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. Gonzalo Diaz
๐Ÿซ
MDIndividual

Gonzalo Diaz, MD

NPI: 1134129240
El Paso, TX
10 years of data
Pulmonary Disease
$5.6M
Total Payments
29.9K
Beneficiaries
44.6K
Services
3.44x
Markup Ratio

Peer Comparison

99th
percentile in specialty
This provider$5.6M
Specialty median$121.6K

๐Ÿ“‹ Key Findings

1Billed $5.6M over 10 years
23.44x markup ratio (above median)
399th percentile in Pulmonary Disease by payments
414 procedures with >3x markup
โœ“ No flags detected

๐Ÿ”Ž Data Analysis

This provider's $5.6M in total Medicare payments ranks in the 99th percentile of Pulmonary Disease 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$453.21$124.163.65x$329.05$552.6K3.6K2.5K
2015$402.71$112.163.59x$290.55$562.0K4.3K3.1K
2016$418.20$112.863.71x$305.34$488.5K5.5K2.9K
2017$388.15$104.293.72x$283.86$568.5K5.2K3.2K
2018$323.91$92.083.52x$231.83$639.0K5.2K3.5K
2019$372.99$100.803.70x$272.19$909.0K6.6K4.5K
2020$590.43$155.073.81x$435.36$487.4K3.8K2.7K
2021$407.05$110.723.68x$296.33$508.1K3.8K2.5K
2022$542.69$138.943.91x$403.75$392.2K3.0K2.1K
2023$422.17$115.783.65x$306.39$497.8K3.7K2.9K

Top Procedures (20)

95811Sleep monitoring of patient (6 years or older) in sleep lab with continued pressured respiratory assistance by mask or breathing tubeโš  3.8x markup
$2.3M
4.8K services$474.78/svc3.78x markup
95810Sleep monitoring of patient (6 years or older) in sleep labโš  4.0x markup
$1.5M
3.4K services$452.03/svc3.98x markup
99213Established patient office or other outpatient visit, typically 15 minutes
$910.3K
18.0K services$50.68/svc2.32x markup
99203New patient office or other outpatient visit, typically 30 minutesโš  3.2x markup
$299.4K
4.2K services$70.77/svc3.19x markup
99214Established patient office or other outpatient, visit typically 25 minutes
$283.9K
3.6K services$77.88/svc2.16x markup
99212Established patient office or other outpatient visit, typically 10 minutes
$187.4K
6.5K services$28.70/svc2.57x markup
71250CT scan chestโš  3.6x markup
$19.3K
164 services$117.70/svc3.62x markup
99442Telephone medical discussion with physician, 11-20 minutesโš  3.3x markup
$18.4K
409 services$44.97/svc3.34x markup
95165Preparation and provision of single or multiple antigens for allergen immunotherapy
$16.8K
1.9K services$8.98/svc2.23x markup
G0399Home sleep test (hst) with type iii portable monitor, unattended; minimum of 4 channels: 2 respiratory movement/airflow, 1 ecg/heart rate and 1 oxygen saturationโš  6.5x markup
$14.7K
167 services$88.03/svc6.54x markup
94729Measurement of lung diffusing capacityโš  3.3x markup
$10.8K
268 services$40.30/svc3.25x markup
94726Determination of lung volumes using plethysmographyโš  3.2x markup
$10.1K
258 services$39.28/svc3.23x markup
94060Measurement and graphic recording of the amount and speed of breathed air, before and following medication administrationโš  3.3x markup
$7.9K
194 services$40.69/svc3.33x markup
99443Telephone medical discussion with physician, 21-30 minutesโš  5.2x markup
$4.2K
62 services$68.01/svc5.22x markup
99204New patient office or other outpatient visit, 45-59 minutes
$3.9K
31 services$126.97/svc2.06x markup
71020X-ray of chest, 2 views, front and sideโš  3.6x markup
$2.4K
121 services$19.97/svc3.57x markup
71046X-ray of chest, 2 viewsโš  3.3x markup
$1.8K
78 services$23.32/svc3.25x markup
94375Diagnostic testing in a pulmonary function labโš  3.2x markup
$1.7K
58 services$29.21/svc3.21x markup
95012Measurement of inhaled nitric oxide gasโš  3.2x markup
$1.4K
99 services$14.31/svc3.21x markup
95977Electronic analysis of implanted neurostimulator generator with complex cranial nerve stimulator programming
$1.3K
34 services$39.17/svc2.55x markup
Show detailed table โ–พ
CodeDescriptionServicesPaymentsAvg/ServiceMarkup
95811Sleep monitoring of patient (6 years or older) in sleep lab with continued pressured respiratory assistance by mask or breathing tube4.8K$2.3M$474.783.78x
95810Sleep monitoring of patient (6 years or older) in sleep lab3.4K$1.5M$452.033.98x
99213Established patient office or other outpatient visit, typically 15 minutes18.0K$910.3K$50.682.32x
99203New patient office or other outpatient visit, typically 30 minutes4.2K$299.4K$70.773.19x
99214Established patient office or other outpatient, visit typically 25 minutes3.6K$283.9K$77.882.16x
99212Established patient office or other outpatient visit, typically 10 minutes6.5K$187.4K$28.702.57x
71250CT scan chest164$19.3K$117.703.62x
99442Telephone medical discussion with physician, 11-20 minutes409$18.4K$44.973.34x
95165Preparation and provision of single or multiple antigens for allergen immunotherapy1.9K$16.8K$8.982.23x
G0399Home sleep test (hst) with type iii portable monitor, unattended; minimum of 4 channels: 2 respiratory movement/airflow, 1 ecg/heart rate and 1 oxygen saturation167$14.7K$88.036.54x
94729Measurement of lung diffusing capacity268$10.8K$40.303.25x
94726Determination of lung volumes using plethysmography258$10.1K$39.283.23x
94060Measurement and graphic recording of the amount and speed of breathed air, before and following medication administration194$7.9K$40.693.33x
99443Telephone medical discussion with physician, 21-30 minutes62$4.2K$68.015.22x
99204New patient office or other outpatient visit, 45-59 minutes31$3.9K$126.972.06x
71020X-ray of chest, 2 views, front and side121$2.4K$19.973.57x
71046X-ray of chest, 2 views78$1.8K$23.323.25x
94375Diagnostic testing in a pulmonary function lab58$1.7K$29.213.21x
95012Measurement of inhaled nitric oxide gas99$1.4K$14.313.21x
95977Electronic analysis of implanted neurostimulator generator with complex cranial nerve stimulator programming34$1.3K$39.172.55x

Markup Analysis

Charge-to-Payment Ratio

3.44x

This provider submits charges 3.44 times higher than what Medicare actually pays.

What This Means

A markup ratio of 3.44x means for every $100 Medicare pays, this provider initially charges $344. This is higher than the national average.

Location

El Paso, TX

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 TX โ†’
Specialty
All Pulmonary Disease 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