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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. Mary Mulcahy
๐ŸŽ—๏ธ
MDIndividual

Mary Mulcahy, MD

NPI: 1306870837
Chicago, IL
10 years of data
Medical Oncology
$38.2M
Total Payments
403
Beneficiaries
1.3M
Services
3.45x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$38.2M
Specialty median$262.8K
Rank #8 of 17 in specialty

๐Ÿ“‹ Key Findings

1Billed $38.2M over 10 years
23.45x markup ratio (above median)
3Risk score: 71 โ€” flagged for review
499th percentile in Medical Oncology by payments
5511 services/day โ€” physically implausible
6Payments surged 71% in 2016

โš ๏ธ Flagged for Review

Risk Score: 71
  • 70x specialty median spending
  • Markup 23.8x (specialty median: 4.3x)
  • 10x specialty median beneficiaries
  • 283x specialty median services
View Deep Dives โ†’Report Fraud โ†’

Statistical flag only โ€” not an accusation of fraud

โš ๏ธ This provider averages 511 services per working day โ€” physically unusual for an individual practitioner

Based on 1.3M total services over 10 years (250 working days/year). Learn about impossible service volumes โ†’

๐Ÿ”Ž Data Analysis

This provider's $38.2M in total Medicare payments ranks in the 99th percentile of Medical Oncology providers nationally.

Averaging 511 services per working day raises questions about billing patterns.

Medicare payments to this provider grew 103% from 2014 to 2023.

This provider has been statistically flagged with a risk score of 71/100. Statistical flags are not accusations of fraud.

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 71% 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 โ€” the gap represents the markup.

YearAvg SubmittedAvg PaidMarkup RatioGap per ServiceTotal PaymentsServicesBeneficiaries
2014$91.61$16.865.43x$74.75$1.6M93.4K47
2015$94.36$17.935.26x$76.43$1.2M69.0K37
2016$100.68$23.764.24x$76.92$2.1M89.1K40
2017$115.43$39.202.94x$76.23$3.0M75.6K38
2018$120.84$50.132.41x$70.71$3.9M78.2K36
2019$90.64$30.023.02x$60.62$6.3M209.8K43
2020$106.62$35.053.04x$71.57$7.4M212.1K48
2021$103.02$38.962.64x$64.06$5.9M151.4K36
2022$107.46$23.634.55x$83.83$3.5M148.4K42
2023$108.21$21.145.12x$87.07$3.2M151.3K36

Top Procedures (20)

G9678Oncology care model (ocm) monthly enhanced oncology services (meos) payment for ocm enhanced services. g9678 payments may only be made to ocm practitioners for ocm beneficiaries for the furnishment of enhanced services as defined in the ocm participation a
$13.2M
83.5K services$158.31/svc1.01x markup
J9144Injection, daratumumab, 10 mg and hyaluronidase-fihjโš  4.6x markup
$2.8M
75.6K services$36.97/svc4.60x markup
J9271Injection, pembrolizumab, 1 mgโš  4.2x markup
$2.8M
68.2K services$40.60/svc4.21x markup
J2353Injection, octreotide, depot form for intramuscular injection, 1 mgโš  3.5x markup
$2.0M
13.4K services$145.18/svc3.47x markup
J1569Injection, immune globulin, (gammagard liquid), non-lyophilized, (e.g., liquid), 500 mgโš  4.0x markup
$1.6M
46.7K services$33.33/svc4.02x markup
J9047Injection, carfilzomib, 1 mgโš  4.2x markup
$1.6M
55.2K services$28.16/svc4.19x markup
J9145Injection, daratumumab, 10 mgโš  4.3x markup
$1.4M
33.6K services$42.44/svc4.31x markup
J9310Injection, rituximab, 100 mgโš  4.3x markup
$1.4M
2.3K services$605.42/svc4.25x markup
J9299Injection, nivolumab, 1 mgโš  4.3x markup
$1.4M
62.3K services$22.24/svc4.31x markup
J9041Injection, bortezomib, 0.1 mgโš  5.5x markup
$1.2M
39.5K services$31.56/svc5.51x markup
J2505Injection, pegfilgrastim, 6 mg
$1.1M
369 services$3.0K/svc2.86x markup
J0897Injection, denosumab, 1 mgโš  3.8x markup
$1.1M
69.5K services$15.46/svc3.75x markup
J9312Injection, rituximab, 10 mgโš  3.5x markup
$799.4K
10.9K services$73.20/svc3.52x markup
J9035Injection, bevacizumab, 10 mgโš  4.0x markup
$771.0K
13.4K services$57.47/svc4.00x markup
96413Administration of chemotherapy into vein, 1 hour or lessโš  8.1x markup
$545.1K
4.7K services$115.44/svc8.14x markup
J9305Injection, pemetrexed, not otherwise specified, 10 mgโš  4.0x markup
$428.2K
7.5K services$56.76/svc3.98x markup
99214Established patient office or other outpatient visit, 30-39 minutesโš  3.6x markup
$402.9K
4.5K services$88.86/svc3.62x markup
J9999Not otherwise classified, antineoplastic drugsโš  4.5x markup
$306.0K
94 services$3.3K/svc4.54x markup
J9022Injection, atezolizumab, 10 mgโš  4.5x markup
$293.5K
4.6K services$63.69/svc4.52x markup
J0881Injection, darbepoetin alfa, 1 microgram (non-esrd use)โš  4.9x markup
$208.7K
72.6K services$2.87/svc4.87x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
G9678Oncology care model (ocm) monthly enhanced oncology services (meos) payment for ocm enhanced services. g9678 payments may only be made to ocm practitioners for ocm beneficiaries for the furnishment of enhanced services as defined in the ocm participation a83.5K$13.2M$158.311.01x
J9144Injection, daratumumab, 10 mg and hyaluronidase-fihj75.6K$2.8M$36.974.60x
J9271Injection, pembrolizumab, 1 mg68.2K$2.8M$40.604.21x
J2353Injection, octreotide, depot form for intramuscular injection, 1 mg13.4K$2.0M$145.183.47x
J1569Injection, immune globulin, (gammagard liquid), non-lyophilized, (e.g., liquid), 500 mg46.7K$1.6M$33.334.02x
J9047Injection, carfilzomib, 1 mg55.2K$1.6M$28.164.19x
J9145Injection, daratumumab, 10 mg33.6K$1.4M$42.444.31x
J9310Injection, rituximab, 100 mg2.3K$1.4M$605.424.25x
J9299Injection, nivolumab, 1 mg62.3K$1.4M$22.244.31x
J9041Injection, bortezomib, 0.1 mg39.5K$1.2M$31.565.51x
J2505Injection, pegfilgrastim, 6 mg369$1.1M$3.0K2.86x
J0897Injection, denosumab, 1 mg69.5K$1.1M$15.463.75x
J9312Injection, rituximab, 10 mg10.9K$799.4K$73.203.52x
J9035Injection, bevacizumab, 10 mg13.4K$771.0K$57.474.00x
96413Administration of chemotherapy into vein, 1 hour or less4.7K$545.1K$115.448.14x
J9305Injection, pemetrexed, not otherwise specified, 10 mg7.5K$428.2K$56.763.98x
99214Established patient office or other outpatient visit, 30-39 minutes4.5K$402.9K$88.863.62x
J9999Not otherwise classified, antineoplastic drugs94$306.0K$3.3K4.54x
J9022Injection, atezolizumab, 10 mg4.6K$293.5K$63.694.52x
J0881Injection, darbepoetin alfa, 1 microgram (non-esrd use)72.6K$208.7K$2.874.87x

Markup Analysis

Charge-to-Payment Ratio

3.45x

This provider submits charges 3.45 times higher than what Medicare actually pays.

What This Means

A markup ratio of 3.45x means for every $100 Medicare pays, this provider initially charges $345. This is higher than the national average.

Location

Chicago, IL

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 Medical Oncology providers in IL for peer comparison.

Mary Mulcahy (you)
$38.2M
Philip Dy, M.D.
$52.8M
Refat Baridi, MD
$33.5M
Show detailed table โ–พ
ProviderLocationTotal PaymentsStatus
Philip Dy, M.D.Effingham, IL$52.8Mโœ“ Clear
Refat Baridi, MDWoodridge, IL$33.5Mโœ“ Clear

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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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