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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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Methodologyโ€ขDownload Data
  1. Home
  2. Providers
  3. Changhyun Choi
๐Ÿ”ฌ
MDIndividual

Changhyun Choi, MD

NPI: 1114938578
Memphis, TN
7 years of data
Pathology
$7.9M
Total Payments
80.4K
Beneficiaries
89.6K
Services
3.76x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$7.9M
Specialty median$84.1K

๐Ÿ“‹ Key Findings

1Billed $7.9M over 7 years
23.76x markup ratio (above median)
399th percentile in Pathology by payments
451 services/day โ€” unusually high
5Payments surged 213% in 2018
614 procedures with >3x markup

This provider averages 51 services per working day

Based on 89.6K total services over 7 years (250 working days/year). Learn about impossible service volumes โ†’

๐Ÿ”Ž Data Analysis

This provider's $7.9M in total Medicare payments ranks in the 99th percentile of Pathology providers nationally.

Averaging 51 services per working day raises questions about billing patterns.

Medicare payments to this provider grew 130% from 2017 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 213% in 2018

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
2017$364.38$110.513.30x$253.87$489.7K5.1K4.8K
2018$469.03$135.183.47x$333.85$1.5M16.3K14.9K
2019$290.96$83.473.49x$207.49$1.8M19.5K17.4K
2020$358.59$117.053.06x$241.54$931.9K11.1K9.9K
2021$287.21$91.663.13x$195.55$1.0M12.3K10.9K
2022$287.12$90.773.16x$196.35$962.7K11.7K10.2K
2023$301.39$95.093.17x$206.30$1.1M13.8K12.3K

Top Procedures (20)

G0416Surgical pathology, gross and microscopic examinations, for prostate needle biopsy, any methodโš  5.9x markup
$1.9M
7.2K services$266.62/svc5.88x markup
88120Cell examination of urine
$1.9M
4.4K services$431.33/svc2.49x markup
88112Cell examination of specimenโš  3.4x markup
$1.4M
32.6K services$44.34/svc3.44x markup
88342Tissue or cell analysis by immunologic techniqueโš  3.3x markup
$1.4M
18.5K services$74.71/svc3.31x markup
88313Special stained specimen slides to examine tissue including interpretation and reportโš  3.1x markup
$952.9K
21.2K services$44.86/svc3.14x markup
88377Microscopic genetic examination manual
$117.7K
398 services$295.74/svc1.86x markup
88305Pathology examination of tissue using a microscope, intermediate complexityโš  6.2x markup
$93.3K
2.2K services$42.46/svc6.22x markup
88344Special stained specimen slides to examine tissueโš  3.2x markup
$19.5K
158 services$123.60/svc3.20x markup
88346Antibody evaluation
$15.9K
181 services$87.69/svc2.33x markup
88350Antibody evaluation
$12.3K
187 services$65.79/svc2.43x markup
88341Special stained specimen slides to examine tissueโš  3.8x markup
$10.5K
162 services$64.69/svc3.75x markup
88321Surgical pathology consultation and reportโš  3.3x markup
$6.7K
89 services$75.03/svc3.31x markup
82232Beta-2 microglobulin (protein) levelโš  3.6x markup
$6.4K
384 services$16.58/svc3.62x markup
88108Cell examination of specimen
$5.9K
138 services$43.05/svc2.11x markup
88307Pathology examination of tissue using a microscope, moderately high complexity
$3.2K
15 services$210.12/svc2.47x markup
88300Pathology examination of tissue using a microscope, limited examinationโš  3.5x markup
$2.0K
202 services$10.10/svc3.52x markup
82570Creatinine level to test for kidney function or muscle injuryโš  4.9x markup
$2.0K
384 services$5.31/svc4.90x markup
82043Urine microalbumin (protein) levelโš  5.5x markup
$2.0K
384 services$5.26/svc5.51x markup
84156Total protein level, urineโš  5.0x markup
$1.4K
382 services$3.76/svc5.05x markup
81003Automated urinalysis testโš  7.0x markup
$876.83
381 services$2.30/svc6.95x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
G0416Surgical pathology, gross and microscopic examinations, for prostate needle biopsy, any method7.2K$1.9M$266.625.88x
88120Cell examination of urine4.4K$1.9M$431.332.49x
88112Cell examination of specimen32.6K$1.4M$44.343.44x
88342Tissue or cell analysis by immunologic technique18.5K$1.4M$74.713.31x
88313Special stained specimen slides to examine tissue including interpretation and report21.2K$952.9K$44.863.14x
88377Microscopic genetic examination manual398$117.7K$295.741.86x
88305Pathology examination of tissue using a microscope, intermediate complexity2.2K$93.3K$42.466.22x
88344Special stained specimen slides to examine tissue158$19.5K$123.603.20x
88346Antibody evaluation181$15.9K$87.692.33x
88350Antibody evaluation187$12.3K$65.792.43x
88341Special stained specimen slides to examine tissue162$10.5K$64.693.75x
88321Surgical pathology consultation and report89$6.7K$75.033.31x
82232Beta-2 microglobulin (protein) level384$6.4K$16.583.62x
88108Cell examination of specimen138$5.9K$43.052.11x
88307Pathology examination of tissue using a microscope, moderately high complexity15$3.2K$210.122.47x
88300Pathology examination of tissue using a microscope, limited examination202$2.0K$10.103.52x
82570Creatinine level to test for kidney function or muscle injury384$2.0K$5.314.90x
82043Urine microalbumin (protein) level384$2.0K$5.265.51x
84156Total protein level, urine382$1.4K$3.765.05x
81003Automated urinalysis test381$876.83$2.306.95x

Markup Analysis

Charge-to-Payment Ratio

3.76x

This provider submits charges 3.76 times higher than what Medicare actually pays.

What This Means

A markup ratio of 3.76x means for every $100 Medicare pays, this provider initially charges $376. This is higher than the national average.

Location

Memphis, 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.

Changhyun Choi (you)
$7.9M
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.

Believe this data is inaccurate? Dispute this data