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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. William Sharfman
๐ŸŽ—๏ธ
MDIndividual

William Sharfman, M.D.

NPI: 1760413652
Lutherville, MD
10 years of data
Medical Oncology
$32.0M
Total Payments
217
Beneficiaries
1.1M
Services
3.27x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$32.0M
Specialty median$262.8K

๐Ÿ“‹ Key Findings

1Billed $32.0M over 10 years
23.27x markup ratio (above median)
399th percentile in Medical Oncology by payments
4425 services/day โ€” physically implausible
5Payments surged 150% in 2023
610 procedures with >3x markup

โš ๏ธ This provider averages 425 services per working day โ€” physically unusual for an individual practitioner

Based on 1.1M total services over 10 years (250 working days/year). Learn about impossible service volumes โ†’

๐Ÿ”Ž Data Analysis

This provider's $32.0M in total Medicare payments ranks in the 99th percentile of Medical Oncology providers nationally.

Averaging 425 services per working day raises questions about billing patterns.

Medicare payments to this provider grew 600% 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 150% in 2023

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$265.63$84.163.16x$181.47$1.3M15.5K11
2015$740.77$157.784.69x$582.99$1.2M7.4K15
2016$90.42$27.953.24x$62.47$2.3M82.6K16
2017$55.55$18.363.03x$37.19$1.8M99.4K17
2018$86.54$26.763.23x$59.78$2.3M85.6K29
2019$83.87$24.863.37x$59.01$2.6M105.9K23
2020$78.98$25.343.12x$53.64$3.4M133.1K26
2021$82.74$26.413.13x$56.33$4.3M161.1K30
2022$79.81$24.573.25x$55.24$3.7M149.0K28
2023$134.12$40.833.28x$93.29$9.1M223.8K22

Top Procedures (20)

J9299Injection, nivolumab, 1 mgโš  3.5x markup
$9.4M
472.0K services$19.97/svc3.53x markup
J9271Injection, pembrolizumab, 1 mg
$7.2M
213.2K services$33.69/svc2.95x markup
J9228Injection, ipilimumab, 1 mg
$4.7M
43.3K services$109.28/svc2.75x markup
J9298Injection, nivolumab and relatlimab-rmbw, 3 mg/1 mg
$3.4M
23.7K services$142.92/svc2.95x markup
J9144Injection, daratumumab, 10 mg and hyaluronidase-fihjโš  3.3x markup
$1.0M
26.8K services$37.92/svc3.31x markup
J9119Injection, cemiplimab-rwlc, 1 mgโš  5.2x markup
$913.1K
45.5K services$20.07/svc5.15x markup
96413Administration of chemotherapy into vein, 1 hour or lessโš  3.5x markup
$708.4K
6.0K services$118.62/svc3.48x markup
J3490Unclassified drugsโš  4.9x markup
$698.6K
126 services$5.5K/svc4.87x markup
99214Established patient office or other outpatient visit, 30-39 minutes
$583.0K
6.4K services$91.08/svc2.69x markup
J2505Injection, pegfilgrastim, 6 mgโš  3.2x markup
$453.0K
147 services$3.1K/svc3.23x markup
J9145Injection, daratumumab, 10 mg
$352.5K
8.0K services$44.05/svc2.69x markup
J9999Not otherwise classified, antineoplastic drugsโš  5.2x markup
$298.9K
63 services$4.7K/svc5.22x markup
J9264Injection, paclitaxel protein-bound particles, 1 mg
$266.0K
24.5K services$10.87/svc2.54x markup
J9355Injection, trastuzumab, 10 mgโš  4.0x markup
$229.7K
3.0K services$77.83/svc4.02x markup
J9310Injection, rituximab, 100 mg
$186.1K
267 services$697.07/svc2.97x markup
J0897Injection, denosumab, 1 mgโš  4.0x markup
$169.9K
11.1K services$15.30/svc4.03x markup
J9305Injection, pemetrexed, 10 mg
$152.1K
2.8K services$53.92/svc2.98x markup
J1930Injection, lanreotide, 1 mg
$143.8K
2.6K services$54.46/svc2.85x markup
99213Established patient office or other outpatient visit, 20-29 minutes
$82.5K
1.3K services$63.33/svc2.58x markup
96417Administration of additional new drug or substance into vein, 1 hour or lessโš  3.4x markup
$81.5K
1.4K services$58.45/svc3.39x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
J9299Injection, nivolumab, 1 mg472.0K$9.4M$19.973.53x
J9271Injection, pembrolizumab, 1 mg213.2K$7.2M$33.692.95x
J9228Injection, ipilimumab, 1 mg43.3K$4.7M$109.282.75x
J9298Injection, nivolumab and relatlimab-rmbw, 3 mg/1 mg23.7K$3.4M$142.922.95x
J9144Injection, daratumumab, 10 mg and hyaluronidase-fihj26.8K$1.0M$37.923.31x
J9119Injection, cemiplimab-rwlc, 1 mg45.5K$913.1K$20.075.15x
96413Administration of chemotherapy into vein, 1 hour or less6.0K$708.4K$118.623.48x
J3490Unclassified drugs126$698.6K$5.5K4.87x
99214Established patient office or other outpatient visit, 30-39 minutes6.4K$583.0K$91.082.69x
J2505Injection, pegfilgrastim, 6 mg147$453.0K$3.1K3.23x
J9145Injection, daratumumab, 10 mg8.0K$352.5K$44.052.69x
J9999Not otherwise classified, antineoplastic drugs63$298.9K$4.7K5.22x
J9264Injection, paclitaxel protein-bound particles, 1 mg24.5K$266.0K$10.872.54x
J9355Injection, trastuzumab, 10 mg3.0K$229.7K$77.834.02x
J9310Injection, rituximab, 100 mg267$186.1K$697.072.97x
J0897Injection, denosumab, 1 mg11.1K$169.9K$15.304.03x
J9305Injection, pemetrexed, 10 mg2.8K$152.1K$53.922.98x
J1930Injection, lanreotide, 1 mg2.6K$143.8K$54.462.85x
99213Established patient office or other outpatient visit, 20-29 minutes1.3K$82.5K$63.332.58x
96417Administration of additional new drug or substance into vein, 1 hour or less1.4K$81.5K$58.453.39x

Markup Analysis

Charge-to-Payment Ratio

3.27x

This provider submits charges 3.27 times higher than what Medicare actually pays.

What This Means

A markup ratio of 3.27x means for every $100 Medicare pays, this provider initially charges $327. This is higher than the national average.

Location

Lutherville, MD

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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