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 ยท OpenFeds ยท OpenSpending

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

Methodologyโ€ขDownload Data
  1. Home
  2. Providers
  3. Kai Zu
๐ŸŽ—๏ธ
MDIndividual

Kai Zu, M.D.

NPI: 1164583639
La Mesa, CA
10 years of data
Hematology-Oncology
$4.7M
Total Payments
17.4K
Beneficiaries
56.4K
Services
2.32x
Markup Ratio

Peer Comparison

96th
percentile in specialty
This provider$4.7M
Specialty median$339.6K

๐Ÿ“‹ Key Findings

1Billed $4.7M over 10 years
22.32x markup ratio (above median)
396th percentile in Hematology-Oncology by payments
41 procedure with >3x markup
โœ“ No flags detected

๐Ÿ”Ž Data Analysis

This provider's $4.7M in total Medicare payments ranks in the 96th percentile of Hematology-Oncology 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

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$277.85$110.662.51x$167.19$498.7K6.3K2.3K
2015$327.10$140.332.33x$186.77$648.7K6.2K1.9K
2016$316.07$142.082.22x$173.99$599.0K6.6K2.0K
2017$292.59$135.302.16x$157.29$635.6K7.0K2.0K
2018$297.70$148.782.00x$148.92$667.1K6.9K1.9K
2019$329.31$154.422.13x$174.89$550.7K6.1K1.8K
2020$324.87$140.452.31x$184.42$343.4K4.7K1.4K
2021$317.24$112.822.81x$204.42$387.0K4.9K1.6K
2022$110.69$46.902.36x$63.79$201.4K3.9K1.3K
2023$122.21$47.202.59x$75.01$192.3K3.8K1.3K

Top Procedures (20)

J2505Injection, pegfilgrastim, 6 mg
$1.8M
592 services$3.1K/svc2.16x markup
96413Infusion of chemotherapy into a vein up to 1 hour
$716.3K
6.1K services$118.14/svc2.50x markup
99214Established patient office or other outpatient, visit typically 25 minutes
$495.9K
5.8K services$86.13/svc2.32x markup
99213Established patient office or other outpatient visit, typically 15 minutes
$440.2K
7.4K services$59.79/svc2.24x markup
99232Subsequent hospital inpatient care, typically 25 minutes per day
$145.1K
2.5K services$58.33/svc2.34x markup
99223Initial hospital inpatient care, typically 70 minutes per day
$143.6K
889 services$161.52/svc2.29x markup
J9310Injection, rituximab, 100 mg
$119.1K
200 services$595.52/svc2.33x markup
96401Non-hormonal anti-neoplastic chemotherapy beneath the skin or into muscle
$86.0K
1.4K services$62.03/svc2.27x markup
99205New patient office or other outpatient visit, typically 60 minutes
$81.6K
496 services$164.48/svc2.34x markup
96365Infusion into a vein for therapy, prevention, or diagnosis up to 1 hour
$80.4K
1.4K services$59.08/svc2.37x markup
96372Injection beneath the skin or into muscle for therapy, diagnosis, or prevention
$77.9K
4.9K services$15.97/svc2.82x markup
99204New patient office or other outpatient visit, typically 45 minutes
$68.1K
545 services$124.91/svc2.52x markup
96417Infusion of different chemotherapy drug or substance into a vein up to 1 hour
$64.7K
1.1K services$56.94/svc2.54x markup
99233Subsequent hospital inpatient care, typically 35 minutes per day
$51.4K
617 services$83.31/svc2.40x markup
96367Infusion into a vein for therapy prevention or diagnosis additional sequential infusion up to 1 hour
$44.8K
1.7K services$25.71/svc2.64x markup
96375Injection of different drug or substance into a vein for therapy, diagnosis, or prevention
$34.8K
2.2K services$15.84/svc2.87x markup
J9299Injection, nivolumab, 1 mg
$30.3K
1.5K services$20.34/svc2.43x markup
96415Infusion of chemotherapy into a vein
$29.5K
1.2K services$25.03/svc2.56x markup
J9035Injection, bevacizumab, 10 mg
$26.3K
467 services$56.41/svc2.32x markup
J2469Injection, palonosetron hcl, 25 mcgโš  3.5x markup
$25.3K
2.2K services$11.39/svc3.54x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
J2505Injection, pegfilgrastim, 6 mg592$1.8M$3.1K2.16x
96413Infusion of chemotherapy into a vein up to 1 hour6.1K$716.3K$118.142.50x
99214Established patient office or other outpatient, visit typically 25 minutes5.8K$495.9K$86.132.32x
99213Established patient office or other outpatient visit, typically 15 minutes7.4K$440.2K$59.792.24x
99232Subsequent hospital inpatient care, typically 25 minutes per day2.5K$145.1K$58.332.34x
99223Initial hospital inpatient care, typically 70 minutes per day889$143.6K$161.522.29x
J9310Injection, rituximab, 100 mg200$119.1K$595.522.33x
96401Non-hormonal anti-neoplastic chemotherapy beneath the skin or into muscle1.4K$86.0K$62.032.27x
99205New patient office or other outpatient visit, typically 60 minutes496$81.6K$164.482.34x
96365Infusion into a vein for therapy, prevention, or diagnosis up to 1 hour1.4K$80.4K$59.082.37x
96372Injection beneath the skin or into muscle for therapy, diagnosis, or prevention4.9K$77.9K$15.972.82x
99204New patient office or other outpatient visit, typically 45 minutes545$68.1K$124.912.52x
96417Infusion of different chemotherapy drug or substance into a vein up to 1 hour1.1K$64.7K$56.942.54x
99233Subsequent hospital inpatient care, typically 35 minutes per day617$51.4K$83.312.40x
96367Infusion into a vein for therapy prevention or diagnosis additional sequential infusion up to 1 hour1.7K$44.8K$25.712.64x
96375Injection of different drug or substance into a vein for therapy, diagnosis, or prevention2.2K$34.8K$15.842.87x
J9299Injection, nivolumab, 1 mg1.5K$30.3K$20.342.43x
96415Infusion of chemotherapy into a vein1.2K$29.5K$25.032.56x
J9035Injection, bevacizumab, 10 mg467$26.3K$56.412.32x
J2469Injection, palonosetron hcl, 25 mcg2.2K$25.3K$11.393.54x

Markup Analysis

Charge-to-Payment Ratio

2.32x

This provider submits charges 2.32 times higher than what Medicare actually pays.

What This Means

A markup ratio of 2.32x means for every $100 Medicare pays, this provider initially charges $232. This is higher than the national average.

Location

La Mesa, CA

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 Hematology-Oncology providers in CA for peer comparison.

Kai Zu (you)
$4.7M
Luke Dreisbach, M.D.
$77.2M
Sachin Gupta, M.D.
$55.1M
Ravi Rao, MDโš ๏ธ
$49.1M
Michael Sherman, M.D., PHD
$38.9M
Nerses Tchekmedyian, M.D.
$38.0M
Show detailed table โ–พ
ProviderLocationTotal PaymentsStatus
Luke Dreisbach, M.D.Rancho Mirage, CA$77.2Mโœ“ Clear
Sachin Gupta, M.D.Fresno, CA$55.1Mโœ“ Clear
Ravi Rao, MDFresno, CA$49.1Mโš ๏ธ Flagged
Michael Sherman, M.D., PHDWalnut Creek, CA$38.9Mโœ“ Clear
Nerses Tchekmedyian, M.D.Irvine, CA$38.0Mโœ“ Clear

Related

Browse
โ† Back to Provider Directory
State
All providers in CA โ†’
Specialty
All Hematology-Oncology providers โ†’
Tool
Compare this provider โ†’
Analysis
Fraud Watchlist โ†’
Search
Search all providers โ†’

Share This Provider

Share this provider's Medicare payment information

Share:

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