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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.
Sister Sites: OpenMedicaid ยท OpenFeds ยท OpenSpending

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

Methodologyโ€ขDownload Data
  1. Home
  2. Providers
  3. Douglas Marx
๐Ÿฉบ
DOIndividual

Douglas Marx, D.O.

NPI: 1326011321
Germantown, WI
10 years of data
Family Practice
$4.5M
Total Payments
138.8K
Beneficiaries
141.2K
Services
1.65x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$4.5M
Specialty median$55.2K

๐Ÿ“‹ Key Findings

1Billed $4.5M over 10 years
21.65x markup ratio
399th percentile in Family Practice by payments
456 services/day โ€” unusually high
5Payments surged 2834% in 2021
64 procedures with >3x markup

This provider averages 56 services per working day

Based on 141.2K total services over 10 years (250 working days/year). Learn about impossible service volumes โ†’

๐Ÿ”Ž Data Analysis

This provider's $4.5M in total Medicare payments ranks in the 99th percentile of Family Practice providers nationally.

Averaging 56 services per working day raises questions about billing patterns.

Medicare payments to this provider grew 934% 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

๐Ÿ“ˆ

Notable: Payments increased 2834% 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
2014$107.66$32.983.26x$74.68$76.4K2.2K1.8K
2015$126.38$43.272.92x$83.11$88.9K2.1K1.7K
2016$153.15$56.022.73x$97.13$103.4K2.3K2.0K
2017$123.98$46.812.65x$77.17$75.8K1.8K1.5K
2018$151.40$63.182.40x$88.22$107.4K2.4K2.2K
2019$144.84$60.842.38x$84.00$100.4K2.4K2.2K
2020$144.68$49.212.94x$95.47$83.5K2.0K1.9K
2021$101.57$43.682.33x$57.89$2.4M86.1K85.9K
2022$118.29$45.412.60x$72.88$639.9K22.6K22.5K
2023$189.22$67.772.79x$121.45$789.6K17.3K17.1K

Top Procedures (20)

90662Vaccine for influenza for injection into muscle
$892.6K
16.6K services$53.75/svc1.02x markup
0012AAdm sarscov2 100mcg/0.5ml2nd
$583.6K
18.1K services$32.30/svc1.49x markup
0002AAdm sarscov2 30mcg/0.3ml 2nd
$551.7K
16.8K services$32.83/svc1.52x markup
0001AAdm sarscov2 30mcg/0.3ml 1st
$344.3K
16.8K services$20.50/svc1.50x markup
0011AAdm sarscov2 100mcg/0.5ml1st
$327.3K
17.9K services$18.26/svc1.47x markup
0003AFee covid-19 vac 1 booster
$281.1K
7.4K services$38.14/svc1.57x markup
91322Sarscov2 vac 50 mcg/0.5ml im
$257.5K
1.8K services$142.03/svc1.02x markup
G0008Administration of influenza virus vaccine
$250.1K
18.3K services$13.69/svc1.02x markup
99214Established patient office or other outpatient, visit typically 25 minutesโš  5.3x markup
$214.4K
3.2K services$66.66/svc5.31x markup
0013AFee covid-19 vac 2 booster
$187.9K
4.9K services$38.15/svc1.57x markup
G0439Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visitโš  3.1x markup
$150.2K
1.3K services$114.98/svc3.08x markup
0124AFee covid-19 vac 13 res
$115.5K
3.1K services$37.39/svc1.60x markup
90480Admn sarscov2 vacc 1 dose
$69.8K
1.8K services$38.55/svc1.63x markup
99213Established patient office or other outpatient visit, typically 15 minutesโš  5.2x markup
$49.1K
1.1K services$45.20/svc5.18x markup
0031AAdm sarscov2 vac ad26 .5ml
$49.0K
1.3K services$38.16/svc1.57x markup
90670Pneumococcal vaccine for injection into muscle
$43.5K
250 services$174.19/svc1.06x markup
0054AAdm sarscv2 30mcg trs-sucr b
$43.0K
1.2K services$37.36/svc1.61x markup
90686Vaccine for influenza administered into muscle to individuals 3 years of age and older
$31.7K
1.6K services$19.22/svc1.02x markup
0064AAdm sarscov2 50mcg/0.25mlbst
$24.5K
656 services$37.30/svc1.61x markup
90677Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular useโš  3.1x markup
$15.2K
54 services$280.61/svc3.13x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
90662Vaccine for influenza for injection into muscle16.6K$892.6K$53.751.02x
0012AAdm sarscov2 100mcg/0.5ml2nd18.1K$583.6K$32.301.49x
0002AAdm sarscov2 30mcg/0.3ml 2nd16.8K$551.7K$32.831.52x
0001AAdm sarscov2 30mcg/0.3ml 1st16.8K$344.3K$20.501.50x
0011AAdm sarscov2 100mcg/0.5ml1st17.9K$327.3K$18.261.47x
0003AFee covid-19 vac 1 booster7.4K$281.1K$38.141.57x
91322Sarscov2 vac 50 mcg/0.5ml im1.8K$257.5K$142.031.02x
G0008Administration of influenza virus vaccine18.3K$250.1K$13.691.02x
99214Established patient office or other outpatient, visit typically 25 minutes3.2K$214.4K$66.665.31x
0013AFee covid-19 vac 2 booster4.9K$187.9K$38.151.57x
G0439Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit1.3K$150.2K$114.983.08x
0124AFee covid-19 vac 13 res3.1K$115.5K$37.391.60x
90480Admn sarscov2 vacc 1 dose1.8K$69.8K$38.551.63x
99213Established patient office or other outpatient visit, typically 15 minutes1.1K$49.1K$45.205.18x
0031AAdm sarscov2 vac ad26 .5ml1.3K$49.0K$38.161.57x
90670Pneumococcal vaccine for injection into muscle250$43.5K$174.191.06x
0054AAdm sarscv2 30mcg trs-sucr b1.2K$43.0K$37.361.61x
90686Vaccine for influenza administered into muscle to individuals 3 years of age and older1.6K$31.7K$19.221.02x
0064AAdm sarscov2 50mcg/0.25mlbst656$24.5K$37.301.61x
90677Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use54$15.2K$280.613.13x

Markup Analysis

Charge-to-Payment Ratio

1.65x

This provider submits charges 1.65 times higher than what Medicare actually pays.

What This Means

A markup ratio of 1.65x means for every $100 Medicare pays, this provider initially charges $165. This is lower than the national average.

Location

Germantown, WI

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

  • 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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