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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. Steven Baak
⚕️
MDIndividual

Steven Baak, M.D.

NPI: 1598738262
Bridgeton, MO
10 years of data
Rheumatology
$31.1M
Total Payments
230
Beneficiaries
2.2M
Services
4.07x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$31.1M
Specialty median$352.6K

📋 Key Findings

1Billed $31.1M over 10 years
24.07x markup ratio (above median)
399th percentile in Rheumatology by payments
4877 services/day — physically implausible
5Payments surged 631% in 2016
619 procedures with >3x markup

⚠️ This provider averages 877 services per working day — physically unusual for an individual practitioner

Based on 2.2M total services over 10 years (250 working days/year). Learn about impossible service volumes →

🔎 Data Analysis

This provider's $31.1M in total Medicare payments ranks in the 99th percentile of Rheumatology providers nationally.

Averaging 877 services per working day raises questions about billing patterns.

Medicare payments to this provider grew 3469% 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

📈

Notable: Payments increased 631% 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 — the gap represents the markup.

YearAvg SubmittedAvg PaidMarkup RatioGap per ServiceTotal PaymentsServicesBeneficiaries
2014$73.48$39.621.85x$33.86$90.9K2.3K22
2015$89.06$45.411.96x$43.65$229.9K5.1K19
2016$116.02$32.063.62x$83.96$1.7M52.5K24
2017$68.44$17.773.85x$50.67$3.4M193.8K29
2018$61.35$15.963.84x$45.39$4.3M271.0K26
2019$52.81$13.423.94x$39.39$4.2M310.5K23
2020$55.33$14.443.83x$40.89$4.6M316.3K22
2021$57.74$14.204.07x$43.54$5.3M370.8K21
2022$52.59$12.194.31x$40.40$4.1M338.0K22
2023$50.85$9.755.22x$41.10$3.2M333.0K22

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)⚠ 3.7x markup
$10.4M
269.2K services$38.80/svc3.70x 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)⚠ 4.1x markup
$6.7M
1.2M services$5.79/svc4.10x markup
J1602Injection, golimumab, 1 mg, for intravenous use⚠ 5.1x markup
$6.1M
479.7K services$12.69/svc5.06x markup
J1745Injection, infliximab, excludes biosimilar, 10 mg⚠ 4.3x markup
$2.3M
44.6K services$52.63/svc4.28x markup
J9312Injection, rituximab, 10 mg⚠ 3.8x markup
$1.1M
15.1K services$71.04/svc3.76x markup
J9310Injection, rituximab, 100 mg⚠ 3.8x markup
$1.0M
1.5K services$669.20/svc3.78x markup
99214Established patient office or other outpatient visit, 30-39 minutes⚠ 3.4x markup
$915.4K
12.0K services$76.48/svc3.38x markup
J3262Injection, tocilizumab, 1 mg⚠ 3.1x markup
$743.0K
175.9K services$4.22/svc3.10x markup
96365Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less⚠ 4.3x markup
$326.9K
6.1K services$53.42/svc4.27x markup
20611Aspiration and/or injection of fluid large joint using ultrasound guidance⚠ 3.8x markup
$305.0K
4.7K services$65.41/svc3.78x markup
J7323Hyaluronan or derivative, euflexxa, for intra-articular injection, per dose
$241.2K
2.2K services$110.91/svc1.89x markup
96413Administration of chemotherapy into vein, 1 hour or less⚠ 4.0x markup
$200.0K
2.0K services$101.96/svc4.01x markup
76881Complete ultrasound scan of joint⚠ 4.2x markup
$153.9K
2.3K services$68.02/svc4.20x markup
99204New patient office or other outpatient visit, 45-59 minutes⚠ 3.5x markup
$113.9K
983 services$115.91/svc3.50x markup
99215Established patient office or other outpatient visit, 40-54 minutes⚠ 3.3x markup
$95.0K
854 services$111.21/svc3.34x markup
96372Injection of drug or substance under skin or into muscle⚠ 4.4x markup
$73.7K
5.6K services$13.22/svc4.42x markup
96415Administration of chemotherapy into vein, each additional hour⚠ 4.4x markup
$45.7K
2.0K services$22.61/svc4.44x markup
99205New patient office or other outpatient visit, 60-74 minutes⚠ 3.6x markup
$28.2K
188 services$149.81/svc3.64x markup
J0897Injection, denosumab, 1 mg⚠ 3.8x markup
$28.1K
2.2K services$13.01/svc3.84x markup
99213Established patient office or other outpatient visit, typically 15 minutes⚠ 3.1x markup
$25.8K
604 services$42.64/svc3.13x 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)269.2K$10.4M$38.803.70x
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)1.2M$6.7M$5.794.10x
J1602Injection, golimumab, 1 mg, for intravenous use479.7K$6.1M$12.695.06x
J1745Injection, infliximab, excludes biosimilar, 10 mg44.6K$2.3M$52.634.28x
J9312Injection, rituximab, 10 mg15.1K$1.1M$71.043.76x
J9310Injection, rituximab, 100 mg1.5K$1.0M$669.203.78x
99214Established patient office or other outpatient visit, 30-39 minutes12.0K$915.4K$76.483.38x
J3262Injection, tocilizumab, 1 mg175.9K$743.0K$4.223.10x
96365Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less6.1K$326.9K$53.424.27x
20611Aspiration and/or injection of fluid large joint using ultrasound guidance4.7K$305.0K$65.413.78x
J7323Hyaluronan or derivative, euflexxa, for intra-articular injection, per dose2.2K$241.2K$110.911.89x
96413Administration of chemotherapy into vein, 1 hour or less2.0K$200.0K$101.964.01x
76881Complete ultrasound scan of joint2.3K$153.9K$68.024.20x
99204New patient office or other outpatient visit, 45-59 minutes983$113.9K$115.913.50x
99215Established patient office or other outpatient visit, 40-54 minutes854$95.0K$111.213.34x
96372Injection of drug or substance under skin or into muscle5.6K$73.7K$13.224.42x
96415Administration of chemotherapy into vein, each additional hour2.0K$45.7K$22.614.44x
99205New patient office or other outpatient visit, 60-74 minutes188$28.2K$149.813.64x
J0897Injection, denosumab, 1 mg2.2K$28.1K$13.013.84x
99213Established patient office or other outpatient visit, typically 15 minutes604$25.8K$42.643.13x

Markup Analysis

Charge-to-Payment Ratio

4.07x

This provider submits charges 4.07 times higher than what Medicare actually pays.

What This Means

A markup ratio of 4.07x means for every $100 Medicare pays, this provider initially charges $407. This is higher than the national average.

Location

Bridgeton, MO

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 MO for peer comparison.

Steven Baak (you)
$31.1M
Michael Joseph, MD
$40.7M
Show detailed table ▾
ProviderLocationTotal PaymentsStatus
Michael Joseph, MDJoplin, MO$40.7M✓ 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.

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