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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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Methodology•Download Data
  1. Home
  2. Providers
  3. Sam Kalioundji
❤️
MDIndividual

Sam Kalioundji, MD

NPI: 1619129426
Northridge, CA
9 years of data
Cardiology
$15.5M
Total Payments
359
Beneficiaries
149.2K
Services
3.02x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$15.5M
Specialty median$193.1K

📋 Key Findings

1Billed $15.5M over 9 years
23.02x markup ratio (above median)
399th percentile in Cardiology by payments
466 services/day — unusually high
5Payments surged 75% in 2016
68 procedures with >3x markup

This provider averages 66 services per working day

Based on 149.2K total services over 9 years (250 working days/year). Learn about impossible service volumes →

🔎 Data Analysis

This provider's $15.5M in total Medicare payments ranks in the 99th percentile of Cardiology providers nationally.

Averaging 66 services per working day raises questions about billing patterns.

Medicare payments to this provider grew 968% from 2015 to 2023.

AI-generated analysis based on Medicare payment data.

Annual Medicare Payments

Annual Services Provided

Avg Payment per Service

Markup Ratio Over Time

📈

Notable: Payments increased 75% 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 — the gap represents the markup.

YearAvg SubmittedAvg PaidMarkup RatioGap per ServiceTotal PaymentsServicesBeneficiaries
2015$300.60$109.012.76x$191.59$386.3K3.5K20
2016$281.48$103.782.71x$177.70$674.7K6.5K29
2017$286.15$99.692.87x$186.46$974.5K9.8K36
2018$250.87$85.612.93x$165.26$1.1M12.3K40
2019$300.36$94.893.17x$205.47$1.2M13.0K47
2020$341.61$115.372.96x$226.24$1.6M13.7K41
2021$320.35$108.222.96x$212.13$2.5M23.0K46
2022$306.40$101.413.02x$204.99$3.0M29.5K48
2023$343.78$109.113.15x$234.67$4.1M37.8K52

Top Procedures (20)

99233Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes⚠ 3.0x markup
$2.0M
22.2K services$90.97/svc3.05x markup
99214Established patient office or other outpatient visit, 30-39 minutes
$1.7M
15.8K services$104.39/svc2.08x markup
93306Ultrasound of heart with color-depicted blood flow, rate, direction and valve function⚠ 4.5x markup
$1.2M
11.7K services$99.31/svc4.49x markup
99223Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
$1.1M
6.6K services$166.20/svc2.53x markup
99291Critical care, first 30-74 minutes⚠ 3.3x markup
$761.4K
4.1K services$185.79/svc3.26x markup
78452Nuclear medicine studies of heart muscle at rest and with stress and spect
$718.0K
1.7K services$431.78/svc2.94x markup
93925Ultrasound of leg arteries or artery grafts
$643.9K
2.8K services$226.88/svc1.95x markup
99457Management using the results of remote vital sign monitoring per calendar month, first 20 minutes⚠ 4.2x markup
$515.1K
11.9K services$43.28/svc4.16x markup
93880Ultrasound of both sides of head and neck blood flow
$482.0K
2.9K services$167.70/svc2.09x markup
78492Nuclear medicine studies of blood flow in heart muscle at rest and with stress
$452.3K
327 services$1.4K/svc2.46x markup
93229Electrocardiogram (ecg) up to 30 days continuous with transmission of patient triggered events with review and report by health care professional⚠ 3.6x markup
$446.0K
552 services$807.91/svc3.65x markup
99232Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
$406.0K
6.8K services$60.14/svc2.94x markup
93970Ultrasound study of arm or leg veins with compression and maneuvers
$398.6K
2.8K services$142.75/svc2.45x markup
A9555Rubidium rb-82, diagnostic, per study dose, up to 60 millicuries
$394.2K
944 services$417.54/svc3.00x markup
33285Insertion of heart rhythm monitor under skin
$376.9K
107 services$3.5K/svc2.83x markup
92928Insertion of stents with balloon dilation of coronary artery or branch, single artery or branch
$304.9K
671 services$454.45/svc2.77x markup
99454Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days⚠ 4.0x markup
$304.7K
6.1K services$50.34/svc3.98x markup
93458Insertion of tube in left lower heart chamber and coronary artery for diagnosis with review by radiologist⚠ 4.2x markup
$289.2K
1.5K services$188.28/svc4.21x markup
99215Established patient office or other outpatient, visit typically 40 minutes
$278.1K
2.4K services$115.73/svc2.42x markup
99458Management using the results of remote vital sign monitoring per calendar month, each additional 20 minutes⚠ 3.4x markup
$270.4K
7.8K services$34.88/svc3.44x markup
Show detailed table ▾
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
99233Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes22.2K$2.0M$90.973.05x
99214Established patient office or other outpatient visit, 30-39 minutes15.8K$1.7M$104.392.08x
93306Ultrasound of heart with color-depicted blood flow, rate, direction and valve function11.7K$1.2M$99.314.49x
99223Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes6.6K$1.1M$166.202.53x
99291Critical care, first 30-74 minutes4.1K$761.4K$185.793.26x
78452Nuclear medicine studies of heart muscle at rest and with stress and spect1.7K$718.0K$431.782.94x
93925Ultrasound of leg arteries or artery grafts2.8K$643.9K$226.881.95x
99457Management using the results of remote vital sign monitoring per calendar month, first 20 minutes11.9K$515.1K$43.284.16x
93880Ultrasound of both sides of head and neck blood flow2.9K$482.0K$167.702.09x
78492Nuclear medicine studies of blood flow in heart muscle at rest and with stress327$452.3K$1.4K2.46x
93229Electrocardiogram (ecg) up to 30 days continuous with transmission of patient triggered events with review and report by health care professional552$446.0K$807.913.65x
99232Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes6.8K$406.0K$60.142.94x
93970Ultrasound study of arm or leg veins with compression and maneuvers2.8K$398.6K$142.752.45x
A9555Rubidium rb-82, diagnostic, per study dose, up to 60 millicuries944$394.2K$417.543.00x
33285Insertion of heart rhythm monitor under skin107$376.9K$3.5K2.83x
92928Insertion of stents with balloon dilation of coronary artery or branch, single artery or branch671$304.9K$454.452.77x
99454Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days6.1K$304.7K$50.343.98x
93458Insertion of tube in left lower heart chamber and coronary artery for diagnosis with review by radiologist1.5K$289.2K$188.284.21x
99215Established patient office or other outpatient, visit typically 40 minutes2.4K$278.1K$115.732.42x
99458Management using the results of remote vital sign monitoring per calendar month, each additional 20 minutes7.8K$270.4K$34.883.44x

Markup Analysis

Charge-to-Payment Ratio

3.02x

This provider submits charges 3.02 times higher than what Medicare actually pays.

What This Means

A markup ratio of 3.02x means for every $100 Medicare pays, this provider initially charges $302. This is higher than the national average.

Location

Northridge, CA

Provider Verification

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

Similar Providers

Other Cardiology providers in CA for peer comparison.

Sam Kalioundji (you)
$15.5M
Leo Polosajian, M.D.
$52.5M
Athar Ansari, M.D.
$38.2M
Hanumandla Reddy, M.D
$38.1M
Mehran Khorsandi, M.D.,
$36.4M
Shashi Sharma, D.M.
$35.4M
Show detailed table ▾
ProviderLocationTotal PaymentsStatus
Leo Polosajian, M.D.Reseda, CA$52.5M✓ Clear
Athar Ansari, M.D.El Centro, CA$38.2M✓ Clear
Hanumandla Reddy, M.DHanford, CA$38.1M✓ Clear
Mehran Khorsandi, M.D.,Los Angeles, CA$36.4M✓ Clear
Shashi Sharma, D.M.Visalia, CA$35.4M✓ Clear

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Data Sources

  • • Centers for Medicare & Medicaid Services (CMS)
  • • Medicare Provider Utilization and Payment Data (2014-2023)
  • • 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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