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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. James Simsarian
๐Ÿง 
MDIndividual

James Simsarian, M.D.

NPI: 1235108986
Fairfax, VA
10 years of data
Neurology
$19.2M
Total Payments
170
Beneficiaries
508.7K
Services
2.2x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$19.2M
Specialty median$87.3K

๐Ÿ“‹ Key Findings

1Billed $19.2M over 10 years
22.2x markup ratio (above median)
399th percentile in Neurology by payments
4203 services/day โ€” physically implausible
5Payments surged 85% in 2016
66 procedures with >3x markup

โš ๏ธ This provider averages 203 services per working day โ€” physically unusual for an individual practitioner

Based on 508.7K total services over 10 years (250 working days/year). Learn about impossible service volumes โ†’

๐Ÿ”Ž Data Analysis

This provider's $19.2M in total Medicare payments ranks in the 99th percentile of Neurology providers nationally.

Averaging 203 services per working day raises questions about billing patterns.

Medicare payments to this provider grew 1485% from 2014 to 2023.

81% of their billing comes from a single procedure code (J2350 โ€” Injection, ocrelizumab, 1 mg).

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 85% 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 โ€” the gap represents the markup.

YearAvg SubmittedAvg PaidMarkup RatioGap per ServiceTotal PaymentsServicesBeneficiaries
2014$253.20$90.102.81x$163.10$242.3K2.7K18
2015$38.70$13.562.85x$25.14$415.4K30.6K15
2016$31.83$14.602.18x$17.23$767.4K52.6K12
2017$33.44$16.941.97x$16.50$866.1K51.1K15
2018$110.36$46.022.40x$64.34$1.3M27.3K20
2019$102.52$43.992.33x$58.53$2.0M46.1K17
2020$100.04$44.722.24x$55.32$2.8M63.5K17
2021$98.09$46.352.12x$51.74$3.1M67.6K18
2022$97.55$46.002.12x$51.55$3.8M83.7K18
2023$97.79$45.982.13x$51.81$3.8M83.5K20

Top Procedures (20)

J2350Injection, ocrelizumab, 1 mg
$15.5M
354.3K services$43.81/svc2.09x markup
J2323Injection, natalizumab, 1 mg
$1.4M
126.6K services$11.38/svc1.85x markup
99214Established patient office or other outpatient visit, 30-39 minutes
$554.2K
6.2K services$89.13/svc2.84x markup
93880Ultrasound of both sides of head and neck blood flow
$479.9K
2.7K services$178.66/svc2.83x markup
99215Established patient office or other outpatient visit, 40-54 minutes
$264.0K
2.2K services$121.15/svc2.84x markup
96413Administration of chemotherapy into vein, 1 hour or lessโš  3.1x markup
$175.2K
1.5K services$119.27/svc3.13x markup
95812Measurement of brain wave (eeg) activity, 41-60 minutes
$143.5K
439 services$326.95/svc2.19x markup
95957Digital analysis of electrical brain wave activity (EEG)
$117.5K
410 services$286.62/svc2.60x markup
96365Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or lessโš  4.3x markup
$77.7K
1.3K services$60.67/svc4.34x markup
99213Established patient office or other outpatient visit, 20-29 minutes
$76.7K
1.1K services$67.78/svc2.71x markup
96415Administration of chemotherapy into vein, each additional hourโš  11.9x markup
$62.7K
2.5K services$25.61/svc11.87x markup
95819Measurement of brain wave activity (eeg), awake and asleep
$42.6K
102 services$417.82/svc2.55x markup
99212Established patient office or other outpatient visit, 10-19 minutes
$39.5K
1.0K services$37.81/svc2.71x markup
93971Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuversโš  3.5x markup
$32.6K
313 services$104.30/svc3.48x markup
93970Ultrasound study of arm or leg veins with compression and maneuvers
$30.5K
173 services$176.48/svc2.49x markup
96374Injection of drug or substance into vein
$27.0K
737 services$36.58/svc1.93x markup
99205New patient office or other outpatient visit, 60-74 minutesโš  3.0x markup
$24.4K
143 services$170.78/svc3.02x markup
95816Measurement of brain wave activity (eeg), awake and drowsy
$24.3K
65 services$374.59/svc2.59x markup
93924Ultrasound of leg arteries at rest and after exercise
$16.9K
111 services$151.92/svc2.50x markup
96366Infusion into a vein for therapy, prevention, or diagnosisโš  12.2x markup
$13.9K
890 services$15.57/svc12.20x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
J2350Injection, ocrelizumab, 1 mg354.3K$15.5M$43.812.09x
J2323Injection, natalizumab, 1 mg126.6K$1.4M$11.381.85x
99214Established patient office or other outpatient visit, 30-39 minutes6.2K$554.2K$89.132.84x
93880Ultrasound of both sides of head and neck blood flow2.7K$479.9K$178.662.83x
99215Established patient office or other outpatient visit, 40-54 minutes2.2K$264.0K$121.152.84x
96413Administration of chemotherapy into vein, 1 hour or less1.5K$175.2K$119.273.13x
95812Measurement of brain wave (eeg) activity, 41-60 minutes439$143.5K$326.952.19x
95957Digital analysis of electrical brain wave activity (EEG)410$117.5K$286.622.60x
96365Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less1.3K$77.7K$60.674.34x
99213Established patient office or other outpatient visit, 20-29 minutes1.1K$76.7K$67.782.71x
96415Administration of chemotherapy into vein, each additional hour2.5K$62.7K$25.6111.87x
95819Measurement of brain wave activity (eeg), awake and asleep102$42.6K$417.822.55x
99212Established patient office or other outpatient visit, 10-19 minutes1.0K$39.5K$37.812.71x
93971Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuvers313$32.6K$104.303.48x
93970Ultrasound study of arm or leg veins with compression and maneuvers173$30.5K$176.482.49x
96374Injection of drug or substance into vein737$27.0K$36.581.93x
99205New patient office or other outpatient visit, 60-74 minutes143$24.4K$170.783.02x
95816Measurement of brain wave activity (eeg), awake and drowsy65$24.3K$374.592.59x
93924Ultrasound of leg arteries at rest and after exercise111$16.9K$151.922.50x
96366Infusion into a vein for therapy, prevention, or diagnosis890$13.9K$15.5712.20x

Markup Analysis

Charge-to-Payment Ratio

2.2x

This provider submits charges 2.2 times higher than what Medicare actually pays.

What This Means

A markup ratio of 2.2x means for every $100 Medicare pays, this provider initially charges $220. This is higher than the national average.

Location

Fairfax, VA

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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