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 · OpenFeds · OpenSpending

© 2026 OpenMedicare. Independent data journalism. Built by TheDataProject.ai

Methodology•Download Data
  1. Home
  2. Providers
  3. David Kosiorek
⚕️
PAIndividual

David Kosiorek, PA C

NPI: 1083604144
Port Richey, FL
10 years of data
Physician Assistant
$4.2M
Total Payments
48.8K
Beneficiaries
81.2K
Services
1.9x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$4.2M
Specialty median$22.5K

📋 Key Findings

1Billed $4.2M over 10 years
21.9x markup ratio
399th percentile in Physician Assistant by payments
4Payments surged 69% in 2022
53 procedures with >3x markup
✓ No flags detected

🔎 Data Analysis

This provider's $4.2M in total Medicare payments ranks in the 99th percentile of Physician Assistant providers nationally.

This provider's billing patterns fall within normal ranges for their specialty.

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 69% in 2022

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
2014$165.52$82.932.00x$82.59$577.7K10.9K7.2K
2015$149.05$74.362.00x$74.69$454.8K9.4K6.3K
2016$133.92$68.801.95x$65.12$453.7K9.9K6.7K
2017$128.32$60.352.13x$67.97$254.2K6.5K4.6K
2018$127.21$57.442.21x$69.77$249.7K5.9K4.1K
2019$114.87$54.062.12x$60.81$233.4K5.2K3.5K
2020$138.34$64.662.14x$73.68$276.6K5.4K3.7K
2021$146.41$72.252.03x$74.16$340.3K6.2K3.7K
2022$147.56$74.331.99x$73.23$575.1K10.2K4.9K
2023$159.14$81.661.95x$77.48$750.3K11.5K4.2K

Top Procedures (20)

11100Biopsy of single growth of skin and/or tissue
$512.9K
9.1K services$56.57/svc1.87x markup
12032Repair of wound (2.6 to 7.5 centimeters) of the scalp, underarms, trunk, arms, and/or legs
$503.8K
2.6K services$196.17/svc1.64x markup
11102Tangential biopsy of single skin lesion
$343.5K
6.7K services$51.55/svc2.14x markup
99213Established patient office or other outpatient visit, typically 15 minutes
$340.7K
6.9K services$49.12/svc1.77x markup
17110Destruction of up to 14 skin growths
$296.2K
4.4K services$68.02/svc1.77x markup
77280Obtaining data needed to develop the optimal radiation treatment, 1 treatment area
$251.7K
1.4K services$175.56/svc1.63x markup
99214Established patient office or other outpatient, visit typically 25 minutes
$246.0K
3.7K services$66.19/svc1.71x markup
17000Destruction of skin growth
$239.8K
9.0K services$26.56/svc2.74x markup
99212Established patient office or other outpatient visit, typically 10 minutes
$218.2K
7.1K services$30.58/svc1.71x markup
11103Tangential biopsy of additional skin lesion
$158.3K
4.6K services$34.44/svc1.64x markup
11101Biopsy of each additional growth of skin and/or tissue
$125.1K
6.1K services$20.63/svc1.65x markup
77401Superficial and/or low voltage radiation treatment delivery
$106.7K
3.4K services$31.43/svc1.39x markup
77285Obtaining data needed to develop the optimal radiation treatment, 2 treatment areas
$96.7K
338 services$285.97/svc1.60x markup
11602Removal of malignant growth (1.1 to 2.0 centimeters) of the trunk, arms, or legs⚠ 3.1x markup
$86.6K
1.0K services$83.84/svc3.13x markup
77290Obtaining data needed to develop the optimal radiation treatment, 3 or more treatment areas or any number of treatment areas where special treatment is involved
$77.6K
262 services$296.14/svc1.64x markup
11402Removal of growth (1.1 to 2.0 centimeters) of the trunk, arms, or legs⚠ 3.1x markup
$72.3K
1.3K services$57.00/svc3.15x markup
69100Biopsy of ear⚠ 3.0x markup
$58.2K
1.7K services$34.72/svc3.03x markup
11301Shaving of 0.6 centimeters to 1.0 centimeters skin growth of the trunk, arms, or legs
$42.8K
675 services$63.45/svc2.00x markup
99203New patient office or other outpatient visit, typically 30 minutes
$36.0K
567 services$63.56/svc1.79x markup
17004Destruction of 15 or more skin growths
$31.0K
353 services$87.75/svc1.91x markup
Show detailed table ▾
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
11100Biopsy of single growth of skin and/or tissue9.1K$512.9K$56.571.87x
12032Repair of wound (2.6 to 7.5 centimeters) of the scalp, underarms, trunk, arms, and/or legs2.6K$503.8K$196.171.64x
11102Tangential biopsy of single skin lesion6.7K$343.5K$51.552.14x
99213Established patient office or other outpatient visit, typically 15 minutes6.9K$340.7K$49.121.77x
17110Destruction of up to 14 skin growths4.4K$296.2K$68.021.77x
77280Obtaining data needed to develop the optimal radiation treatment, 1 treatment area1.4K$251.7K$175.561.63x
99214Established patient office or other outpatient, visit typically 25 minutes3.7K$246.0K$66.191.71x
17000Destruction of skin growth9.0K$239.8K$26.562.74x
99212Established patient office or other outpatient visit, typically 10 minutes7.1K$218.2K$30.581.71x
11103Tangential biopsy of additional skin lesion4.6K$158.3K$34.441.64x
11101Biopsy of each additional growth of skin and/or tissue6.1K$125.1K$20.631.65x
77401Superficial and/or low voltage radiation treatment delivery3.4K$106.7K$31.431.39x
77285Obtaining data needed to develop the optimal radiation treatment, 2 treatment areas338$96.7K$285.971.60x
11602Removal of malignant growth (1.1 to 2.0 centimeters) of the trunk, arms, or legs1.0K$86.6K$83.843.13x
77290Obtaining data needed to develop the optimal radiation treatment, 3 or more treatment areas or any number of treatment areas where special treatment is involved262$77.6K$296.141.64x
11402Removal of growth (1.1 to 2.0 centimeters) of the trunk, arms, or legs1.3K$72.3K$57.003.15x
69100Biopsy of ear1.7K$58.2K$34.723.03x
11301Shaving of 0.6 centimeters to 1.0 centimeters skin growth of the trunk, arms, or legs675$42.8K$63.452.00x
99203New patient office or other outpatient visit, typically 30 minutes567$36.0K$63.561.79x
17004Destruction of 15 or more skin growths353$31.0K$87.751.91x

Markup Analysis

Charge-to-Payment Ratio

1.9x

This provider submits charges 1.9 times higher than what Medicare actually pays.

What This Means

A markup ratio of 1.9x means for every $100 Medicare pays, this provider initially charges $190. This is lower than the national average.

Location

Port Richey, 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
← Back to Provider Directory
State
All providers in FL →
Specialty
All Physician Assistant providers →
Tool
Compare this provider →
Analysis
Fraud Watchlist →
Search
Search all providers →

Share This Provider

Share this provider's Medicare payment information

Share:

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.

Believe this data is inaccurate? Dispute this data