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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. Arash Horizon
⚕️
MDIndividual

Arash Horizon, M.D.

NPI: 1881694131
Los Angeles, CA
10 years of data
Rheumatology
$45.0M
Total Payments
658
Beneficiaries
2.5M
Services
2.81x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$45.0M
Specialty median$352.6K
Rank #11 of 32 in specialty

📋 Key Findings

1Billed $45.0M over 10 years
22.81x markup ratio (above median)
399th percentile in Rheumatology by payments
41.0K services/day — physically implausible
58 procedures with >3x markup

⚠️ This provider averages 1.0K services per working day — physically unusual for an individual practitioner

Based on 2.5M total services over 10 years (250 working days/year). Learn about impossible service volumes →

🔎 Data Analysis

This provider's $45.0M in total Medicare payments ranks in the 99th percentile of Rheumatology providers nationally.

Averaging 1.0K services per working day raises questions about billing patterns.

Medicare payments to this provider grew 100% 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$55.12$20.552.68x$34.57$2.4M117.3K58
2015$51.19$20.782.46x$30.41$2.6M126.1K59
2016$63.65$26.272.42x$37.38$3.5M132.5K55
2017$51.90$21.982.36x$29.92$4.6M207.3K61
2018$51.54$20.752.48x$30.79$5.4M260.2K65
2019$58.53$19.962.93x$38.57$5.3M266.2K69
2020$58.93$20.092.93x$38.84$6.2M309.3K73
2021$56.27$18.733.00x$37.54$6.0M320.9K77
2022$39.78$12.203.26x$27.58$4.2M341.2K73
2023$35.87$11.233.19x$24.64$4.8M428.9K68

Top Procedures (20)

J3357Ustekinumab, for subcutaneous injection, 1 mg
$11.1M
77.7K services$142.74/svc2.85x markup
J1745Injection, infliximab, excludes biosimilar, 10 mg⚠ 3.1x markup
$4.5M
92.6K services$48.31/svc3.15x markup
J0717Injection, certolizumab pegol, 1 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered)
$4.4M
832.5K services$5.33/svc2.08x markup
J2357Injection, omalizumab, 5 mg
$3.7M
138.8K services$26.56/svc1.44x markup
J9312Injection, rituximab, 10 mg⚠ 3.1x markup
$1.7M
23.4K services$70.87/svc3.06x markup
J0129Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered)
$1.6M
41.7K services$38.41/svc2.07x markup
J9310Injection, rituximab, 100 mg
$1.4M
2.4K services$611.84/svc2.33x markup
J0897Injection, denosumab, 1 mg
$1.3M
91.1K services$14.45/svc2.73x markup
J3111Injection, romosozumab-aqqg, 1 mg⚠ 3.2x markup
$1.3M
167.2K services$7.54/svc3.18x markup
J1602Injection, golimumab, 1 mg, for intravenous use⚠ 3.7x markup
$1.1M
72.5K services$14.98/svc3.66x markup
J1556Injection, immune globulin (bivigam), 500 mg
$1.1M
18.9K services$55.69/svc2.69x markup
J1569Injection, immune globulin, (gammagard liquid), non-lyophilized, (e.g., liquid), 500 mg
$1.0M
29.6K services$34.13/svc2.43x markup
99215Established patient office or other outpatient visit, 40-54 minutes
$858.5K
6.8K services$126.25/svc2.29x markup
99214Established patient office or other outpatient visit, 30-39 minutes
$819.0K
8.9K services$92.41/svc2.92x markup
J3380Injection, vedolizumab, 1 mg⚠ 3.7x markup
$802.4K
46.2K services$17.37/svc3.74x markup
J3358Ustekinumab, for intravenous injection, 1 mg⚠ 4.7x markup
$529.3K
55.4K services$9.56/svc4.71x markup
J2182Injection, mepolizumab, 1 mg
$471.7K
20.6K services$22.90/svc1.54x markup
96413Administration of chemotherapy into vein, 1 hour or less⚠ 3.7x markup
$358.6K
2.9K services$122.46/svc3.72x markup
82306Vitamin d-3 level
$324.2K
9.3K services$34.98/svc2.55x markup
J1439Injection, ferric carboxymaltose, 1 mg⚠ 5.4x markup
$311.2K
358.5K services$0.87/svc5.38x markup
Show detailed table ▾
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
J3357Ustekinumab, for subcutaneous injection, 1 mg77.7K$11.1M$142.742.85x
J1745Injection, infliximab, excludes biosimilar, 10 mg92.6K$4.5M$48.313.15x
J0717Injection, certolizumab pegol, 1 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered)832.5K$4.4M$5.332.08x
J2357Injection, omalizumab, 5 mg138.8K$3.7M$26.561.44x
J9312Injection, rituximab, 10 mg23.4K$1.7M$70.873.06x
J0129Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered)41.7K$1.6M$38.412.07x
J9310Injection, rituximab, 100 mg2.4K$1.4M$611.842.33x
J0897Injection, denosumab, 1 mg91.1K$1.3M$14.452.73x
J3111Injection, romosozumab-aqqg, 1 mg167.2K$1.3M$7.543.18x
J1602Injection, golimumab, 1 mg, for intravenous use72.5K$1.1M$14.983.66x
J1556Injection, immune globulin (bivigam), 500 mg18.9K$1.1M$55.692.69x
J1569Injection, immune globulin, (gammagard liquid), non-lyophilized, (e.g., liquid), 500 mg29.6K$1.0M$34.132.43x
99215Established patient office or other outpatient visit, 40-54 minutes6.8K$858.5K$126.252.29x
99214Established patient office or other outpatient visit, 30-39 minutes8.9K$819.0K$92.412.92x
J3380Injection, vedolizumab, 1 mg46.2K$802.4K$17.373.74x
J3358Ustekinumab, for intravenous injection, 1 mg55.4K$529.3K$9.564.71x
J2182Injection, mepolizumab, 1 mg20.6K$471.7K$22.901.54x
96413Administration of chemotherapy into vein, 1 hour or less2.9K$358.6K$122.463.72x
82306Vitamin d-3 level9.3K$324.2K$34.982.55x
J1439Injection, ferric carboxymaltose, 1 mg358.5K$311.2K$0.875.38x

Markup Analysis

Charge-to-Payment Ratio

2.81x

This provider submits charges 2.81 times higher than what Medicare actually pays.

What This Means

A markup ratio of 2.81x means for every $100 Medicare pays, this provider initially charges $281. 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.

Similar Providers

Other Rheumatology providers in CA for peer comparison.

Arash Horizon (you)
$45.0M
Barry Eibschutz, M.D.
$55.8M
Shariar Cohen-Gadol, M.D.⚠️
$49.5M
Gerald Ho, M.D.
$45.8M
Daniel Watrous, M.D.
$41.6M
Eric Lee, M.D.
$37.5M
Show detailed table ▾
ProviderLocationTotal PaymentsStatus
Barry Eibschutz, M.D.San Luis Obispo, CA$55.8M✓ Clear
Shariar Cohen-Gadol, M.D.Thousand Oaks, CA$49.5M⚠️ Flagged
Gerald Ho, M.D.La Palma, CA$45.8M✓ Clear
Daniel Watrous, M.D.Visalia, CA$41.6M✓ Clear
Eric Lee, M.D.Upland, CA$37.5M✓ 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