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. Yoon Pak
๐Ÿฉบ
MDIndividual

Yoon Pak, M.D.

NPI: 1932113313
Cerritos, CA
10 years of data
Family Practice
$3.8M
Total Payments
45.6K
Beneficiaries
81.2K
Services
2.53x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$3.8M
Specialty median$55.2K

๐Ÿ“‹ Key Findings

1Billed $3.8M over 10 years
22.53x markup ratio (above median)
399th percentile in Family Practice by payments
48 procedures with >3x markup
โœ“ No flags detected

๐Ÿ”Ž Data Analysis

This provider's $3.8M in total Medicare payments ranks in the 99th percentile of Family Practice 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$108.24$44.652.42x$63.59$541.4K9.1K6.2K
2015$124.40$47.562.62x$76.84$506.6K10.2K6.6K
2016$119.07$49.042.43x$70.03$495.0K9.9K6.3K
2017$120.77$52.172.31x$68.60$549.0K10.7K6.8K
2018$142.01$48.292.94x$93.72$369.7K7.0K4.7K
2019$143.23$45.483.15x$97.75$272.4K7.1K3.7K
2020$141.34$44.053.21x$97.29$239.4K6.8K3.1K
2021$141.78$48.262.94x$93.52$284.7K6.8K3.0K
2022$149.87$49.083.05x$100.79$253.8K6.4K2.5K
2023$144.78$47.173.07x$97.61$277.0K7.1K2.7K

Top Procedures (20)

99212Established patient office or other outpatient visit, typically 10 minutes
$932.7K
24.4K services$38.25/svc1.74x markup
93306Ultrasound examination of heart including color-depicted blood flow rate, direction, and valve function
$679.9K
3.5K services$193.75/svc2.80x markup
93880Ultrasound scanning of blood flow (outside the brain) on both sides of head and neck
$609.4K
3.5K services$173.02/svc1.52x markup
76700Ultrasound of abdomen
$444.0K
4.0K services$110.31/svc2.92x markup
76536Ultrasound of head and neckโš  3.0x markup
$404.9K
3.9K services$104.29/svc3.05x markup
96372Injection beneath the skin or into muscle for therapy, diagnosis, or preventionโš  4.0x markup
$137.1K
9.2K services$14.87/svc4.04x markup
76872Ultrasound of rectumโš  3.5x markup
$130.7K
1.4K services$94.06/svc3.45x markup
76856Ultrasound of pelvisโš  5.4x markup
$127.4K
2.1K services$59.90/svc5.37x markup
90662Vaccine for influenza for injection into muscle
$74.2K
1.8K services$41.41/svc1.37x markup
96374Injection of drug or substance into a vein for therapy, diagnosis, or prevention
$59.0K
1.4K services$40.94/svc2.13x markup
G0008Administration of influenza virus vaccine
$30.2K
1.5K services$19.62/svc1.03x markup
82962Blood glucose (sugar) test performed by hand-held instrumentโš  5.3x markup
$29.3K
9.2K services$3.19/svc5.34x markup
90740Vaccine for Hepatitis B (3 dose schedule) for injection into muscle, dialysis or immunosuppressed patient
$25.0K
199 services$125.88/svc1.34x markup
36415Insertion of needle into vein for collection of blood sampleโš  3.5x markup
$18.3K
5.5K services$3.35/svc3.55x markup
94644Respiratory inhaled aerosol treatment to relieve airway obstruction, first hour
$17.3K
465 services$37.28/svc1.51x markup
96360Hydration infusion into a vein 31 minutes to 1 hour
$13.8K
340 services$40.71/svc2.32x markup
90670Pneumococcal vaccine for injection into muscle
$12.8K
73 services$175.47/svc1.27x markup
J2920Injection, methylprednisolone sodium succinate, up to 40 mgโš  6.9x markup
$8.0K
2.8K services$2.91/svc6.88x markup
96361Hydration infusion into a veinโš  5.2x markup
$4.2K
341 services$12.44/svc5.17x markup
G0438Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit
$3.7K
21 services$176.61/svc1.41x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
99212Established patient office or other outpatient visit, typically 10 minutes24.4K$932.7K$38.251.74x
93306Ultrasound examination of heart including color-depicted blood flow rate, direction, and valve function3.5K$679.9K$193.752.80x
93880Ultrasound scanning of blood flow (outside the brain) on both sides of head and neck3.5K$609.4K$173.021.52x
76700Ultrasound of abdomen4.0K$444.0K$110.312.92x
76536Ultrasound of head and neck3.9K$404.9K$104.293.05x
96372Injection beneath the skin or into muscle for therapy, diagnosis, or prevention9.2K$137.1K$14.874.04x
76872Ultrasound of rectum1.4K$130.7K$94.063.45x
76856Ultrasound of pelvis2.1K$127.4K$59.905.37x
90662Vaccine for influenza for injection into muscle1.8K$74.2K$41.411.37x
96374Injection of drug or substance into a vein for therapy, diagnosis, or prevention1.4K$59.0K$40.942.13x
G0008Administration of influenza virus vaccine1.5K$30.2K$19.621.03x
82962Blood glucose (sugar) test performed by hand-held instrument9.2K$29.3K$3.195.34x
90740Vaccine for Hepatitis B (3 dose schedule) for injection into muscle, dialysis or immunosuppressed patient199$25.0K$125.881.34x
36415Insertion of needle into vein for collection of blood sample5.5K$18.3K$3.353.55x
94644Respiratory inhaled aerosol treatment to relieve airway obstruction, first hour465$17.3K$37.281.51x
96360Hydration infusion into a vein 31 minutes to 1 hour340$13.8K$40.712.32x
90670Pneumococcal vaccine for injection into muscle73$12.8K$175.471.27x
J2920Injection, methylprednisolone sodium succinate, up to 40 mg2.8K$8.0K$2.916.88x
96361Hydration infusion into a vein341$4.2K$12.445.17x
G0438Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit21$3.7K$176.611.41x

Markup Analysis

Charge-to-Payment Ratio

2.53x

This provider submits charges 2.53 times higher than what Medicare actually pays.

What This Means

A markup ratio of 2.53x means for every $100 Medicare pays, this provider initially charges $253. This is higher than the national average.

Location

Cerritos, CA

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
โ† Back to Provider Directory
State
All providers in CA โ†’
Specialty
All Family Practice 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