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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. Luis Diaz
๐Ÿง 
MDIndividual

Luis Diaz, M.D.

NPI: 1457356461
Las Vegas, NV
10 years of data
Neurology
$30.5M
Total Payments
169
Beneficiaries
1.1M
Services
3.6x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$30.5M
Specialty median$87.3K

๐Ÿ“‹ Key Findings

1Billed $30.5M over 10 years
23.6x markup ratio (above median)
399th percentile in Neurology by payments
4435 services/day โ€” physically implausible
5Payments surged 234% in 2015
614 procedures with >3x markup

โš ๏ธ This provider averages 435 services per working day โ€” physically unusual for an individual practitioner

Based on 1.1M total services over 10 years (250 working days/year). Learn about impossible service volumes โ†’

๐Ÿ”Ž Data Analysis

This provider's $30.5M in total Medicare payments ranks in the 99th percentile of Neurology providers nationally.

Averaging 435 services per working day raises questions about billing patterns.

Medicare payments to this provider grew 1728% 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 234% 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 โ€” the gap represents the markup.

YearAvg SubmittedAvg PaidMarkup RatioGap per ServiceTotal PaymentsServicesBeneficiaries
2014$21.24$8.592.47x$12.65$302.4K35.2K17
2015$46.96$14.033.35x$32.93$1.0M72.1K16
2016$82.86$22.483.69x$60.38$2.3M104.1K17
2017$85.76$24.083.56x$61.68$3.0M125.4K17
2018$94.63$26.843.53x$67.79$3.4M125.4K18
2019$96.43$25.923.72x$70.51$3.6M139.2K20
2020$98.10$27.843.52x$70.26$3.4M123.9K17
2021$103.46$31.873.25x$71.59$3.9M122.2K16
2022$115.28$31.803.63x$83.48$3.9M124.0K15
2023$187.47$47.653.93x$139.82$5.5M116.0K16

Top Procedures (20)

J1561Injection, immune globulin, (gamunex-c/gammaked), non-lyophilized (e.g., liquid), 500 mgโš  3.5x markup
$7.7M
243.1K services$31.86/svc3.53x markup
J1568Injection, immune globulin, (octagam), intravenous, non-lyophilized (e.g., liquid), 500 mgโš  3.6x markup
$7.0M
218.1K services$31.88/svc3.59x markup
J1556Injection, immune globulin (bivigam), 500 mgโš  4.0x markup
$6.7M
152.4K services$43.98/svc4.01x markup
J2350Injection, ocrelizumab, 1 mgโš  3.7x markup
$4.5M
101.7K services$44.22/svc3.68x markup
J0585Injection, onabotulinumtoxina, 1 unit
$947.2K
215.2K services$4.40/svc1.61x markup
J1557Injection, immune globulin, (gammaplex), intravenous, non-lyophilized (e.g., liquid), 500 mgโš  3.8x markup
$885.7K
29.9K services$29.63/svc3.78x markup
J2323Injection, natalizumab, 1 mgโš  3.2x markup
$510.9K
37.5K services$13.62/svc3.22x markup
99214Established patient office or other outpatient visit, 30-39 minutes
$393.9K
5.1K services$77.46/svc2.25x markup
96365Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or lessโš  3.5x markup
$305.8K
5.6K services$54.97/svc3.46x markup
J3590Unclassified biologicsโš  3.5x markup
$278.9K
20 services$13.9K/svc3.50x markup
95886Needle measurement of electrical activity in arm or leg muscles, complete studyโš  3.8x markup
$225.6K
3.1K services$71.65/svc3.80x markup
J0588Injection, incobotulinumtoxin a, 1 unit
$203.5K
56.4K services$3.61/svc1.86x markup
99204New patient office or other outpatient visit, 45-59 minutesโš  3.3x markup
$191.3K
1.6K services$117.68/svc3.26x markup
96366Infusion into a vein for therapy, prevention, or diagnosis, each additional hourโš  6.1x markup
$183.2K
11.3K services$16.16/svc6.11x markup
95910Nerve conduction, 7-8 studies
$125.0K
841 services$148.68/svc2.13x markup
64615Injection of chemical for paralysis of facial and neck nerve muscles on both sides of faceโš  4.7x markup
$60.1K
552 services$108.87/svc4.72x markup
95819Measurement of brain wave activity (eeg), awake and asleep
$44.5K
135 services$329.84/svc2.14x markup
95909Nerve conduction, 5-6 studies
$35.9K
323 services$111.29/svc2.08x markup
95874Needle measurement of electrical activity in muscle with injection of chemical for paralysis of nerve muscleโš  6.1x markup
$29.6K
573 services$51.65/svc6.07x markup
96413Administration of chemotherapy into vein, 1 hour or lessโš  5.0x markup
$27.6K
260 services$106.28/svc5.01x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
J1561Injection, immune globulin, (gamunex-c/gammaked), non-lyophilized (e.g., liquid), 500 mg243.1K$7.7M$31.863.53x
J1568Injection, immune globulin, (octagam), intravenous, non-lyophilized (e.g., liquid), 500 mg218.1K$7.0M$31.883.59x
J1556Injection, immune globulin (bivigam), 500 mg152.4K$6.7M$43.984.01x
J2350Injection, ocrelizumab, 1 mg101.7K$4.5M$44.223.68x
J0585Injection, onabotulinumtoxina, 1 unit215.2K$947.2K$4.401.61x
J1557Injection, immune globulin, (gammaplex), intravenous, non-lyophilized (e.g., liquid), 500 mg29.9K$885.7K$29.633.78x
J2323Injection, natalizumab, 1 mg37.5K$510.9K$13.623.22x
99214Established patient office or other outpatient visit, 30-39 minutes5.1K$393.9K$77.462.25x
96365Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less5.6K$305.8K$54.973.46x
J3590Unclassified biologics20$278.9K$13.9K3.50x
95886Needle measurement of electrical activity in arm or leg muscles, complete study3.1K$225.6K$71.653.80x
J0588Injection, incobotulinumtoxin a, 1 unit56.4K$203.5K$3.611.86x
99204New patient office or other outpatient visit, 45-59 minutes1.6K$191.3K$117.683.26x
96366Infusion into a vein for therapy, prevention, or diagnosis, each additional hour11.3K$183.2K$16.166.11x
95910Nerve conduction, 7-8 studies841$125.0K$148.682.13x
64615Injection of chemical for paralysis of facial and neck nerve muscles on both sides of face552$60.1K$108.874.72x
95819Measurement of brain wave activity (eeg), awake and asleep135$44.5K$329.842.14x
95909Nerve conduction, 5-6 studies323$35.9K$111.292.08x
95874Needle measurement of electrical activity in muscle with injection of chemical for paralysis of nerve muscle573$29.6K$51.656.07x
96413Administration of chemotherapy into vein, 1 hour or less260$27.6K$106.285.01x

Markup Analysis

Charge-to-Payment Ratio

3.6x

This provider submits charges 3.6 times higher than what Medicare actually pays.

What This Means

A markup ratio of 3.6x means for every $100 Medicare pays, this provider initially charges $360. This is higher than the national average.

Location

Las Vegas, NV

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.

Believe this data is inaccurate? Dispute this data