svc1.63x markup
36415Venipuncture for blood draw
$4.2K
56 services$75.18/svc1.58x markup
Show detailed table ▾
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
99213Office visit, established patient, low complexity563$42.1K$74.781.52x
99214Office visit, established patient, moderate complexity507$37.9K$74.741.64x
99215Office visit, established patient, high complexity450$33.7K$74.851.60x
99232Subsequent hospital care, moderate complexity394$29.5K$74.802.07x
99233Subsequent hospital care, high complexity338$25.3K$74.741.61x
93000Electrocardiogram, complete282$21.1K$74.652.03x
71046Chest X-ray, 2 views225$16.8K$74.851.76x
80053Comprehensive metabolic panel169$12.6K$74.741.80x
85025Complete blood count with differential113$8.4K$74.521.63x
36415Venipuncture for blood draw56$4.2K$75.181.58x

Markup Analysis

Charge-to-Payment Ratio

1.73x

This provider submits charges 1.73 times higher than what Medicare actually pays.

What This Means

A markup ratio of 1.73x means for every $100 Medicare pays, this provider initially charges $173. This is lower than the national average.

Location

Houston, TX

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 Internal Medicine providers in TX for peer comparison.

Sergio Sanchez-Zambrano (you)
$191.8K
Owen Ellington, M.D, J.D.
$34.4M
Show detailed table ▾
ProviderLocationTotal PaymentsStatus
Owen Ellington, M.D, J.D.Humble, TX$34.4M✓ Clear

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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