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Data Sources: Centers for Medicare & Medicaid Services (CMS), Medicare Provider Utilization and Payment Data
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Methodology•Download Data
  1. Home
  2. Providers
  3. Erwin Grussie
🎗️
MDI

Erwin Grussie, MD

NPI: 1679917561
Los Angeles, CA
10 years of data
Medical Oncology
$644.5K
Total Payments
5.7K
Beneficiaries
18.2K
Services
3.38x
Markup Ratio

Peer Comparison

80th
percentile in specialty
This provider$644.5K
Specialty median$262.8K

📋 Key Findings

1Billed $644.5K over 10 years
23.38x markup ratio (above median)
3AI fraud probability: 90.1%
48 procedures with >3x markup
🤖

AI Risk Assessment

Rank #180 of 500
90.1%fraud probability
Low riskMediumHigh risk

Risk Factors

High markup ratio
Extreme markup

What this means

Our machine learning model analyzed billing patterns, service volumes, markup ratios, and peer comparisons to estimate a 90.1% probability that this provider's billing patterns are consistent with known fraud cases. This is ranked #180 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 $644.5K in total Medicare payments ranks in the 80th percentile of Medical Oncology providers nationally.

Medicare payments to this provider grew 98% 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⚠ 3.6x markup
$137.5K
3.3K services$41.34/svc3.63x markup
99214Office visit, established patient, moderate complexity⚠ 3.7x markup
$123.8K
3.0K services$41.35/svc3.74x markup
99215Office visit, established patient, high complexity
$110.0K
2.7K services$41.35/svc2.71x markup
99232Subsequent hospital care, moderate complexity⚠ 3.4x markup
$96.3K
2.3K services$41.34/svc3.40x markup
99233Subsequent hospital care, high complexity
$82.5K
2.0K services$41.35/svc2.75x markup
93000Electrocardiogram, complete⚠ 3.5x markup
$68.8K
1.7K services$41.35/svc3.48x markup
71046Chest X-ray, 2 views⚠ 3.1x markup
$55.0K
1.3K services$41.34/svc3.11x markup
80053Comprehensive metabolic panel⚠ 3.5x markup
$41.3K
998 services$41.35/svc3.50x markup
85025Complete blood count with differential⚠ 4.0x markup
$27.5K
665 services$41.37/svc4.02x markup
36415Venipuncture for blood draw⚠ 3.4x markup
$13.8K
333 services$41.30/svc3.41x markup
Show detailed table ▾
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
99213Office visit, established patient, low complexity3.3K$137.5K$41.343.63x
99214Office visit, established patient, moderate complexity3.0K$123.8K$41.353.74x
99215Office visit, established patient, high complexity2.7K$110.0K$41.352.71x
99232Subsequent hospital care, moderate complexity2.3K$96.3K$41.343.40x
99233Subsequent hospital care, high complexity2.0K$82.5K$41.352.75x
93000Electrocardiogram, complete1.7K$68.8K$41.353.48x
71046Chest X-ray, 2 views1.3K$55.0K$41.343.11x
80053Comprehensive metabolic panel998$41.3K$41.353.50x
85025Complete blood count with differential665$27.5K$41.374.02x
36415Venipuncture for blood draw333$13.8K$41.303.41x

Markup Analysis

Charge-to-Payment Ratio

3.38x

This provider submits charges 3.38 times higher than what Medicare actually pays.

What This Means

A markup ratio of 3.38x means for every $100 Medicare pays, this provider initially charges $338. This is higher than the national average.

Location

Los Angeles, CA

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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