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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. David Massop
๐Ÿ‘๏ธ
MDIndividual

David Massop, MD

NPI: 1003267956
Des Moines, IA
4 years of data
Ophthalmology
$5.0M
Total Payments
47
Beneficiaries
107.5K
Services
2.78x
Markup Ratio

Peer Comparison

96th
percentile in specialty
This provider$5.0M
Specialty median$383.7K

๐Ÿ“‹ Key Findings

1Billed $5.0M over 4 years
22.78x markup ratio (above median)
396th percentile in Ophthalmology by payments
4108 services/day โ€” unusually high
5Payments surged 4533% in 2021
611 procedures with >3x markup

This provider averages 108 services per working day

Based on 107.5K total services over 4 years (250 working days/year). Learn about impossible service volumes โ†’

๐Ÿ”Ž Data Analysis

This provider's $5.0M in total Medicare payments ranks in the 96th percentile of Ophthalmology providers nationally.

Averaging 108 services per working day raises questions about billing patterns.

Medicare payments to this provider grew 144800% from 2020 to 2023.

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 4533% in 2021

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
2020$4.2K$140.5929.87x$4.1K$2.7K191
2021$894.34$231.773.86x$662.57$123.8K5349
2022$230.91$89.742.57x$141.17$1.0M11.7K16
2023$113.22$40.602.79x$72.62$3.9M95.3K21

Top Procedures (20)

J2777Injection, faricimab-svoa, 0.1 mg
$2.7M
94.0K services$28.93/svc2.59x markup
J0178Injection, aflibercept, 1 mg
$1.2M
1.7K services$695.40/svc1.80x markup
J2778Injection, ranibizumab, 0.1 mg
$490.5K
2.5K services$195.88/svc2.65x markup
67028Injection of drug into eyeโš  7.6x markup
$244.3K
2.8K services$85.91/svc7.59x markup
92134Imaging of retinaโš  3.9x markup
$102.6K
3.6K services$28.44/svc3.90x markup
J3590Unclassified biologics
$64.2K
392 services$163.71/svc2.96x markup
92014Established patient complete exam of visual systemโš  3.5x markup
$40.4K
465 services$86.78/svc3.49x markup
67042Removal of membrane of retina with removal of internal limiting membrane of retinaโš  9.7x markup
$39.1K
153 services$255.59/svc9.67x markup
99213Established patient office or other outpatient visit, 20-29 minutes
$36.6K
591 services$62.00/svc2.26x markup
99214Established patient office or other outpatient visit, 30-39 minutes
$28.8K
331 services$87.14/svc2.31x markup
J7312Injection, dexamethasone, intravitreal implant, 0.1 mg
$24.5K
154 services$159.16/svc1.57x markup
67108Repair of detached retina with drainage and removal of eye fluid between lens and retinaโš  6.6x markup
$17.7K
50 services$354.73/svc6.57x markup
67113Complex repair of detached retina and drainage of eye fluid between lens and retinaโš  4.7x markup
$13.6K
15 services$909.26/svc4.69x markup
92004New patient complete exam of visual systemโš  3.7x markup
$10.6K
108 services$98.12/svc3.68x markup
67036Removal of eye fluid (vitreous) between lens and retinaโš  8.2x markup
$9.3K
43 services$215.59/svc8.19x markup
99212Established patient office or other outpatient visit, 10-19 minutes
$7.4K
193 services$38.48/svc2.21x markup
66821Removal of recurring cataract in lens capsule using a laserโš  4.2x markup
$7.2K
31 services$232.75/svc4.17x markup
92250Photography of the retinaโš  7.0x markup
$6.7K
267 services$25.12/svc6.97x markup
92235Exam of retinal blood vessels using a special camera after injection of a dyeโš  3.4x markup
$3.6K
43 services$84.59/svc3.37x markup
99204New patient office or other outpatient visit, 45-59 minutes
$2.9K
26 services$112.91/svc2.69x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
J2777Injection, faricimab-svoa, 0.1 mg94.0K$2.7M$28.932.59x
J0178Injection, aflibercept, 1 mg1.7K$1.2M$695.401.80x
J2778Injection, ranibizumab, 0.1 mg2.5K$490.5K$195.882.65x
67028Injection of drug into eye2.8K$244.3K$85.917.59x
92134Imaging of retina3.6K$102.6K$28.443.90x
J3590Unclassified biologics392$64.2K$163.712.96x
92014Established patient complete exam of visual system465$40.4K$86.783.49x
67042Removal of membrane of retina with removal of internal limiting membrane of retina153$39.1K$255.599.67x
99213Established patient office or other outpatient visit, 20-29 minutes591$36.6K$62.002.26x
99214Established patient office or other outpatient visit, 30-39 minutes331$28.8K$87.142.31x
J7312Injection, dexamethasone, intravitreal implant, 0.1 mg154$24.5K$159.161.57x
67108Repair of detached retina with drainage and removal of eye fluid between lens and retina50$17.7K$354.736.57x
67113Complex repair of detached retina and drainage of eye fluid between lens and retina15$13.6K$909.264.69x
92004New patient complete exam of visual system108$10.6K$98.123.68x
67036Removal of eye fluid (vitreous) between lens and retina43$9.3K$215.598.19x
99212Established patient office or other outpatient visit, 10-19 minutes193$7.4K$38.482.21x
66821Removal of recurring cataract in lens capsule using a laser31$7.2K$232.754.17x
92250Photography of the retina267$6.7K$25.126.97x
92235Exam of retinal blood vessels using a special camera after injection of a dye43$3.6K$84.593.37x
99204New patient office or other outpatient visit, 45-59 minutes26$2.9K$112.912.69x

Markup Analysis

Charge-to-Payment Ratio

2.78x

This provider submits charges 2.78 times higher than what Medicare actually pays.

What This Means

A markup ratio of 2.78x means for every $100 Medicare pays, this provider initially charges $278. This is higher than the national average.

Location

Des Moines, IA

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 IA for peer comparison.

David Massop (you)
$5.0M
Kyle Alliman, M.D.
$83.3M
David Saggau, MD
$73.8M
Jared Nielsen, M.D., M.S.
$68.1M
Alex Kartvelishvili, M.D.
$45.0M
Michael Wadzinski, M.D.
$37.7M
Show detailed table โ–พ
ProviderLocationTotal PaymentsStatus
Kyle Alliman, M.D.West Des Moines, IA$83.3Mโœ“ Clear
David Saggau, MDWest Des Moines, IA$73.8Mโœ“ Clear
Jared Nielsen, M.D., M.S.West Des Moines, IA$68.1Mโœ“ Clear
Alex Kartvelishvili, M.D.Iowa City, IA$45.0Mโœ“ Clear
Michael Wadzinski, M.D.Sioux City, IA$37.7Mโœ“ 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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