OpenMedicare
Start Here
Explore
Fraud
Investigations
Data
Tools
About

Footer

OpenMedicare

Independent Medicare data journalism

Sister Sites

  • OpenMedicaid
  • OpenFeds
  • OpenSpending

Explore

  • Providers
  • Procedures
  • States
  • Specialties
  • Search

Fraud Analysis

  • Still Out There (AI)
  • Fraud Overview
  • Fraud Watchlist
  • Deep Dive Profiles
  • Impossible Numbers
  • Report Fraud

Investigations

  • The Algorithm Knows
  • How We Built the Model
  • Internal Medicine Crisis
  • Florida & California Fraud
  • Million Dollar Flagged
  • All Investigations

Tools

  • Provider Lookup
  • Compare
  • Cost Calculator
  • Your Medicare Dollar
  • Downloads

About

  • About OpenMedicare
  • Methodology
  • Glossary
  • Data Sources
  • API Docs
  • Updates
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. George Giannakopoulos
๐Ÿง 
MDIndividual

George Giannakopoulos, MD

NPI: 1932137650
Hudson, FL
10 years of data
Neurosurgery
$3.8M
Total Payments
20.6K
Beneficiaries
35.7K
Services
10.7x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$3.8M
Specialty median$71.9K

๐Ÿ“‹ Key Findings

1Billed $3.8M over 10 years
210.7x markup ratio (above median)
399th percentile in Neurosurgery by payments
419 procedures with >3x markup
โœ“ No flags detected

๐Ÿ”Ž Data Analysis

This provider's $3.8M in total Medicare payments ranks in the 99th percentile of Neurosurgery providers nationally.

Their average markup ratio of 10.7x is significantly above the specialty median of 5.9x.

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 โ€” the gap represents the markup.

YearAvg SubmittedAvg PaidMarkup RatioGap per ServiceTotal PaymentsServicesBeneficiaries
2014$2.4K$186.7812.94x$2.2K$390.6K4.7K2.7K
2015$4.9K$340.7514.41x$4.6K$509.1K5.1K2.8K
2016$4.3K$284.8715.14x$4.0K$548.4K5.4K3.0K
2017$3.9K$228.9417.02x$3.7K$434.5K4.3K2.6K
2018$3.3K$238.3014.04x$3.1K$403.2K3.7K2.3K
2019$3.0K$227.3113.16x$2.8K$400.9K3.5K2.0K
2020$2.8K$210.3313.46x$2.6K$334.5K3.0K1.7K
2021$3.3K$245.4213.42x$3.0K$284.8K2.3K1.3K
2022$2.9K$241.7311.87x$2.6K$240.7K1.9K1.1K
2023$2.9K$224.2512.98x$2.7K$223.0K1.9K1.1K

Top Procedures (20)

64493Injections of lower or sacral spine facet joint using imaging guidanceโš  6.1x markup
$587.6K
4.5K services$130.81/svc6.13x markup
22612Fusion of lower spine bones, posterior or posterolateral approachโš  9.2x markup
$437.8K
335 services$1.3K/svc9.16x markup
64494Injections of lower or sacral spine facet joint using imaging guidanceโš  7.2x markup
$371.0K
4.5K services$83.24/svc7.22x markup
62323Injection of substance into spinal canal of lower back or sacrum using imaging guidanceโš  14.2x markup
$341.8K
2.8K services$121.00/svc14.20x markup
64495Injections of lower or sacral spine facet joint using imaging guidanceโš  7.7x markup
$278.9K
3.6K services$78.05/svc7.70x markup
99204New patient office or other outpatient visit, typically 45 minutesโš  6.7x markup
$278.8K
2.3K services$119.90/svc6.67x markup
62311Injections of substances into lower or sacral spineโš  13.4x markup
$219.7K
1.7K services$128.02/svc13.42x markup
63047Partial removal of middle spine bone with release of spinal cord and/or nervesโš  29.6x markup
$172.1K
355 services$484.69/svc29.56x markup
99213Established patient office or other outpatient visit, typically 15 minutesโš  5.6x markup
$151.1K
2.8K services$53.90/svc5.58x markup
99223Initial hospital inpatient care, typically 70 minutes per dayโš  6.5x markup
$139.4K
903 services$154.40/svc6.48x markup
99212Established patient office or other outpatient visit, typically 10 minutesโš  6.5x markup
$97.3K
3.2K services$30.52/svc6.55x markup
64635Destruction of lower or sacral spinal facet joint nerves using imaging guidanceโš  3.7x markup
$94.3K
256 services$368.51/svc3.67x markup
63030Partial removal of bone with release of spinal cord or spinal nerves of 1 interspace in lower spineโš  22.7x markup
$82.9K
189 services$438.55/svc22.68x markup
63048Partial removal of spine bone with release of spinal cord and/or nervesโš  50.7x markup
$77.4K
432 services$179.16/svc50.68x markup
22614Fusion of spine bones, posterior or posterolateral approachโš  12.1x markup
$71.2K
215 services$331.01/svc12.08x markup
99233Subsequent hospital inpatient care, typically 35 minutes per dayโš  7.3x markup
$49.1K
598 services$82.14/svc7.30x markup
64636Destruction of lower or sacral spinal facet joint nerves with imaging guidanceโš  4.3x markup
$42.8K
255 services$167.97/svc4.29x 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
$36.0K
891 services$40.41/svc2.91x markup
63081Removal of upper spine bone with release of spinal cord and/or nerves, anterior approachโš  9.5x markup
$33.9K
23 services$1.5K/svc9.49x markup
22845Insertion of anterior spinal instrumentation for spinal stabilization, 2 to 3 vertebral segmentsโš  19.4x markup
$26.0K
42 services$619.96/svc19.36x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
64493Injections of lower or sacral spine facet joint using imaging guidance4.5K$587.6K$130.816.13x
22612Fusion of lower spine bones, posterior or posterolateral approach335$437.8K$1.3K9.16x
64494Injections of lower or sacral spine facet joint using imaging guidance4.5K$371.0K$83.247.22x
62323Injection of substance into spinal canal of lower back or sacrum using imaging guidance2.8K$341.8K$121.0014.20x
64495Injections of lower or sacral spine facet joint using imaging guidance3.6K$278.9K$78.057.70x
99204New patient office or other outpatient visit, typically 45 minutes2.3K$278.8K$119.906.67x
62311Injections of substances into lower or sacral spine1.7K$219.7K$128.0213.42x
63047Partial removal of middle spine bone with release of spinal cord and/or nerves355$172.1K$484.6929.56x
99213Established patient office or other outpatient visit, typically 15 minutes2.8K$151.1K$53.905.58x
99223Initial hospital inpatient care, typically 70 minutes per day903$139.4K$154.406.48x
99212Established patient office or other outpatient visit, typically 10 minutes3.2K$97.3K$30.526.55x
64635Destruction of lower or sacral spinal facet joint nerves using imaging guidance256$94.3K$368.513.67x
63030Partial removal of bone with release of spinal cord or spinal nerves of 1 interspace in lower spine189$82.9K$438.5522.68x
63048Partial removal of spine bone with release of spinal cord and/or nerves432$77.4K$179.1650.68x
22614Fusion of spine bones, posterior or posterolateral approach215$71.2K$331.0112.08x
99233Subsequent hospital inpatient care, typically 35 minutes per day598$49.1K$82.147.30x
64636Destruction of lower or sacral spinal facet joint nerves with imaging guidance255$42.8K$167.974.29x
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 imple891$36.0K$40.412.91x
63081Removal of upper spine bone with release of spinal cord and/or nerves, anterior approach23$33.9K$1.5K9.49x
22845Insertion of anterior spinal instrumentation for spinal stabilization, 2 to 3 vertebral segments42$26.0K$619.9619.36x

Markup Analysis

Charge-to-Payment Ratio

10.7x

This provider submits charges 10.7 times higher than what Medicare actually pays.

What This Means

A markup ratio of 10.7x means for every $100 Medicare pays, this provider initially charges $1070. This is higher than the national average.

Location

Hudson, FL

Provider Verification

Always verify provider credentials and location before scheduling appointments. This data reflects Medicare payments and may not include all practice locations.

Related

Browse
โ† Back to Provider Directory
State
All providers in FL โ†’
Specialty
All Neurosurgery providers โ†’
Tool
Compare this provider โ†’
Analysis
Fraud Watchlist โ†’
Search
Search all providers โ†’

Share This Provider

Share this provider's Medicare payment information

Share:

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