John D. Cook • 7/17/2026

Visualizing Medical Code Hierarchy

This article follows up on previous posts about ICD-10 and HCPCS codes by using Python's squarify library to generate treemaps. The treemaps show how many medical codes begin with each letter, with square sizes proportional to code counts. The post includes full Python code using matplotlib and squarify to create both maps, with notes on omitted letters (R, U) due to small sizes. The HCPCS map shows codes like G (2010) and J (1232), while ICD-10 highlights S (31052) and T (10090). A practical tutorial for data visualization in healthcare IT.

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#Python #Matplotlib #Treemap