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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. Ken Arakawa
⚕️
MDIndividual

Ken Arakawa, M.D.

NPI: 1558334888
Honolulu, HI
10 years of data
Rheumatology
$24.2M
Total Payments
449
Beneficiaries
1.5M
Services
2.73x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$24.2M
Specialty median$352.6K

📋 Key Findings

1Billed $24.2M over 10 years
22.73x markup ratio (above median)
399th percentile in Rheumatology by payments
4618 services/day — physically implausible
510 procedures with >3x markup

⚠️ This provider averages 618 services per working day — physically unusual for an individual practitioner

Based on 1.5M total services over 10 years (250 working days/year). Learn about impossible service volumes →

🔎 Data Analysis

This provider's $24.2M in total Medicare payments ranks in the 99th percentile of Rheumatology providers nationally.

Averaging 618 services per working day raises questions about billing patterns.

Medicare payments to this provider grew 145% 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$31.75$10.403.05x$21.35$1.6M150.7K47
2015$32.42$11.112.92x$21.31$1.6M140.1K42
2016$37.42$13.112.85x$24.31$1.6M123.4K43
2017$76.56$26.182.92x$50.38$1.7M63.9K47
2018$45.69$16.142.83x$29.55$2.1M131.1K46
2019$56.20$20.432.75x$35.77$2.6M125.3K44
2020$65.62$26.582.47x$39.04$2.8M106.5K46
2021$44.02$18.162.42x$25.86$3.4M186.3K50
2022$39.03$14.992.60x$24.04$3.1M206.7K41
2023$35.50$12.372.87x$23.13$3.8M310.7K43

Top Procedures (20)

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)
$9.1M
250.3K services$36.41/svc2.04x markup
J1745Injection, infliximab, excludes biosimilar, 10 mg
$2.4M
49.4K services$48.39/svc2.20x markup
99214Established patient office or other outpatient visit, 30-39 minutes
$2.1M
25.9K services$82.40/svc2.09x markup
J0897Injection, denosumab, 1 mg
$2.0M
129.9K services$15.52/svc2.36x 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)⚠ 3.2x markup
$1.1M
270.4K services$4.17/svc3.19x markup
J3262Injection, tocilizumab, 1 mg
$956.5K
310.8K services$3.08/svc1.92x markup
J3111Injection, romosozumab-aqqg, 1 mg
$802.4K
110.9K services$7.24/svc1.99x markup
Q5103Injection, infliximab-dyyb, biosimilar, (inflectra), 10 mg⚠ 3.3x markup
$700.6K
19.2K services$36.52/svc3.30x markup
99213Established patient office or other outpatient visit, 20-29 minutes
$693.2K
13.2K services$52.38/svc2.41x markup
J3245Injection, tildrakizumab, 1 mg
$462.9K
4.6K services$100.62/svc2.18x markup
96365Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less⚠ 3.2x markup
$284.7K
4.7K services$60.12/svc3.20x markup
96413Administration of chemotherapy into vein, 1 hour or less
$261.0K
2.3K services$111.34/svc2.11x markup
73130X-ray of hand, minimum of 3 views⚠ 5.0x markup
$253.3K
9.2K services$27.61/svc5.03x markup
72110X-ray of lower and sacral spine, minimum of 4 views⚠ 5.5x markup
$201.9K
5.0K services$40.14/svc5.55x markup
20610Aspiration and/or injection of fluid from large joint⚠ 4.6x markup
$168.9K
3.6K services$47.03/svc4.56x markup
85025Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count⚠ 5.0x markup
$157.4K
17.9K services$8.79/svc5.01x markup
73560X-ray of knee, 1-2 views⚠ 4.0x markup
$156.4K
5.8K services$27.00/svc4.00x markup
73630X-ray of foot, minimum of 3 views⚠ 5.3x markup
$154.5K
5.9K services$26.04/svc5.34x markup
99205New patient office or other outpatient visit, 60-74 minutes
$152.9K
1.0K services$149.05/svc2.31x markup
73600X-ray of ankle, 2 views⚠ 4.3x markup
$149.8K
5.9K services$25.34/svc4.26x markup
Show detailed table ▾
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
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)250.3K$9.1M$36.412.04x
J1745Injection, infliximab, excludes biosimilar, 10 mg49.4K$2.4M$48.392.20x
99214Established patient office or other outpatient visit, 30-39 minutes25.9K$2.1M$82.402.09x
J0897Injection, denosumab, 1 mg129.9K$2.0M$15.522.36x
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)270.4K$1.1M$4.173.19x
J3262Injection, tocilizumab, 1 mg310.8K$956.5K$3.081.92x
J3111Injection, romosozumab-aqqg, 1 mg110.9K$802.4K$7.241.99x
Q5103Injection, infliximab-dyyb, biosimilar, (inflectra), 10 mg19.2K$700.6K$36.523.30x
99213Established patient office or other outpatient visit, 20-29 minutes13.2K$693.2K$52.382.41x
J3245Injection, tildrakizumab, 1 mg4.6K$462.9K$100.622.18x
96365Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less4.7K$284.7K$60.123.20x
96413Administration of chemotherapy into vein, 1 hour or less2.3K$261.0K$111.342.11x
73130X-ray of hand, minimum of 3 views9.2K$253.3K$27.615.03x
72110X-ray of lower and sacral spine, minimum of 4 views5.0K$201.9K$40.145.55x
20610Aspiration and/or injection of fluid from large joint3.6K$168.9K$47.034.56x
85025Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count17.9K$157.4K$8.795.01x
73560X-ray of knee, 1-2 views5.8K$156.4K$27.004.00x
73630X-ray of foot, minimum of 3 views5.9K$154.5K$26.045.34x
99205New patient office or other outpatient visit, 60-74 minutes1.0K$152.9K$149.052.31x
73600X-ray of ankle, 2 views5.9K$149.8K$25.344.26x

Markup Analysis

Charge-to-Payment Ratio

2.73x

This provider submits charges 2.73 times higher than what Medicare actually pays.

What This Means

A markup ratio of 2.73x means for every $100 Medicare pays, this provider initially charges $273. This is higher than the national average.

Location

Honolulu, HI

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.

Believe this data is inaccurate? Dispute this data