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Methodology•Download Data
  1. Home
  2. Providers
  3. Stephen Chen
⚕️
MDIndividual

Stephen Chen, MD

NPI: 1205821477
Monterey Park, CA
10 years of data
Critical Care (Intensivists)
$6.8M
Total Payments
24.2K
Beneficiaries
68.3K
Services
2.37x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$6.8M
Specialty median$69.5K

📋 Key Findings

1Billed $6.8M over 10 years
22.37x markup ratio (above median)
399th percentile in Critical Care (Intensivists) by payments
44 procedures with >3x markup
✓ No flags detected

🔎 Data Analysis

This provider's $6.8M in total Medicare payments ranks in the 99th percentile of Critical Care (Intensivists) providers nationally.

This provider's billing patterns fall within normal ranges for their specialty.

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$195.53$70.822.76x$124.71$791.9K8.9K2.7K
2015$175.22$72.482.42x$102.74$697.1K7.8K2.8K
2016$179.60$69.202.60x$110.40$611.5K6.8K2.7K
2017$185.24$67.412.75x$117.83$635.8K7.4K2.6K
2018$172.56$73.192.36x$99.37$716.7K7.6K2.7K
2019$186.72$85.852.17x$100.87$681.2K6.8K2.4K
2020$279.08$87.023.21x$192.06$793.0K7.1K2.1K
2021$325.30$99.103.28x$226.20$615.1K5.1K2.0K
2022$301.79$90.403.34x$211.39$616.5K5.4K2.1K
2023$303.35$97.343.12x$206.01$651.9K5.5K2.2K

Top Procedures (20)

99233Subsequent hospital inpatient care, typically 35 minutes per day
$2.3M
26.1K services$87.84/svc2.21x markup
99291Critical care delivery critically ill or injured patient, first 30-74 minutes
$1.8M
10.0K services$183.67/svc2.54x markup
99232Subsequent hospital inpatient care, typically 25 minutes per day
$733.0K
12.3K services$59.82/svc2.29x markup
99214Established patient office or other outpatient, visit typically 25 minutes
$524.7K
6.0K services$87.07/svc2.52x markup
99215Established patient office or other outpatient, visit typically 40 minutes
$502.3K
3.9K services$127.19/svc2.24x markup
99223Initial hospital inpatient care, typically 70 minutes per day
$408.7K
2.5K services$165.12/svc2.08x markup
99310Subsequent nursing facility visit, typically 35 minutes per day
$75.8K
651 services$116.39/svc1.81x markup
99309Subsequent nursing facility visit, typically 25 minutes per day
$51.9K
661 services$78.57/svc1.91x markup
99205New patient office or other outpatient visit, typically 60 minutes
$45.5K
274 services$166.02/svc2.34x markup
31645Aspiration of lung secretions from lung airways using an endoscope⚠ 4.5x markup
$40.2K
316 services$127.06/svc4.45x markup
99204New patient office or other outpatient visit, typically 45 minutes
$34.3K
285 services$120.32/svc2.57x markup
94729Measurement of lung diffusing capacity
$30.1K
675 services$44.56/svc2.86x markup
94060Measurement and graphic recording of the amount and speed of breathed air, before and following medication administration⚠ 4.5x markup
$27.9K
665 services$41.96/svc4.49x markup
G0180Physician certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians to affirm the initial imple
$24.5K
543 services$45.08/svc2.88x markup
99239Hospital discharge day management, more than 30 minutes
$23.6K
263 services$89.82/svc2.10x markup
99292Critical care delivery critically ill or injured patient
$23.4K
253 services$92.39/svc2.40x markup
94727Determination of lung volumes using gas dilution or washout⚠ 3.4x markup
$23.1K
675 services$34.23/svc3.43x markup
90670Pneumococcal vaccine for injection into muscle
$18.2K
94 services$193.75/svc1.24x markup
31500Emergent insertion of breathing tube into windpipe cartilage using an endoscope
$15.0K
137 services$109.65/svc2.85x markup
95800Study of sleep patterns⚠ 3.2x markup
$11.6K
187 services$62.11/svc3.22x markup
Show detailed table ▾
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
99233Subsequent hospital inpatient care, typically 35 minutes per day26.1K$2.3M$87.842.21x
99291Critical care delivery critically ill or injured patient, first 30-74 minutes10.0K$1.8M$183.672.54x
99232Subsequent hospital inpatient care, typically 25 minutes per day12.3K$733.0K$59.822.29x
99214Established patient office or other outpatient, visit typically 25 minutes6.0K$524.7K$87.072.52x
99215Established patient office or other outpatient, visit typically 40 minutes3.9K$502.3K$127.192.24x
99223Initial hospital inpatient care, typically 70 minutes per day2.5K$408.7K$165.122.08x
99310Subsequent nursing facility visit, typically 35 minutes per day651$75.8K$116.391.81x
99309Subsequent nursing facility visit, typically 25 minutes per day661$51.9K$78.571.91x
99205New patient office or other outpatient visit, typically 60 minutes274$45.5K$166.022.34x
31645Aspiration of lung secretions from lung airways using an endoscope316$40.2K$127.064.45x
99204New patient office or other outpatient visit, typically 45 minutes285$34.3K$120.322.57x
94729Measurement of lung diffusing capacity675$30.1K$44.562.86x
94060Measurement and graphic recording of the amount and speed of breathed air, before and following medication administration665$27.9K$41.964.49x
G0180Physician certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians to affirm the initial imple543$24.5K$45.082.88x
99239Hospital discharge day management, more than 30 minutes263$23.6K$89.822.10x
99292Critical care delivery critically ill or injured patient253$23.4K$92.392.40x
94727Determination of lung volumes using gas dilution or washout675$23.1K$34.233.43x
90670Pneumococcal vaccine for injection into muscle94$18.2K$193.751.24x
31500Emergent insertion of breathing tube into windpipe cartilage using an endoscope137$15.0K$109.652.85x
95800Study of sleep patterns187$11.6K$62.113.22x

Markup Analysis

Charge-to-Payment Ratio

2.37x

This provider submits charges 2.37 times higher than what Medicare actually pays.

What This Means

A markup ratio of 2.37x means for every $100 Medicare pays, this provider initially charges $237. This is higher than the national average.

Location

Monterey Park, CA

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.

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