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Denis0242/README.md

Hi, Denis 👋

Decision Support Analyst

Healthcare Analytics • BI & Reporting

Building SQL-driven decision support solutions that transform data into executive-ready insights.

📍 Oakland, CA

📧 vantjohnn@gmail.com

🔗 LinkedIn
📊 Tableau Public
🐙 GitHub


About Me

Decision Support Analyst with 5 years of experience delivering healthcare, insurance, and operational analytics that enable data-driven business and clinical decision-making. Experienced in transforming complex operational, patient, claims, and business data into decision-ready executive insights using SQL, Tableau, Power BI, Python, and Power Query. Specializes in SQL-based decision support, KPI framework development, executive reporting, healthcare operational analytics, business intelligence, and performance measurement that help organizations improve operational efficiency, patient outcomes, and strategic decision-making.


What I Build

I design analytics solutions that help organizations answer questions such as:

  • Where are operational bottlenecks?
  • Which KPIs require executive attention?
  • How can healthcare resources be allocated more effectively?
  • What trends should leaders act on?
  • Which operational risks require immediate intervention?
  • How can reporting become more reliable and actionable?

My work combines SQL, business intelligence, statistics, and dashboard development to produce decision-ready insights for healthcare and business leaders.


📈 Decision Support Framework

Every project in this portfolio follows the same evidence-driven framework to transform raw data into business decisions.

Business Problem
        ↓
SQL Analysis & Data Preparation
        ↓
KPI Development & Statistical Analysis
        ↓
Interactive Dashboard & Reporting
        ↓
Executive Insights
        ↓
Decision Support
        ↓
Business Impact

📌 Impact Snapshot

Portfolio Highlights
📊 Analytics Projects 6 End-to-End Portfolio Projects
🚀 Streamlit Apps 6 Interactive Applications
🏥 Primary Domain Healthcare Decision Support
📈 Secondary Domains Insurance & Customer Analytics
📊 Reporting Focus Executive KPI Dashboards & Decision Support
🛠️ Core Tools SQL • Tableau • Python • Power BI • Excel

🎯 Business Problems I Solve

This portfolio demonstrates how analytics supports better operational and strategic decisions by helping organizations:

  • Monitor hospital performance
  • Improve patient flow
  • Reduce operational bottlenecks
  • Optimize healthcare resources
  • Understand claims cost drivers
  • Improve patient engagement
  • Analyze clinical care pathways
  • Validate business decisions through statistical experimentation

The following projects demonstrate how SQL, business intelligence, statistical analysis, and interactive dashboards are applied to solve real healthcare, insurance, and customer analytics problems through decision support.

🗺️ Portfolio Journey

Each project builds on the previous one to demonstrate increasingly advanced decision support capabilities.

Hospital Operations Analytics
        ↓
Patient CareFlow Analytics
        ↓
Claims Cost Risk Analytics
        ↓
Patient Engagement Dashboard
        ↓
CarePath Analytics
        ↓
A/B Testing & Experimentation Framework

Together these projects showcase SQL analytics, KPI development, statistical analysis, executive reporting, healthcare operations, and evidence-based decision support.

🚀 Featured Analytics Projects

🏥 Healthcare Operations Decision Support

Executive decision support solution designed to help healthcare leaders monitor patient flow, capacity utilization, readmissions, treatment outcomes, and operational performance through KPI reporting, interactive dashboards, and data-driven insights.

Business Question

How can healthcare leaders monitor operational performance and identify improvement opportunities?

Key Focus

  • Hospital Operations Analytics
  • Capacity Planning
  • Readmission Monitoring
  • Length of Stay (LOS) Analysis
  • Decision Support Reporting
  • Executive KPI Monitoring

Tools

Tableau SQL Healthcare Analytics Business Intelligence

🔗 Repo: Healthcare Operations Analytics

Live App: Streamlit App


🏥 Patient CareFlow & Outcomes Analytics

Decision support solution that analyzes patient progression, engagement, operational KPIs, and treatment outcomes to help healthcare leaders improve care delivery, monitor performance, and support operational decision-making.

Business Question

How can healthcare organizations improve patient flow, reduce delays, and optimize treatment progression?

Key Focus

  • Patient Flow Analytics
  • Treatment Progression
  • Healthcare KPI Reporting
  • Operational Analytics
  • Dashboard Storytelling

Tools

Tableau SQL Python

🔗 Repo: Patient CareFlow Analytics

Live App: Streamlit App


📋 Claims Cost Risk Analytics

Decision support solution that analyzes insurance claims performance, risk exposure, cost drivers, and operational KPIs to support business planning, risk monitoring, and executive decision-making.

Business Question

How can insurers identify cost drivers and operational risks using analytics?

Key Focus

  • Claims Analytics
  • Cost Analysis
  • Risk Reporting
  • KPI Monitoring
  • Executive Reporting

Tools

Tableau SQL Python

🔗Repo: Claims Cost Risk Analytics

Live App: Streamlit App


💙 Patient Engagement Dashboard

Decision support dashboard designed to evaluate patient engagement, operational efficiency, and treatment trends, enabling healthcare leaders to monitor KPIs and improve patient outcomes.

Business Question

How can healthcare leaders monitor operational performance and identify improvement opportunities?

Key Focus

  • Patient Engagement Analytics
  • Cohort Analysis
  • Healthcare Reporting
  • Performance Monitoring
  • Operational KPIs

Tools

Tableau SQL Power BI

🔗 Repo: Patient Engagement Dashboard

Live App: Streamlit App


🩺 CarePath Analytics

Decision support solution that analyzes clinical care pathways, treatment progression, patient outcomes, and operational bottlenecks to help healthcare organizations optimize care delivery, improve clinical performance, and support evidence-based decision-making.

Business Question

How can healthcare organizations optimize clinical care pathways, identify treatment bottlenecks, and improve patient outcomes through data-driven analytics?

Key Focus

  • Clinical Care Pathway Analytics
  • Treatment Progression Analysis
  • Patient Outcome Monitoring
  • Care Path Optimization
  • Operational Bottleneck Analysis

Tools

SQL Tableau Python

🔗 Repo: CarePath Analytics

Live App: Streamlit App

--

🧪 A/B Testing & Experimentation Framework

Decision support solution that leverages A/B testing, statistical experimentation, and hypothesis testing to evaluate business initiatives, measure the impact of product and operational changes, and support confident, evidence-based decision-making.

Business Question

How can organizations use controlled experiments and statistical analysis to validate business decisions, measure change impact, and optimize performance?

Key Focus

  • A/B Testing
  • Experimental Design
  • Hypothesis Testing
  • Statistical Analysis
  • Performance Measurement
  • Decision Support

Tools

Python SQL Statistics

🔗 Repo: A/B Testing & Experimentation Framework

Live App: Render App


Portfolio Coverage

  • 🏥 Hospital Operations Analytics
  • 🚑 Patient Flow & Care Delivery
  • 💰 Insurance Claims Analytics
  • ❤️ Patient Engagement Analytics
  • 🩺 Clinical CarePath Analytics
  • 🧪 A/B Testing & Experimentation
  • 📈 Executive KPI Reporting
  • 📊 Statistical Decision Support

🛠️ Decision Support Technology Stack

Analytics & BI

SQL Tableau Power BI Excel Power Query

Programming & Data

Python Pandas NumPy Matplotlib

Data Platforms & Workflow

AWS Snowflake Redshift Alteryx

Apps & Deployment

Streamlit GitHub

🗄️ Data Modeling

  • Data Modeling
  • Relational Data Structures
  • Fact & Dimension Tables
  • Power Query Data Transformation
  • Data Cleaning & Validation

📈 Decision Support Methods

SQL Analytics

  • CTEs
  • Window Functions
  • Joins
  • Aggregations
  • CASE WHEN Logic
  • Date Functions
  • KPI Engineering

Decision Support

  • KPI Framework Development
  • Performance Measurement
  • Root Cause Analysis
  • Trend Analysis
  • Operational Analytics
  • Executive Reporting

Analytics

  • KPI Analysis
  • Cohort Analysis
  • Retention Analysis
  • Customer Segmentation
  • Funnel Analysis
  • Trend Analysis
  • Operational Analytics
  • Healthcare KPI Analysis

Statistical Methods

  • Descriptive Statistics
  • Inferential Statistics
  • Hypothesis Testing
  • Confidence Intervals
  • A/B Testing
  • Statistical Comparison

🏆 Certifications

  • Tableau Desktop Specialist
  • Generative AI
  • Data Science — Digicrome

🎯 Career Focus

I specialize in designing SQL-driven decision support solutions that enable healthcare organizations to improve operational performance, optimize patient care, monitor executive KPIs, and support evidence-based decision-making.

My portfolio combines healthcare operations analytics, insurance analytics, business intelligence, statistical analysis, dashboard development, and experimentation to demonstrate how data can be transformed into actionable insights for executives and operational leaders.

Additional interests include customer analytics, retention analysis, and user journey analytics.


Core Areas of Interest

  • 🏥 Decision Support Analytics
  • 📊 Healthcare Analytics
  • 📈 Business Intelligence
  • 📋 Executive KPI Reporting
  • 📉 Operational Analytics
  • 🩺 Clinical Analytics
  • 🧪 Statistical Experimentation
  • 🧾 SQL Analytics
  • 📊 Dashboard Development

This portfolio showcases how SQL, business intelligence, healthcare analytics, statistical methods, and executive reporting can be combined to transform complex operational, clinical, and business data into decision-ready insights.

I'm passionate about helping healthcare organizations make faster, smarter, and more evidence-based decisions through analytics, KPI reporting, and decision support.

If you're interested in healthcare analytics, decision support, or business intelligence, I'd be happy to connect.

Pinned Loading

  1. Hospital-Operations-Analytics Hospital-Operations-Analytics Public

    Healthcare Operations Analytics Dashboard built with Tableau to monitor patient flow, capacity utilization, readmissions, LOS, treatment outcomes, and operational bottlenecks for executive decision…

    Python

  2. Patient-Careflow Patient-Careflow Public

    Healthcare product analytics dashboard for patient journey, retention, operational KPIs, and careflow optimization using Tableau, SQL, and Python.

    Python

  3. Claims-Cost-Analysis Claims-Cost-Analysis Public

    Insurance claims analytics platform analyzing claim costs, risk patterns, fraud indicators, and operational KPIs using SQL, Python, Tableau, and Streamlit to support data-driven insurance decisions.

    Python

  4. Patient-Engagement Patient-Engagement Public

    Healthcare product analytics system analyzing patient engagement, retention, care pathways, and behavioral trends using SQL, Python, Tableau, and predictive analytics to support data-driven healthc…

    Python

  5. CarePath-Analytics CarePath-Analytics Public

    Healthcare analytics system combining patient journey analysis, predictive modeling, and care pathway optimization.

    Jupyter Notebook

  6. AB-Testing-Experimentation-Framework AB-Testing-Experimentation-Framework Public

    A/B testing framework with hypothesis testing, power analysis, and Ship/No-Ship decision logic for product experimentation.

    Python