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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. Karen Garby
๐Ÿ“ก
MDIndividual

Karen Garby, M.D.

NPI: 1306835020
Mesa, AZ
10 years of data
Diagnostic Radiology
$3.9M
Total Payments
22.5K
Beneficiaries
27.6K
Services
4.64x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$3.9M
Specialty median$115.6K

๐Ÿ“‹ Key Findings

1Billed $3.9M over 10 years
24.64x markup ratio (above median)
399th percentile in Diagnostic Radiology by payments
4Payments surged 245% in 2015
520 procedures with >3x markup
โœ“ No flags detected

๐Ÿ”Ž Data Analysis

This provider's $3.9M in total Medicare payments ranks in the 99th percentile of Diagnostic Radiology providers nationally.

Medicare payments to this provider grew 2340% 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 245% 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$1.2K$298.834.08x$919.42$25.4K10389
2015$706.35$149.834.71x$556.52$87.6K847732
2016$851.51$158.445.37x$693.07$227.3K2.2K1.7K
2017$930.71$170.945.44x$759.77$253.3K2.5K2.0K
2018$819.40$151.245.42x$668.16$374.2K3.1K2.4K
2019$1.8K$366.224.92x$1.4K$577.6K3.8K3.0K
2020$1.5K$368.414.11x$1.1K$499.3K3.5K2.8K
2021$1.1K$286.113.95x$845.14$545.3K3.7K3.1K
2022$1.2K$303.124.07x$931.75$657.2K4.1K3.3K
2023$1.2K$310.853.94x$914.92$620.2K3.9K3.3K

Top Procedures (20)

93923Ultrasound study of arteries of both arms and legsโš  4.7x markup
$649.7K
7.7K services$84.65/svc4.69x markup
36482Chemical destruction of incompetent vein of arm or leg, accessed through the skin using imaging guidanceโš  3.8x markup
$475.3K
326 services$1.5K/svc3.78x markup
93970Ultrasound scan of veins of both arms or legs including assessment of compression and functional maneuversโš  4.9x markup
$441.2K
3.7K services$120.59/svc4.91x markup
93925Ultrasound study of arteries and arterial grafts of both legsโš  4.2x markup
$440.4K
2.5K services$177.02/svc4.15x markup
36465Injection of chemical agent into single incompetent vein of leg using ultrasound guidanceโš  3.9x markup
$302.4K
231 services$1.3K/svc3.87x markup
36475Destruction of insufficient vein of arm or leg, accessed through the skinโš  4.5x markup
$294.0K
244 services$1.2K/svc4.46x markup
93926Ultrasound study of arteries and arterial grafts of one leg or limitedโš  4.7x markup
$266.8K
2.8K services$95.85/svc4.73x markup
93979Ultrasound scan of blood flow of aorta, vena cava, bypass graphs, or one side of the groin or limited scanโš  7.5x markup
$243.8K
3.7K services$66.10/svc7.48x markup
36466Injection of chemical agent into multiple incompetent veins of same leg using ultrasound guidanceโš  4.0x markup
$220.9K
154 services$1.4K/svc4.00x markup
93971Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuversโš  5.6x markup
$98.0K
1.2K services$81.66/svc5.63x markup
99213Established patient office or other outpatient visit, typically 15 minutesโš  3.5x markup
$78.6K
1.3K services$59.03/svc3.50x markup
36471Injection of chemical agent into multiple veins of same legโš  4.5x markup
$56.6K
344 services$164.63/svc4.46x markup
93924Ultrasound study of arteries of both legs at rest and exerciseโš  4.3x markup
$52.3K
462 services$113.15/svc4.32x markup
93922Ultrasound study of arteries of both arms and legsโš  4.5x markup
$46.2K
874 services$52.91/svc4.52x markup
93880Ultrasound scanning of blood flow (outside the brain) on both sides of head and neckโš  4.8x markup
$37.2K
276 services$134.62/svc4.82x markup
37765Multiple incisions for removal of varicose veins of arm or legโš  8.5x markup
$36.8K
147 services$250.05/svc8.54x markup
99203New patient office or other outpatient visit, typically 30 minutesโš  3.7x markup
$30.0K
385 services$77.80/svc3.71x markup
99214Established patient office or other outpatient, visit typically 25 minutesโš  3.6x markup
$29.2K
344 services$84.96/svc3.60x markup
93978Ultrasound scan of vena cava or groin graft or vessel blood flowโš  4.5x markup
$14.8K
118 services$125.45/svc4.48x markup
76942Ultrasonic guidance imaging supervision and interpretation for insertion of needleโš  11.5x markup
$14.6K
326 services$44.75/svc11.51x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
93923Ultrasound study of arteries of both arms and legs7.7K$649.7K$84.654.69x
36482Chemical destruction of incompetent vein of arm or leg, accessed through the skin using imaging guidance326$475.3K$1.5K3.78x
93970Ultrasound scan of veins of both arms or legs including assessment of compression and functional maneuvers3.7K$441.2K$120.594.91x
93925Ultrasound study of arteries and arterial grafts of both legs2.5K$440.4K$177.024.15x
36465Injection of chemical agent into single incompetent vein of leg using ultrasound guidance231$302.4K$1.3K3.87x
36475Destruction of insufficient vein of arm or leg, accessed through the skin244$294.0K$1.2K4.46x
93926Ultrasound study of arteries and arterial grafts of one leg or limited2.8K$266.8K$95.854.73x
93979Ultrasound scan of blood flow of aorta, vena cava, bypass graphs, or one side of the groin or limited scan3.7K$243.8K$66.107.48x
36466Injection of chemical agent into multiple incompetent veins of same leg using ultrasound guidance154$220.9K$1.4K4.00x
93971Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuvers1.2K$98.0K$81.665.63x
99213Established patient office or other outpatient visit, typically 15 minutes1.3K$78.6K$59.033.50x
36471Injection of chemical agent into multiple veins of same leg344$56.6K$164.634.46x
93924Ultrasound study of arteries of both legs at rest and exercise462$52.3K$113.154.32x
93922Ultrasound study of arteries of both arms and legs874$46.2K$52.914.52x
93880Ultrasound scanning of blood flow (outside the brain) on both sides of head and neck276$37.2K$134.624.82x
37765Multiple incisions for removal of varicose veins of arm or leg147$36.8K$250.058.54x
99203New patient office or other outpatient visit, typically 30 minutes385$30.0K$77.803.71x
99214Established patient office or other outpatient, visit typically 25 minutes344$29.2K$84.963.60x
93978Ultrasound scan of vena cava or groin graft or vessel blood flow118$14.8K$125.454.48x
76942Ultrasonic guidance imaging supervision and interpretation for insertion of needle326$14.6K$44.7511.51x

Markup Analysis

Charge-to-Payment Ratio

4.64x

This provider submits charges 4.64 times higher than what Medicare actually pays.

What This Means

A markup ratio of 4.64x means for every $100 Medicare pays, this provider initially charges $464. This is higher than the national average.

Location

Mesa, AZ

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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