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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. Phong Nguyen
⚕️
MDIndividual

Phong Nguyen, MD

NPI: 1699836726
Reston, VA
10 years of data
Rheumatology
$22.2M
Total Payments
253
Beneficiaries
2.1M
Services
2.37x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$22.2M
Specialty median$352.6K

📋 Key Findings

1Billed $22.2M over 10 years
22.37x markup ratio (above median)
399th percentile in Rheumatology by payments
4822 services/day — physically implausible
5Payments surged 64% in 2015
63 procedures with >3x markup

⚠️ This provider averages 822 services per working day — physically unusual for an individual practitioner

Based on 2.1M total services over 10 years (250 working days/year). Learn about impossible service volumes →

🔎 Data Analysis

This provider's $22.2M in total Medicare payments ranks in the 99th percentile of Rheumatology providers nationally.

Averaging 822 services per working day raises questions about billing patterns.

Medicare payments to this provider grew 546% 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 64% in 2015

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$26.06$13.211.97x$12.85$652.1K49.4K29
2015$28.21$15.141.86x$13.07$1.1M70.4K25
2016$26.07$14.271.83x$11.80$1.2M85.5K26
2017$25.28$13.201.92x$12.08$1.4M104.5K24
2018$23.99$12.161.97x$11.83$1.5M126.0K22
2019$25.18$10.572.38x$14.61$1.9M178.7K23
2020$25.04$11.192.24x$13.85$2.3M201.8K25
2021$25.95$11.132.33x$14.82$3.6M319.3K26
2022$26.23$9.772.68x$16.46$4.4M451.1K26
2023$25.11$8.992.79x$16.12$4.2M468.8K27

Top Procedures (20)

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)
$6.3M
1.2M services$5.15/svc2.36x markup
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)
$4.0M
108.4K services$36.56/svc2.03x markup
J0897Injection, denosumab, 1 mg
$2.7M
168.5K services$15.87/svc2.15x markup
99214Established patient office or other outpatient visit, 30-39 minutes
$1.6M
17.6K services$91.75/svc2.47x markup
J1745Injection, infliximab, excludes biosimilar, 10 mg⚠ 3.1x markup
$1.4M
36.5K services$39.45/svc3.09x markup
J3262Injection, tocilizumab, 1 mg
$1.0M
238.8K services$4.35/svc2.20x markup
J3111Injection, romosozumab-aqqg, 1 mg
$990.6K
135.1K services$7.33/svc1.92x markup
96401Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle
$585.8K
8.4K services$69.88/svc2.33x markup
J1602Injection, golimumab, 1 mg, for intravenous use⚠ 3.1x markup
$558.3K
43.0K services$13.00/svc3.11x markup
20610Aspiration and/or injection of fluid from large joint⚠ 3.1x markup
$504.5K
8.9K services$56.58/svc3.10x markup
96413Administration of chemotherapy into vein, 1 hour or less
$412.0K
3.3K services$126.58/svc2.86x markup
J7321Hyaluronan or derivative, hyalgan, supartz or visco-3, for intra-articular injection, per dose
$281.1K
4.3K services$65.25/svc2.33x markup
J7324Hyaluronan or derivative, orthovisc, for intra-articular injection, per dose
$264.1K
2.1K services$126.38/svc2.68x markup
99213Established patient office or other outpatient visit, 20-29 minutes
$252.1K
3.9K services$64.31/svc2.55x markup
J7320Hyaluronan or derivitive, genvisc 850, for intra-articular injection, 1 mg
$221.4K
17.2K services$12.87/svc1.71x markup
J7322Hyaluronan or derivative, hymovis, for intra-articular injection, 1 mg
$218.4K
11.3K services$19.40/svc2.92x markup
99204New patient office or other outpatient visit, 45-59 minutes
$202.0K
1.5K services$133.54/svc2.68x markup
J3304Injection, triamcinolone acetonide, preservative-free, extended-release, microsphere formulation, 1 mg
$160.3K
11.4K services$14.11/svc2.08x markup
J9310Injection, rituximab, 100 mg
$128.3K
222 services$578.00/svc1.31x markup
99215Established patient office or other outpatient visit, 40-54 minutes
$52.2K
386 services$135.26/svc2.51x markup
Show detailed table ▾
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
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$6.3M$5.152.36x
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)108.4K$4.0M$36.562.03x
J0897Injection, denosumab, 1 mg168.5K$2.7M$15.872.15x
99214Established patient office or other outpatient visit, 30-39 minutes17.6K$1.6M$91.752.47x
J1745Injection, infliximab, excludes biosimilar, 10 mg36.5K$1.4M$39.453.09x
J3262Injection, tocilizumab, 1 mg238.8K$1.0M$4.352.20x
J3111Injection, romosozumab-aqqg, 1 mg135.1K$990.6K$7.331.92x
96401Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle8.4K$585.8K$69.882.33x
J1602Injection, golimumab, 1 mg, for intravenous use43.0K$558.3K$13.003.11x
20610Aspiration and/or injection of fluid from large joint8.9K$504.5K$56.583.10x
96413Administration of chemotherapy into vein, 1 hour or less3.3K$412.0K$126.582.86x
J7321Hyaluronan or derivative, hyalgan, supartz or visco-3, for intra-articular injection, per dose4.3K$281.1K$65.252.33x
J7324Hyaluronan or derivative, orthovisc, for intra-articular injection, per dose2.1K$264.1K$126.382.68x
99213Established patient office or other outpatient visit, 20-29 minutes3.9K$252.1K$64.312.55x
J7320Hyaluronan or derivitive, genvisc 850, for intra-articular injection, 1 mg17.2K$221.4K$12.871.71x
J7322Hyaluronan or derivative, hymovis, for intra-articular injection, 1 mg11.3K$218.4K$19.402.92x
99204New patient office or other outpatient visit, 45-59 minutes1.5K$202.0K$133.542.68x
J3304Injection, triamcinolone acetonide, preservative-free, extended-release, microsphere formulation, 1 mg11.4K$160.3K$14.112.08x
J9310Injection, rituximab, 100 mg222$128.3K$578.001.31x
99215Established patient office or other outpatient visit, 40-54 minutes386$52.2K$135.262.51x

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

Reston, VA

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 VA for peer comparison.

Phong Nguyen (you)
$22.2M
Elena Flagg, M.D.
$42.6M
Michael Strachan, M.D.
$36.6M
Show detailed table ▾
ProviderLocationTotal PaymentsStatus
Elena Flagg, M.D.Williamsburg, VA$42.6M✓ Clear
Michael Strachan, M.D.Richmond, VA$36.6M✓ 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.

Believe this data is inaccurate? Dispute this data