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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. Christopher Lum
๐Ÿ”ฌ
Individual

Christopher Lum

NPI: 1053358119
Honolulu, HI
10 years of data
Pathology
$4.6M
Total Payments
61.0K
Beneficiaries
83.3K
Services
2.7x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$4.6M
Specialty median$84.1K

๐Ÿ“‹ Key Findings

1Billed $4.6M over 10 years
22.7x markup ratio (above median)
399th percentile in Pathology by payments
41 procedure with >3x markup
โœ“ No flags detected

๐Ÿ”Ž Data Analysis

This provider's $4.6M in total Medicare payments ranks in the 99th percentile of Pathology providers nationally.

Medicare payments to this provider grew 132% from 2014 to 2023.

76% of their billing comes from a single procedure code (88305 โ€” Pathology examination of tissue using a microscope, intermediate complexity).

AI-generated analysis based on Medicare payment data.

Annual Medicare Payments

Annual Services Provided

Avg Payment per Service

Markup Ratio Over Time

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$101.51$49.012.07x$52.50$271.6K5.5K4.2K
2015$100.46$48.232.08x$52.23$347.6K6.8K5.0K
2016$120.35$64.751.86x$55.60$408.4K7.5K5.6K
2017$132.85$75.271.76x$57.58$446.4K8.6K6.2K
2018$136.18$71.911.89x$64.27$496.0K9.6K6.9K
2019$129.24$54.012.39x$75.23$461.7K8.7K6.4K
2020$135.69$54.912.47x$80.78$468.3K7.9K5.6K
2021$125.33$53.882.33x$71.45$546.9K9.0K6.6K
2022$136.58$56.272.43x$80.31$558.5K9.3K6.8K
2023$147.28$60.092.45x$87.19$630.0K10.4K7.7K

Top Procedures (20)

88305Pathology examination of tissue using a microscope, intermediate complexity
$3.5M
65.9K services$53.55/svc2.83x markup
88342Tissue or cell analysis by immunologic technique
$291.1K
3.4K services$84.58/svc2.29x markup
88341Special stained specimen slides to examine tissue
$212.2K
2.9K services$73.28/svc2.41x markup
88312Special stained specimen slides to identify organisms including interpretation and report
$156.3K
1.8K services$85.70/svc2.22x markup
88304Pathology examination of tissue using a microscope, moderately low complexity
$140.9K
4.4K services$31.96/svc2.70x markup
88346Antibody evaluation
$63.8K
655 services$97.47/svc1.90x markup
88350Antibody evaluation
$40.8K
544 services$74.92/svc2.01x markup
88313Special stained specimen slides to examine tissue including interpretation and report
$36.7K
589 services$62.34/svc2.25x markup
88323Surgical pathology consultation and report
$30.2K
290 services$104.13/svc2.17x markup
G0452Molecular pathology procedure; physician interpretation and report
$22.5K
834 services$26.93/svc1.89x markup
81235Gene analysis (epidermal growth factor receptor), common variants
$18.6K
68 services$274.21/svc1.04x markup
88321Surgical pathology consultation and report
$18.1K
240 services$75.34/svc1.73x markup
88307Pathology examination of tissue using a microscope, moderately high complexity
$15.3K
217 services$70.35/svc2.11x markup
88381Preparation of specimen, manual
$14.4K
153 services$93.97/svc2.32x markup
G0476Infectious agent detection by nucleic acid (dna or rna); human papillomavirus (hpv), high-risk types (eg, 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, 68) for cervical cancer screening, must be performed in addition to pap test
$11.0K
241 services$45.66/svc1.40x markup
G0461Immunohistochemistry or immunocytochemistry, per specimen; first single or multiplex antibody stain
$9.8K
128 services$76.20/svc2.02x markup
G0462Immunohistochemistry or immunocytochemistry, per specimen; each additional single or multiplex antibody stain (list separately in addition to code for primary procedure)
$5.6K
93 services$60.08/svc1.76x markup
88311Preparation of tissue for examination by removing any calcium present
$4.0K
391 services$10.34/svc2.24x markup
88363Microscopic genetic analysis of tissueโš  4.2x markup
$3.0K
156 services$19.27/svc4.15x markup
88344Special stained specimen slides to examine tissue, each multiplex procedure
$3.0K
20 services$150.27/svc2.60x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
88305Pathology examination of tissue using a microscope, intermediate complexity65.9K$3.5M$53.552.83x
88342Tissue or cell analysis by immunologic technique3.4K$291.1K$84.582.29x
88341Special stained specimen slides to examine tissue2.9K$212.2K$73.282.41x
88312Special stained specimen slides to identify organisms including interpretation and report1.8K$156.3K$85.702.22x
88304Pathology examination of tissue using a microscope, moderately low complexity4.4K$140.9K$31.962.70x
88346Antibody evaluation655$63.8K$97.471.90x
88350Antibody evaluation544$40.8K$74.922.01x
88313Special stained specimen slides to examine tissue including interpretation and report589$36.7K$62.342.25x
88323Surgical pathology consultation and report290$30.2K$104.132.17x
G0452Molecular pathology procedure; physician interpretation and report834$22.5K$26.931.89x
81235Gene analysis (epidermal growth factor receptor), common variants68$18.6K$274.211.04x
88321Surgical pathology consultation and report240$18.1K$75.341.73x
88307Pathology examination of tissue using a microscope, moderately high complexity217$15.3K$70.352.11x
88381Preparation of specimen, manual153$14.4K$93.972.32x
G0476Infectious agent detection by nucleic acid (dna or rna); human papillomavirus (hpv), high-risk types (eg, 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, 68) for cervical cancer screening, must be performed in addition to pap test241$11.0K$45.661.40x
G0461Immunohistochemistry or immunocytochemistry, per specimen; first single or multiplex antibody stain128$9.8K$76.202.02x
G0462Immunohistochemistry or immunocytochemistry, per specimen; each additional single or multiplex antibody stain (list separately in addition to code for primary procedure)93$5.6K$60.081.76x
88311Preparation of tissue for examination by removing any calcium present391$4.0K$10.342.24x
88363Microscopic genetic analysis of tissue156$3.0K$19.274.15x
88344Special stained specimen slides to examine tissue, each multiplex procedure20$3.0K$150.272.60x

Markup Analysis

Charge-to-Payment Ratio

2.7x

This provider submits charges 2.7 times higher than what Medicare actually pays.

What This Means

A markup ratio of 2.7x means for every $100 Medicare pays, this provider initially charges $270. This is higher than the national average.

Location

Honolulu, HI

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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