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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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ยฉ 2026 OpenMedicare. Independent data journalism. Built by TheDataProject.ai

Methodologyโ€ขDownload Data
  1. Home
  2. Providers
  3. Derek Kunimoto
๐Ÿ‘๏ธ
MDIndividual

Derek Kunimoto, MD

NPI: 1558329847
Mesa, AZ
10 years of data
Ophthalmology
$68.3M
Total Payments
77.8K
Beneficiaries
436.3K
Services
2x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$68.3M
Specialty median$383.7K
Rank #11 of 189 in specialty

๐Ÿ“‹ Key Findings

1Billed $68.3M over 10 years
22x markup ratio
399th percentile in Ophthalmology by payments
4175 services/day โ€” unusually high
5Payments surged 68% in 2016
62 procedures with >3x markup

This provider averages 175 services per working day

Based on 436.3K total services over 10 years (250 working days/year). Learn about impossible service volumes โ†’

๐Ÿ”Ž Data Analysis

This provider's $68.3M in total Medicare payments ranks in the 99th percentile of Ophthalmology providers nationally.

Averaging 175 services per working day raises questions about billing patterns.

AI-generated analysis based on Medicare payment data.

Annual Medicare Payments

Annual Services Provided

Avg Payment per Service

Markup Ratio Over Time

๐Ÿ“ˆ

Notable: Payments increased 68% in 2016

Year-over-year payment surges can indicate changes in practice volume, new services, or billing pattern shifts.

Submitted Charges vs. Medicare Payments

Average per-service amounts submitted by the provider compared to what Medicare actually paid โ€” the gap represents the markup.

YearAvg SubmittedAvg PaidMarkup RatioGap per ServiceTotal PaymentsServicesBeneficiaries
2014$313.28$156.512.00x$156.77$5.5M34.9K6.2K
2015$492.37$156.513.15x$335.86$4.2M26.6K4.7K
2016$270.67$156.511.73x$114.16$7.0M44.6K8.0K
2017$390.92$156.522.50x$234.40$6.6M42.1K7.5K
2018$402.40$156.522.57x$245.88$8.0M51.0K9.1K
2019$436.25$156.512.79x$279.74$5.5M34.9K6.2K
2020$557.28$156.513.56x$400.77$6.8M43.7K7.8K
2021$337.05$156.522.15x$180.53$8.8M56.3K10.0K
2022$533.88$156.523.41x$377.36$8.2M52.7K9.4K
2023$530.61$156.513.39x$374.10$7.7M49.5K8.8K

Top Procedures (10)

92014Eye exam, established patient, comprehensive
$12.3M
44.7K services$275.43/svc1.94x markup
92012Eye exam, established patient, intermediate
$7.6M
43.2K services$175.16/svc2.37x markup
66984Cataract removal with lens insertion
$6.8M
54.2K services$125.50/svc1.78x markup
92004Eye exam, new patient, comprehensive
$6.5M
57.8K services$113.23/svc2.09x markup
92083Visual field examination
$5.1M
26.2K services$193.26/svc2.43x markup
67028Injection into eye
$4.3M
34.2K services$125.93/svc1.27x markup
65855Laser surgery for glaucoma
$4.0M
35.7K services$112.53/svc2.01x markup
92134Scanning computerized ophthalmic imagingโš  3.2x markup
$3.2M
30.0K services$105.54/svc3.23x markup
92136Ophthalmic biometry
$2.9M
24.6K services$116.76/svc2.73x markup
92250Eye imaging, optic nerveโš  3.1x markup
$2.0M
15.7K services$126.98/svc3.06x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
92014Eye exam, established patient, comprehensive44.7K$12.3M$275.431.94x
92012Eye exam, established patient, intermediate43.2K$7.6M$175.162.37x
66984Cataract removal with lens insertion54.2K$6.8M$125.501.78x
92004Eye exam, new patient, comprehensive57.8K$6.5M$113.232.09x
92083Visual field examination26.2K$5.1M$193.262.43x
67028Injection into eye34.2K$4.3M$125.931.27x
65855Laser surgery for glaucoma35.7K$4.0M$112.532.01x
92134Scanning computerized ophthalmic imaging30.0K$3.2M$105.543.23x
92136Ophthalmic biometry24.6K$2.9M$116.762.73x
92250Eye imaging, optic nerve15.7K$2.0M$126.983.06x

Markup Analysis

Charge-to-Payment Ratio

2x

This provider submits charges 2 times higher than what Medicare actually pays.

What This Means

A markup ratio of 2x means for every $100 Medicare pays, this provider initially charges $200. This is lower than the national average.

Location

Mesa, AZ

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 Ophthalmology providers in AZ for peer comparison.

Derek Kunimoto (you)
$68.3M
David Goldenberg, MD
$50.8M
Sachin Mehta, M.D.
$43.3M
Edward Quinlan, M.D.
$40.1M
Show detailed table โ–พ
ProviderLocationTotal PaymentsStatus
David Goldenberg, MDPhoenix, AZ$50.8Mโœ“ Clear
Sachin Mehta, M.D.Phoenix, AZ$43.3Mโœ“ Clear
Edward Quinlan, M.D.Phoenix, AZ$40.1Mโœ“ Clear

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Data Sources

  • โ€ข Centers for Medicare & Medicaid Services (CMS)
  • โ€ข Medicare Provider Utilization and Payment Data (2014-2023)
  • โ€ข 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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