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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. Derek Welch
๐Ÿ”ฌ
MDIndividual

Derek Welch, M.D.

NPI: 1093753303
Nashville, TN
10 years of data
Pathology
$27.8M
Total Payments
472
Beneficiaries
2.3M
Services
3.8x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$27.8M
Specialty median$84.1K

๐Ÿ“‹ Key Findings

1Billed $27.8M over 10 years
23.8x markup ratio (above median)
399th percentile in Pathology by payments
4921 services/day โ€” physically implausible
5Payments surged 269% in 2020
612 procedures with >3x markup

โš ๏ธ This provider averages 921 services per working day โ€” physically unusual for an individual practitioner

Based on 2.3M total services over 10 years (250 working days/year). Learn about impossible service volumes โ†’

๐Ÿ”Ž Data Analysis

This provider's $27.8M in total Medicare payments ranks in the 99th percentile of Pathology providers nationally.

Averaging 921 services per working day raises questions about billing patterns.

Medicare payments to this provider grew 2155% 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 269% in 2020

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$168.56$39.914.22x$128.65$183.5K4.6K16
2015$171.03$46.623.67x$124.41$245.2K5.3K24
2016$27.90$6.294.44x$21.61$712.7K113.2K39
2017$28.37$6.314.50x$22.06$1.2M190.0K44
2018$26.93$5.544.86x$21.39$1.3M233.4K40
2019$28.27$5.964.74x$22.31$1.8M297.9K56
2020$66.62$19.283.46x$47.34$6.5M339.3K64
2021$64.38$16.363.94x$48.02$6.9M419.5K64
2022$52.39$12.964.04x$39.43$4.9M374.5K61
2023$35.69$12.782.79x$22.91$4.1M323.9K64

Top Procedures (20)

U0003Infectious agent detection by nucleic acid (dna or rna); severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (coronavirus disease [covid-19]), amplified probe technique, making use of high throughput technologies as described by cms-2020-01-rโš  3.6x markup
$9.0M
107.1K services$84.24/svc3.56x markup
36415Insertion of needle into vein for collection of blood sampleโš  4.8x markup
$6.9M
1.9M services$3.74/svc4.81x markup
G0145Screening cytopathology, cervical or vaginal (any reporting system), collected in preservative fluid, automated thin layer preparation, with screening by automated system and manual rescreening under physician supervisionโš  3.6x markup
$2.0M
74.6K services$26.40/svc3.56x markup
U0005Infectious agent detection by nucleic acid (dna or rna); severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (coronavirus disease [covid-19]), amplified probe technique, cdc or non-cdc, making use of high throughput technologies, completed withinโš  3.0x markup
$1.6M
64.7K services$24.91/svc3.01x markup
88305Pathology examination of tissue using a microscope, intermediate complexityโš  5.0x markup
$1.4M
39.6K services$34.81/svc5.03x markup
87481Detection test for candida species (yeast), amplified probe technique
$589.6K
16.9K services$34.88/svc2.83x markup
87493Detection test by nucleic acid for clostridium difficile, amplified probe techniqueโš  3.8x markup
$480.9K
12.1K services$39.84/svc3.78x markup
87798Detection test by nucleic acid for organism, amplified probe technique
$403.1K
11.5K services$35.16/svc2.81x markup
87624Detection test by nucleic acid for human papillomavirus (hpv), high-risk typesโš  3.1x markup
$387.7K
11.1K services$34.93/svc3.15x markup
87661Detection test by nucleic acid for trichomonas vaginalis (genital parasite), amplified probe techniqueโš  3.4x markup
$322.7K
9.2K services$35.05/svc3.41x markup
87522Detection test by nucleic acid for hepatitis c virus, quantificationโš  3.8x markup
$272.6K
5.7K services$47.50/svc3.78x markup
87902Analysis test by nucleic acid for hepatitis c virus
$267.1K
1.0K services$265.21/svc2.84x markup
87511Detection test for gardnerella vaginalis (bacteria), amplified probe technique
$252.2K
7.2K services$34.88/svc2.83x markup
88374Microscopic genetic analysis of tissue, computer-assisted technology, initial procedure, each multiplex procedure
$230.8K
2.1K services$111.56/svc2.42x markup
87536Detection test by nucleic acid for hiv-1 virus, quantificationโš  3.8x markup
$208.5K
2.2K services$93.34/svc3.82x markup
87637Detection test by multiplex amplified probe technique for severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (covid-19), influenza virus types a and b, and respiratory syncytial virusโš  3.0x markup
$205.3K
1.5K services$140.30/svc3.05x markup
87491Detection test by nucleic acid for chlamydia trachomatis, amplified probe technique
$199.1K
5.7K services$35.06/svc2.82x markup
G0476Infectious agent detection by nucleic acid (dna or rna); human papillomavirus (hpv), high-risk types (e.g., 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, 68) for cervical cancer screening, must be performed in addition to pap testโš  3.1x markup
$195.6K
5.6K services$35.01/svc3.14x markup
87591Detection test by nucleic acid for neisseria gonorrhoeae (gonorrhoeae bacteria), amplified probe technique
$189.2K
5.4K services$35.09/svc2.81x markup
88341Special stained specimen slides to examine tissue, each additional procedure
$159.5K
4.0K services$40.07/svc2.05x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
U0003Infectious agent detection by nucleic acid (dna or rna); severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (coronavirus disease [covid-19]), amplified probe technique, making use of high throughput technologies as described by cms-2020-01-r107.1K$9.0M$84.243.56x
36415Insertion of needle into vein for collection of blood sample1.9M$6.9M$3.744.81x
G0145Screening cytopathology, cervical or vaginal (any reporting system), collected in preservative fluid, automated thin layer preparation, with screening by automated system and manual rescreening under physician supervision74.6K$2.0M$26.403.56x
U0005Infectious agent detection by nucleic acid (dna or rna); severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (coronavirus disease [covid-19]), amplified probe technique, cdc or non-cdc, making use of high throughput technologies, completed within64.7K$1.6M$24.913.01x
88305Pathology examination of tissue using a microscope, intermediate complexity39.6K$1.4M$34.815.03x
87481Detection test for candida species (yeast), amplified probe technique16.9K$589.6K$34.882.83x
87493Detection test by nucleic acid for clostridium difficile, amplified probe technique12.1K$480.9K$39.843.78x
87798Detection test by nucleic acid for organism, amplified probe technique11.5K$403.1K$35.162.81x
87624Detection test by nucleic acid for human papillomavirus (hpv), high-risk types11.1K$387.7K$34.933.15x
87661Detection test by nucleic acid for trichomonas vaginalis (genital parasite), amplified probe technique9.2K$322.7K$35.053.41x
87522Detection test by nucleic acid for hepatitis c virus, quantification5.7K$272.6K$47.503.78x
87902Analysis test by nucleic acid for hepatitis c virus1.0K$267.1K$265.212.84x
87511Detection test for gardnerella vaginalis (bacteria), amplified probe technique7.2K$252.2K$34.882.83x
88374Microscopic genetic analysis of tissue, computer-assisted technology, initial procedure, each multiplex procedure2.1K$230.8K$111.562.42x
87536Detection test by nucleic acid for hiv-1 virus, quantification2.2K$208.5K$93.343.82x
87637Detection test by multiplex amplified probe technique for severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (covid-19), influenza virus types a and b, and respiratory syncytial virus1.5K$205.3K$140.303.05x
87491Detection test by nucleic acid for chlamydia trachomatis, amplified probe technique5.7K$199.1K$35.062.82x
G0476Infectious agent detection by nucleic acid (dna or rna); human papillomavirus (hpv), high-risk types (e.g., 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, 68) for cervical cancer screening, must be performed in addition to pap test5.6K$195.6K$35.013.14x
87591Detection test by nucleic acid for neisseria gonorrhoeae (gonorrhoeae bacteria), amplified probe technique5.4K$189.2K$35.092.81x
88341Special stained specimen slides to examine tissue, each additional procedure4.0K$159.5K$40.072.05x

Markup Analysis

Charge-to-Payment Ratio

3.8x

This provider submits charges 3.8 times higher than what Medicare actually pays.

What This Means

A markup ratio of 3.8x means for every $100 Medicare pays, this provider initially charges $380. This is higher than the national average.

Location

Nashville, TN

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 Pathology providers in TN for peer comparison.

Derek Welch (you)
$27.8M
Richard Kinsey, MD
$40.6M
Show detailed table โ–พ
ProviderLocationTotal PaymentsStatus
Richard Kinsey, MDMemphis, TN$40.6Mโœ“ 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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