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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. Mark Gudesblatt
๐Ÿง 
MDIndividual

Mark Gudesblatt, M.D.

NPI: 1528030269
Islip, NY
10 years of data
Neurology
$6.3M
Total Payments
42.3K
Beneficiaries
103.7K
Services
2.92x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$6.3M
Specialty median$87.3K

๐Ÿ“‹ Key Findings

1Billed $6.3M over 10 years
22.92x markup ratio (above median)
399th percentile in Neurology by payments
4Payments surged 88% in 2019
54 procedures with >3x markup
โœ“ No flags detected

๐Ÿ”Ž Data Analysis

This provider's $6.3M in total Medicare payments ranks in the 99th percentile of Neurology providers nationally.

Medicare payments to this provider grew 67% 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 88% in 2019

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$207.07$96.392.15x$110.68$350.5K4.5K2.3K
2015$187.17$89.862.08x$97.31$327.9K4.4K2.0K
2016$162.56$80.302.02x$82.26$301.2K4.4K2.0K
2017$141.90$66.132.15x$75.77$365.1K5.7K2.6K
2018$154.15$69.642.21x$84.51$512.3K7.7K3.3K
2019$167.55$67.232.49x$100.32$963.0K15.6K6.5K
2020$163.30$61.732.65x$101.57$971.2K15.8K6.1K
2021$180.69$67.782.67x$112.91$991.6K16.9K6.1K
2022$174.78$61.742.83x$113.04$933.2K17.3K6.3K
2023$262.96$56.094.69x$206.87$586.8K11.5K5.2K

Top Procedures (20)

99215Established patient office or other outpatient, visit typically 40 minutes
$1.2M
9.0K services$130.57/svc2.00x markup
96365Infusion into a vein for therapy, prevention, or diagnosis up to 1 hourโš  4.8x markup
$945.4K
14.1K services$67.20/svc4.77x markup
96413Infusion of chemotherapy into a vein up to 1 hour
$723.4K
5.6K services$128.38/svc2.95x markup
96132Neuropsychological testing evaluation by qualified health care professional, first 60 minutes
$446.5K
3.8K services$117.91/svc3.00x markup
96522Refilling and maintenance of implantable pump or reservoir for drug delivery
$342.0K
2.8K services$121.27/svc1.87x markup
96001Three-dimensional, video-taped, computer-based gait analysis during walking
$339.6K
3.1K services$110.20/svc2.02x markup
96004Physician review interpretation and report of motion analysis during walking or functional activity
$330.6K
3.1K services$105.49/svc2.11x markup
99214Established patient office or other outpatient, visit typically 25 minutes
$274.8K
2.9K services$94.81/svc2.22x markup
96366Infusion into a vein for therapy, prevention, or diagnosis
$222.1K
11.3K services$19.66/svc2.63x markup
99205New patient office or other outpatient visit, typically 60 minutes
$220.1K
1.2K services$181.77/svc2.16x markup
96139Psychological or neuropsychological test administration and scoring by technician, additional 30 minutesโš  5.8x markup
$137.5K
3.8K services$35.74/svc5.76x markup
96138Psychological or neuropsychological test administration and scoring by technician, first 30 minutesโš  5.8x markup
$137.2K
3.9K services$35.28/svc5.84x markup
99223Initial hospital inpatient care, typically 70 minutes per day
$122.8K
682 services$180.09/svc2.78x markup
99233Subsequent hospital inpatient care, typically 35 minutes per day
$107.1K
1.1K services$95.68/svc1.93x markup
J2323Injection, natalizumab, 1 mg
$83.1K
5.3K services$15.66/svc1.57x markup
96119Neuropsychological testing by technician with interpretation and report by a qualified healthcare professional per hourโš  4.5x markup
$60.8K
844 services$72.03/svc4.51x markup
96375Injection of different drug or substance into a vein for therapy, diagnosis, or prevention
$57.4K
3.6K services$16.14/svc2.76x markup
99305Initial nursing facility visit, typically 35 minutes per day
$49.9K
439 services$113.74/svc1.41x markup
J1561Injection, immune globulin, (gamunex-c/gammaked), non-lyophilized (e.g. liquid), 500 mg
$46.8K
2.7K services$17.33/svc2.62x markup
99291Critical care delivery critically ill or injured patient, first 30-74 minutes
$44.0K
216 services$203.60/svc1.51x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
99215Established patient office or other outpatient, visit typically 40 minutes9.0K$1.2M$130.572.00x
96365Infusion into a vein for therapy, prevention, or diagnosis up to 1 hour14.1K$945.4K$67.204.77x
96413Infusion of chemotherapy into a vein up to 1 hour5.6K$723.4K$128.382.95x
96132Neuropsychological testing evaluation by qualified health care professional, first 60 minutes3.8K$446.5K$117.913.00x
96522Refilling and maintenance of implantable pump or reservoir for drug delivery2.8K$342.0K$121.271.87x
96001Three-dimensional, video-taped, computer-based gait analysis during walking3.1K$339.6K$110.202.02x
96004Physician review interpretation and report of motion analysis during walking or functional activity3.1K$330.6K$105.492.11x
99214Established patient office or other outpatient, visit typically 25 minutes2.9K$274.8K$94.812.22x
96366Infusion into a vein for therapy, prevention, or diagnosis11.3K$222.1K$19.662.63x
99205New patient office or other outpatient visit, typically 60 minutes1.2K$220.1K$181.772.16x
96139Psychological or neuropsychological test administration and scoring by technician, additional 30 minutes3.8K$137.5K$35.745.76x
96138Psychological or neuropsychological test administration and scoring by technician, first 30 minutes3.9K$137.2K$35.285.84x
99223Initial hospital inpatient care, typically 70 minutes per day682$122.8K$180.092.78x
99233Subsequent hospital inpatient care, typically 35 minutes per day1.1K$107.1K$95.681.93x
J2323Injection, natalizumab, 1 mg5.3K$83.1K$15.661.57x
96119Neuropsychological testing by technician with interpretation and report by a qualified healthcare professional per hour844$60.8K$72.034.51x
96375Injection of different drug or substance into a vein for therapy, diagnosis, or prevention3.6K$57.4K$16.142.76x
99305Initial nursing facility visit, typically 35 minutes per day439$49.9K$113.741.41x
J1561Injection, immune globulin, (gamunex-c/gammaked), non-lyophilized (e.g. liquid), 500 mg2.7K$46.8K$17.332.62x
99291Critical care delivery critically ill or injured patient, first 30-74 minutes216$44.0K$203.601.51x

Markup Analysis

Charge-to-Payment Ratio

2.92x

This provider submits charges 2.92 times higher than what Medicare actually pays.

What This Means

A markup ratio of 2.92x means for every $100 Medicare pays, this provider initially charges $292. This is higher than the national average.

Location

Islip, NY

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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