Medical Billing Revenue Analysis

I'm looking for an expert in Excel to analyze medical billing information. The focus of the analysis will be on revenue.

Key requirements:
- Analyze revenue by department and service type
- Use Excel to create detailed reports and visualizations
- Identify trends and provide insights

Ideal skills and experience:
- Proficient in Excel, especially with pivot tables and advanced formulas
- Experience with medical billing data
- Strong analytical skills and attention to detail
- Ability to present data in a clear and understandable manner

Please provide samples of similar work done.